ICUP Proceedings Search

Combinations of bait and spray were tested against susceptible and field-collected German cockroaches, Blattella germanica. In exposure tests, residual deposits of all sprays were lethal to a susceptible strain, but pyrethrin and certain pyrethroid sprays were repellent in choice boxes. Indoxacarb b...

Cockroaches are of the great importance in public health. Blattella germanica is the main specie that infests commercial kitchens and industrial kitchens, due to conditions for their development. One of the methods to control B. germanica is the use of insecticides in the gel bait formulation. The o...

Insecticide resistance in the German cockroach, Blattella germanica (L.), is a significant challenge affecting pest management professionals worldwide. The use of gel baits against German cockroaches has become a popular option in Asia. However, recently, there were anecdotal reports that the field ...

The residual effect of an insecticide is directly related to its formulation, active ingredient and application rates. The aim of this study was to evaluate the effectiveness of 2 distinct commercial insecticides products against Blattella germanica nymphs during the following six months after their...

The control of Blattella germanica represents a major challenge for Brazilian PCOs (Pest Control Operators), due to their great capacity for reproduction and dispersal on tropical weather environments. Several gel bait insecticides have been developed and sold in Brazil, during the past few years, f...

Periplaneta americana and Blattella germanica are pests of great importance in urban areas, mainly due to their role as vectors of pathogens and capability of causing allergies. The interspecific differences between these cockroaches can lead to different results in their control. No chemical (liqui...

The residual effect of an insecticide is directly related to its formulation, active ingredient and application rates. The aim of this study was to evaluate the effectiveness of 2 distinct commercial insecticides products against Blattella germanica and Periplaneta americana during the following six...

From 2014 to 2016, in Moscow, Kaluga region, and Ural (Ekaterinburg) we have been monitored the susceptibility of male German cockroaches to topically applying 1μl insecticides of different structure. It was found that all cockroach populations are most resistant to pyrethroid insecticides, especial...

Cockroaches (Blattodea) are important mechanical vectors for the transmission of many pathogens including bacteria, protozoa, fungi, and viruses, and can contaminate food, water, and affect animals and humans. These pathogens can be carried in different parts of the cockroach body (legs, mouthparts)...

Cereal grains are the major source of food for humans and most domesticated animals. In many developing countries, overall post harvest losses of cereals of between 10–15% are fairly common. The grain weevil, Sitophilus granaries is a pest of wheat, oats, rye, barley, rice and corn. Grain weevils ca...

The German cockroach, Blattella germanica (L.) is an important urban insect pest world-wide. Heavy reliance and frequent usage of residual insecticides have led to the development of insecticide resistance in the German cockroach. Bait formulations containing fipronil and indoxacarb are excellent re...

The control of the German cockroach Blattella germanica is a major challenge for Brazilian pest control operators (PCOs) due to their great capacity for reproduction and dispersal. The study described aimed to evaluate the efficacy of the insecticide Thiamethoxam (Optigard LT® 25% – Wettable Granule...

In this study, we examined the resistance status of six field-collected strains from Singapore to eight insecticides, as well as the resistance of the parental through F5 generations after they were selected with indoxacarb bait. All strains showed no resistance to acetamiprid (0.7–1.9x), imidaclopr...

We report the results achieved in laboratory tests conducted to compare the efficacy and the attractiveness of commercial gel formulations, containing abamectin, fipronil, indoxacarb, acetamiprid and imidacloprid, for the control of nymphs and adults of cockroaches. The tests were replicated 4 times...

The German cockroach (Blattella germanica) is host for several parasites. Due to the high population density in laboratory cultures of cockroaches, transmission rates of parasites as well as parasite prevalence can also be high. Cockroaches are important test organisms for efficacy testing of insect...

Blattella germanica is one of the most important urban pests in households, restaurants, storehouses, hospitals, supermarkets and food industries. The aim of this work was to evaluate lambdacyhalothrin residual (dose of 2,5mL/L water- Demand 10 CS) on surfaces of tiles, polished green slates and cem...

Blattella germanica is a very important pest in homes, food service establishments and other structures in São Paulo city. The roach bait control is usually recommended. The aim this work was to evaluate the minimal dose of different active ingredients in bait commercial gel to B. germanica control....

Blattella germanica is considered one of the main pests found in commercial shops mainly foodstuff. Excessive use of insecticides, flaws in the applications of pyrethroid group insecticides, and failure on rotation of chemical groups, result in selection of resistant cockroaches populations, which i...

The cockroach Blattela germanica (L. 1767) is the most important synanthropic specie to develop high populations in habitations. This study has evaluated the mortality of B. germanica exposed to different treated areas in equivalent amount of insecticides to verify the mortality caused by pesticides...

The Asian cockroach, Blattella asahinai (Mizukubo) was first described in 1981 from Okinawa, Japan (Mizukubo, 1981), and introduced into the state of Florida, USA in 1986. By 2007 B. asahinai was established in the states of Alabama, Georgia and Texas, USA. B. asahinai is a peridomestic pest which b...

Control of adult roaches is usually not problematic as those life cycle stages are actively exploring the habitat for food sources. Nymphs are less mobile and therefore less likely to access a bait spot directly. Natural occurring populations of German cockroach (Blattella germanica L.) show a relat...

The Urban Pest Advisory Service (UPAS) is responsible for urban pests in the city of Zurich, Switzerland. We advise approximately 2’000 people per year who have questions or problems regarding arthropods and their control, we survey the pest situation in the city and control rats in public areas. Si...

Optimisation of performance of dry flowable powder formulations for control of crawling insect pests is known to involve control of particle size and effective distribution of active ingredient. Enhanced pick-up by the insect cuticle has been demonstrated through use of powder bearing an electrostat...

Secondary kill of the German cockroach, Blattella germanica (L)., by baits was reported to increase the overall control efficacy of bait products. However, most studies have been based on laboratory strains and small nymphs. We compared the secondary kill of four cockroach gel baits against various ...

The Urban Pest Advisory Service (UPAS) is responsible for urban pests in the city of Zurich, Switzerland. We give approximately 2,000 consultations per year concerning pests and their control, survey the pest situation in the city and control rats in public areas. We present data on the temporal cha...

A fipronil SC formulation was evaluated against a multi-resistant population of Blattella germanica. The test site was an eight-story apartment building, with 150 individual apartments in Neratovice, Central Bohemia, Czech Republic. Conditions in the apartments included general disorder and an abund...

Imidacloprid, acetamiprid, thiamethoxam and thiacloprid have the same mode of action. They are agonists the nicotinic acethylcholine receptor, affecting the synapses in the insect central nervous system. These insecticides are gaining widespread use for controlling urban insect pests in Russia. Four...

Modern bait formulations have been used successfully to control infestations of the German cockroach, Blattella germanica (L.) since the mid 1980s. Because of the slow-acting insecticides used in most bait formulations, unmetabolized insecticide may be excreted in the feces and oral secretions, and ...

Commercial gel bait formulations, including two new formulations of indoxacarb (0.6% AI; RG2V3 and DPX411), were evaluated for efficacy against a "bait averse" strain of German cockroaches (Saginaw strain). Bait consumption and subsequent mortality of the Saginaw cockroaches were compared with that ...

The German cockroach, Blattella germanica (L.) and the Smooth cockroach, Symploce pallens (Stephens) are important cosmopolitan household pests which infest hotels, restaurants and apartments. Coprophagy is defined as the behavior of fecal consumption. It plays an important role in providing nutrien...

As a result of the rapid rate of urbanization in Botswana, street food vending has become very popular as it supports a large number of the population with affordable, nutritious foods. There has been an associated increase in the number of cockroaches around vending sites in the streets. Cockroache...

Neonicotinoids imidacloprid and thiamethoxam share a common mode of action. They are agonist of the nicotinic acetylcholine receptor, affecting the synapses in the central nervous system. These insecticides are gaining widespread use for controlling urban insect pests in Russia. They are insecticide...

Three experimental gel matrices containing indoxacarb and three market-leading Maxforce gels containing either fipronil or hydramethylnon were evaluated and the roles of active ingredients and bait bases in the bait performance were examined against both lab susceptible and bait averse strains of Ge...

he biological activities of permethrin and deltamethrin silica mixtures were studied. The effect of silica mixture depended on insect sex and age, type of insecticide and the amounts of insecticide added to the silica. Only a very low amount of deltamethrin added to silica 0.1 mg/g gave KD50 or KD95...

Although there are few cockroaches in newly built or insecticide-treated buildings or houses, they enter from outside, increase in number and spread out widely as time goes by. To elucidate how German cockroaches distribute widely in such places, we previously investigated their horizontal movement ...

Bait aversion is a behavioral avoidance phenomenon, whereupon some naturally and/or artificially (e.g. toxic baits) selected Blattella germanica genotypes become less responsive to or completely avoid certain phagostimulatory food ingredients. Cases of avoidance behaviors, including associative lear...

Insecticide resistance in insects is a well-documented phenomenon that is equally related to toxicology and evolutionary biology. Insecticide resistance in the German cockroach has a long history dating back over 60 years. Thus, the recent evolution of gel bait aversion resistance is but one example...

Bait aversion has recently resurfaced, approximately six to ten years after the first known case of bait aversion (glucose aversion) was corrected. Anecdotal reports from Pest Management Professionals have indicated poor acceptance and control failures on commercial cockroach gel baits since late 19...

The German cockroach is the most common cockroach found indoors, such as hospitals, homes, restaurants, etc. In hospitals, because of the presence of adequate food and living environment, they can develop into large population and live throughout the buildings. They can contaminate food with differe...

The toxicity of granular ant bait formulations containing abamectin B1, orthoboric acid, or propoxur was evaluated in a series of laboratory experiments against American, Periplaneta americana (L.), and German, Blattella germanica (L.), cockroaches. LT50 values for American cockroaches ranged from &...

This study was carried out to determine the composition, distribution and abundance of arthropod fauna of an urban waste treatment plant near Milan, Italy, in order to identify some potential biological control agents for Diptera Muscidae. For five months, from June to October 2004, the arthropod fa...

The current study, in three methods, topical application, surface contact (WHO glass jar) method and toxic baits, was designed to investigate the relationship between permethrin German cockroach (Blattella germanica (L.)) resistant strains and fipronil. Twelve German cockroach strains used in this s...

Shape and characteristics in five domiciliary cockroach-feces Feces of domiciliary cockroaches often contaminate food or medicine packages. The presence of feces in foraging places is evidence of a cockroach infestation. The shape and other characteristics of feces differ among species. When they fe...

Physiological factors related to bait aversion in the German cockroach, Blattella germanica (L.), were investigated in a series of laboratory experiments. We compared the metabolic rates, respiration patterns, and taste receptor perceptions of control and bait averse German cockroaches. Both strains...

The processes by which insects acquire toxic doses of the microencapsulated formulation of lambda-cyhalothrin (Demand CS) were studied using the German cockroach, Blattella germanica (L.). Cockroaches exposed to treated substrates acquired toxic doses of the insecticide rapidly, and HPLC analysis of...

The dynamics of colonisation, persistence, and extinction of Blattella germanicaand Plodia interpunctella populations was studied in a hospital kitchen and a food plant. Metapopulations of both pests persisted during the period of the study, despite the presence of regular monitoring and pest contro...

Laboratory trials were done describing the primary and secondary kill ofBlattella germanica (L.) in response to MaxForce Gold, a new 0.03% AI fipronil-based cockroach bait. In bioassays measuring primary kill, MaxForce Gold at 0.1 g product/m2 caused ca. 90% mortality (14 DAT) of adult males and fem...

This study compares statistical methodologies for the detection of low levels of insecticide resistance in the German cockroach. Results show that logistic regression and resistance ratios are relatively ineffective in distinguishing modest differences between strains, whether dose-mortality or time...

Field strain male German cockroaches,Blattella germanica (L.), considered “resistant” to fipronil by standard topical application methodology, were found to readily consume a novel 0.03% fipronil gel bait and succumb. Although a simple method, valid for contact sprays or residual deposits, topical a...

German cockroach, Blattella germanica (L.), catch by five types of traps and modifications of each for a total of 15 different treatments, were tested under controlled laboratory conditions. Multivariate analysis of variance (MANOVA) was used to detect differences among traps. The response variables...

The German cockroach, Blattella germanica (L.), is the most important cockroach pest in Russia. After WW II, the use of inorganic compounds — such as boric acid, sodium fluoride, and arsenic — for cockroach control decreased, and the use of organic insecticides — such as organochlorines, organophosp...

The use of baits for the control of cockroaches in homes is now commonplace. To date, most bait studies have focused on the German cockroach, Blattella germanica (L). However, in many parts of the world, especially the tropics, the American cockroach,Periplaneta americana(L), is a more common pest. ...

Field studies were conducted to compare the performance of a new formulation of Goliath® cockroach gel (0.3g/kg fipronil) to a range of other commercial cockroach gels. These were carried out in Sydney, NSW, Australia, against German cockroach, Blattella germanica (L), and in Cairns, Queensland, Aus...

Most manufacturers warn applicators to avoid contaminating cockroach baits with conventional aerosol or liquid insecticides. However, at least one study has concluded that small amounts of insecticides do not affect bait performance. In this study we use mint oil, a relatively nontoxic — yet highly ...

Experimental gel and powder bait formulations containing 0.25, 0.5, and 1.0% Indoxacarb were evaluated in a series of laboratory and field studies against the German cockroach,Blattella germanica (L.). Mortality was first determined in 18 by 31 by 10 cm plastic boxes with loosely fitting covers. Twe...

Insecticidal activities of noviflumuron formulated as dust, gel, and suspension concentrate (SC) were evaluated against the German cockroach, Blattella germanica (L.), in the laboratory and in apartments. In laboratory studies conducted in large cockroach arenas (1 m2 boxes), population reductions a...

The objective of the research presented here was to evaluate the impact of the introduction of a toxic food bait on foraging choice by the German cockroach, Blattella germanica (L.). This was done by analysing the importance of learning visual cues associated with feeding sites and the importance of...

Pest status of household and structural pests is based primarily on their persistence in the urban environment. Persistence of pest populations is determined by availability of reservoir habitats that harbor large and stable populations, which supply individuals to maintain small, local infestations...

Twenty three strains of field populations of the German cockroach, Blattella germanica (L.) collected from hotels and restaurants from various localities in peninsular Malaysia were tested for their susceptibility to commonly used insecticides (propoxur, bendiocarb, chlorpyrifos, fenitrothion, pirim...

German cockroaches, Blattella germanica (L.), live in aggregates and are able to return to their resting sites. Stability of aggregates is ensured both by individual navigation abilities and by conspecific recognition. Naviga tion capacities (estimated by orientation angle of escape direction and by...

The utility of fipronil and perhaps other phenylpyrazoles for German cockroach, Blattella germanica, control may be affected by resistance to cyclodienes in field populations, because of cross resistance between these two classes of insecticides. Field populations of B. germanica were sampled for th...

The aim of this study was to investigate food bait preference in Blattella germanica (L.) cockroaches in relation to age and to compare their feeding preferences in several choice situations. Food choice presents two components: attractiveness measured by food type eaten first and feeding stimulatio...

Secondary mortality occurs when foragers (e.g., adult males and females) feed on or contact an insecticide, return to the aggregation, and translocate the insecticide to the shelter and its vicinity. Relatively more sedentary stages of the population then contact or eat the translocated insecticide ...

Cockroaches are common pests in urban environments around the world. A tremendous amount of papers have appeared on the behaviour of cockroaches. However, the details of their behaviour have not been completely clarified. We have already investigated the nocturnal behaviour of the German cockroach, ...

Though much is known about cockroach baiting systems, that knowledge is highly compart-mentalised, reducing its utility. We advocate an integrated approach to the study of cockroach baiting, which focuses on the interactions among various food components, and readily integrates across behavioural, p...

The present investigation demonstrates the effect of a single treatment with a chitin synthesis inhibitor (lufenuron) on small, medium and large nymphs as well as adults of the German cockroach, Blattella germanica (L.). The trial was conducted as a long-term field study in three mass food producing...

Control of cockroach populations in urban environments is now very often performed with insecticides presented in food bait formulations. To be efficient, food baits must attract pests so that contact is made with the active substance and/or that it is ingested. Food baits may be less efficient for ...

Residual performance of a pyrethroid/chitin synthesis inhibitor (alpha-cypermethrin/flufenoxuron) suspension concentrate formulation on plywood panels against German cockroaches was examined in the laboratory for up to 6 months of aging using three evaluation methods (forced-contact, self-contact an...

German cockroaches occur in habitats that are generally warm and moist, and such abiotic conditions are also favorable for infection with entomopathogenic fungi. There is an increasing interest for the use of entomopathogens, particularly entomopathogenic fungi, for suppression of insect pests. We h...

Numerous studies have shown that German cockroaches, Blattella germanica (L.), are often resistant to insecticides in settings where insecticides have been used extensively in the past. We have now examined resistance in German cockroaches collected in homes in which insecticide usage has been minim...

Field studies were conducted to compare the performance of Goliath® Cockroach Gel (fipronil) and a spray treatment of Cislin Residual Insecticide® (deltamethrin). These were carried out in Sydney, NSW, Australia against Blattella germanica (L), and Townsville, Queensland, against a mixed population ...

The Urban Pest Advisory Service with three part-time employees is responsible for the hygienic aspects concerning urban pests in the city of Zurich, Switzerland. The city has a surface of 9,200 hectares and 360,000 inhabitants. The main fields of work are the following: 1. to give advice to the publ...

Resistance to pyrethroid insecticides has become common in field populations of the German cockroach, Blattella germanica (L.), in the United States and elsewhere. Some populations are highly resistant to as many as eight or nine pyrethroids. The primary mechanisms of resistance are enzymatic degrad...

Demand CS® (lambda-cyhalothrin) has been designed specifically for use in urban pest management. The product is based on microencapsulation technology which encloses the liquid active ingredient in a polymer shell to provide protection against hostile environmental conditions. Electron microscopy an...

Swine production is an important component of North Carolina’s agricultural economy. Cockroaches have long been recognized as important pests in swine production and severe infestations may contribute significantly to disease maintenance and transmission. However, management of cockroach populations...

German cockroach Blattella germanica (L.) is in Western Siberia distributed everywhere. In old towns with numerous buildings of late XIX - early XX century limited distribution has Oriental cockroach Blatta orientalis (L.). In past several years it is discovered some expansion of the species: number...

Lithium perfluorooctanesulfonate (LPOS, proposed common name SulfotineTM) is an isomeric mixture containing approximately 70% of the linear isomer and 30% branched isomers. Molecular formula for LPOS is C8F17LiO3S, and acute oral LD50 is greater than 5,000 mg/kg. LPOS exhibits promising oral toxicit...

Over the last decade there has been a steady growth in the use of insecticidal baits to control cockroaches, particularly since the development of slow-acting, non-repellent compounds such as hydramethylnon and, most recently, fipronil. These baits have become increasingly popular for a number of re...

An experimental 2.15% imidacloprid-based gel bait containing »44% water was evaluated in laboratory and field studies against the German cockroach, Blattella germanica (L.). In continuous exposure tests, toxicity and presumably bait consumption varied with cockroach stage, deprivation of competitive...

Following the failure of some applications against German cockroaches (Blattella germanica) in France, questions have been raised as to the role, and level, that insecticide resistance may have played in these failures. To answer the question , samples of cockroaches were collected from two sites in...

A modified Ebeling choice box was designed to evaluate the repellency of moving ambient air to American, Periplaneta americana (L.), German, Blattella germanica (L.), and smokybrown, Periplaneta fuliginosa (Serville), cockroaches using air velocities of 0 - 4.75 m/s. The modified choice box tested t...

Cockroaches could represent one of the most important hygienic problems, since they can contaminate food with bacteria, transmit diseases and cause human allergies. For this reason, urban governments and food industries devote part of their balance to cover the cost of their control. One of the firs...

Imidacloprid belongs to a new group of insecticides, the chlorinated nicotine derivatives. It has been shown to have activity against a range of pests including termites, aphids, fleas, beetles and thrips. A gel formulation has been developed for use against cockroaches and this study examined the e...

The regular and effective control of some synanthropic crawling insects as cockroaches and ants is unavoidable but due to the requirements of human health and environment protection, their elimination needs new concepts and methods. Cockroaches, first of all the German cockroach Blattella germanica ...

In a field population (RHA, Roanoke VA, USA) of Blattella germanica a decline in the efficacy of hydramethlynon has been documented for eight years. In 1987 >85% reduction of apartment infestations was achieved 4 wk after application, in 1990 reduction declined to 73%, and in 1995 reduction declined...

The Chitin Synthesis Inhibitor, triflumuron, has great potential for the control of German cockroach, Blattella germanica (L). Field trails were carried out to evaluate its efficacy in combination with a short residual, conventional, insecticide DDVP, and when used alone. The insecticides were appli...

The antennal grooming behavior in Blattella germanica (L.), involves the coordinated use of the foreleg tibia and tarsus, and the mouthparts. The foreleg opposite the antenna is used to bend the flagellum to the mouthparts, after which it is pulled through the labium and maxillum by the resilience o...

Silica dusts with different physical properties were tested against the German cockroach Blattella germanica. The dusts varied in their effects on cockroach mortality according to their physical properties. Oil adsorption, pore volume and surface area were the most important characteristics while pa...

Four simulated domestic environments were each infested with mixed populations (3,300 insects) of German cockroaches (Blattella germanica). The simulated domestic environments (containers) were maintained at 25°C and 45% r.h. and cockroaches were fed and watered ad lib. After an acclimation period o...

Containerised insecticide bait products offer considerable advantages for control of urban crawling insect pests. However the differences in insecticide susceptibility and food preference between some pest species have resulted in a diversity of commercial bait products, each targeted at specific in...

Records from a two year period from over 24,000 dwellings in the London Borough of Southwark were examined and infestations of German cockroaches, recorded by inspection and trapping, were analysed. Factors identified as possibly influencing infestation levels were block size and type of heating sys...

Field and laboratory studies were initiated in 1993 to investigate the effect(s) of specific insecticide use strategies on resistant populations of German cockroach, Blattella germanica. Infestation levels were monitored using sticky traps, and these data formed the basis for the estimates of treatm...

Cockroach allergen (Bla g 1) content was determined in floordust of 46 homes with a recent cockroach extermination in Amsterdam. IgE antibodies to Blattella germanica were determined in venous blood samples of 46 children (4-12 years) and one of their biological parents (24-54 years). Specific IgE t...

A new type of bait has been developed, aimed at control of pest insects, and tested successfully on the model insect Blattella germanica (L.) - the German cockroach. The active ingredient, termed a nutritional metabolism disrupter (NMD), is a non-toxic composition of the compounds oxypurinol and xan...

Chronic, unacceptable, insecticide resistant German cockroach (Elartella germanica) populations exist in some of the U.S. Army's food service facilities We have conducted field trials using heat to control German cockroaches in food service facilities. The process used involved: caulking holes in wa...

A betacyfluthrin SC containing 12.5% active ingredient was introduced to the pest control market (Responsar SCm). Applications by pest control professionals have shown good efficacy against Blattella germanica. On porous surfaces the particles stay more on the surface and are not so readily absorbed...

The current situation concerning cockroach (Blattella germanica (L.)) presence and insecticide control was investigated in high-rise blocks of low-income flats in the French city of Rennes. The aim of this study was to analyse the results of professional cockroach insecticide treatments and to try t...

Patented Film Forming Aqueous Spray Technology or 'FFAST' has been used to develop AquaPy, a water based product containing synergised pyrethrins for use in the control of public health and hygiene pests. This product is highly flexible and can be applied undiluted through Ultra Low Volume (ULV) spr...

Five representative types of bakeries were surveyed in the city of Riyadh, K.S.A. to ascertain pest situations and various schemes on pest control management. The principal pests include stored product pests (e.g., Tribolium confusum Duval, Tribolium castaneum (Hbst.), Mus musculus and Rattus rattus...

Cockroaches settling down in various sanitary trade institutions, industrial establishments as well as in residential buildings may spread potential infectious diseases and allergy or - through their disgust provoking effect - may disturb people living or working there. As a consequence, regular con...

A formulation consisting of the pyrethroid insecticide alphacypermethrin and flufenoxuron, an acylurea insect growth regulator, has been shown to give effective and persistent control of cockroach infestations after a single treatment. Flufenoxuron is a new high performance residual insecticide for ...

Observations of the nocturnal behaviour of the German cockroach, Blattella germanica, were carried out using single or mixed populations of males, gravid females, ungravid females and nymphs. The results of these studies can be summarised as follows: 1. The proportion of cockroaches present in a fee...

Resistance to organochlorine, organophosphorous (OP) and carbamate insecticides in the German cockroach Blattella germanica has been documented for many years. In the past, significant bendiocarb resistance has been reported in the United Kingdom. More recently, resistance has been reported to the p...

German cockroach (Blattella germanica) control treatment history has rarely been accompanied by resistance monitoring in the field. Consequently, while cockroach 'resistance', receives much publicity, it is a fact that, to date, only a handful of complaints that are due to pyrethroid resistance, hav...

Triflumuron is a substituted benzoylphenyl urea compound with a good chitin synthesis inhibition activity. Trial data is presented to demonstrate the efficacy of triflumuron applied as a 480 g/litre suspension concentrate, product name Starycide', against the German cockroach. Two experimental metho...

Laboratory from 1987 to 1991. A screening of the insecticide resistance in B. germanica in some selected locations was conducted with permethrin using tarsal contact tests to estimate KT50, (/WHO/VBC/75.593). Based on these data more detailed measurement of the resistance in the German Cockroaches f...

During the first two days of laboratory trials, catches on sticky traps (Ekolex-V) of the German cockroach (Blarrella germmica) were higher than those of subsequent days. In the case of sexed groups of adults, catches of the first and second days ranged from 14.2 to 28.3%. Consecutive daily catches ...

Small groups of nymphs and adults, or of 5th and 6th instar nymphs of the Oriental cockroach Blatta orientalis, were exposed to hydramethylnon baits Maxforce) for periods of time ranging from 1 to 14 days. These insects were also given access to standard laboratory cockroach food as an alternative t...

The activities of released German cockroaches in a vacant wooden house were investigated. Migrations to rooms away from the release point were infrequent and most cockroaches remained near the release point. Populations of cockroaches which became established in rooms, increased in summer but decrea...

Commercial formulations of avermectin based baits were evaluated in laboratory and field studies against the German cockroach, Blattella germanica (L.). In continuous exposure tests with adult males, LT50s ranged from ca. 2.5 to >200d for Roach Ender and an experimental aerosol gel formulation, r...

German cockroaches (Blattella germanica (L.)) are known to be susceptible to infection by the entomopathogenic nematode, Steinernema carpocapaue (Weiser) (Koehler el. al., 1992). Nematodes placed on moist filter paper in petri dishes (50 nematodes per cm2) killed all adult cockroaches after 3 days o...

Multi-resistant strains of Blattella germanica are now common, and strategies for their continued control using conventional insecticides need to be devised rationally if long-term suppression of these nuisance insects is to be achieved. Newer insecticides such as growth regulators may have a role i...

Concrete, wood, glass and ceramic tiles were treated with the same quantity of active ingredient applied at different concentrations. The active ingredients, permethrin, alpha-cypermethrin and bendiocarb were used. The formulations were diluted in water. Either 1 litre; 0.6 or 0.5 litre; 0.3 or 0.25...