Longevity and lifetime fecundity were significantly reduced after topical application of LC10, LC20, and LC60's of chlorpyrifos-methyl to 2-d-old female German cockroaches, Blattella germanica (L.). Low concentrations (LC10 and LC20) often resulted in failure of the first ootheca to hatch. This effect is temporary, and greater than or equal to 90% of subsequent oothecae hatched normally. Applic...

The effects of four diets (commercial rat food, 5, 25, and 65% protein) on reproduction and daily food consumption of male and female German cockroaches were investigated. Females compensate for low dietary protein levels by elevating consumption rates and reproduce normally. Conversely, a high-protein diet significantly delayed mating in females and resulted in smaller oothecae. Percentage hat...

The toxicities of two new insecticides, hydramet.hylnon and abamectin, were evaluated against one susceptible and seven insecticide-resistant strains of 81attella gennanica. (L.) Both materials proved to be potent insecticides against the susceptible strain. There was no difference in toxicity, based on LTfoO values, of hydramethylnon between resistant and susceptible strains in a feeding bioas...

A field study on cockroach species diversity, and influence of sanitation on infestation level, was conducted on six different locations (four apartment settings [Tmas, Bmaung2, Relau and Kmelayu], a residential slum setting [Sg Batu] and a terrace houses setting [Bmaungl]) in Penang Island, Malaysia. A total number of 192 residential premises were sampled and 3,289 cockroaches, consisting of 1...

Cockroaches are common in the environment of many hospitals in Ghana; however, little is known about their public health risks. To evaluate potential risks, we investigated the external and internal microbial flora of 61 cockroaches from a tertiary hospital in Ghana and evaluated the antibiotic resistance profiles of the common bacterial species. Standard methods were used in all the microbiolo...

Cockroaches were collected from hospitals, houses and poultry sheds in various parts of Isfahan (Iran) and identified to species. In total, seven species of cockroaches in seven genera were identified: Blatta lateralis, Polyphaga aegyptiaca, Arenivaga roseni and Parcoblatta spp. Three species Periplaneta americana, Blattella germanica and Supella longipalpa (Blattidae and Blattellidae) were mor...

Cockroaches were collected from hospitals, houses and poultry sheds in various parts of Isfahan (Iran) and identified to species. In total, seven species of cockroaches in seven genera were identified: Blatta lateralis, Polyphaga aegyptiaca, Arenivaga roseni and Parcoblatta spp. Three species Periplaneta americana, Blattella germanica and Supella longipalpa (Blattidae and Blattellidae) were mor...