Ann. Entomol. Soc. Am. 81(3): 432-436 (1988) ABSTRACT The Asian cockroach, Blattella asahinai Mizukubo, a close relative of the German cockroach, B. germanica (L.), has been discovered in over 900 km from Tampa to Lakeland, Fla., and is prevalent in citrus groves, wooded areas, lawns, and homes. Differentiation of the two species is best accomplished by the diagnostic behavior of the Asian cock...

We model the dynamics of self-organized robot aggregation inspired by a study on aggregation of gregarious arthropods. In swarms of German cockroaches, aggregation into clusters emerges solely from local interactions between the individuals, whereas the probabilities to join or leave a cluster are a function of the cluster size. Rather than explicitly modeling the spatial distribution of robots...

A growing body of evidence has implicated allergens derived from cockroaches as an important environmental factor that may aggravate asthma in sensitized persons. We present the case of a 30-year-old man with asthma and a cockroach allergy. Allergy skin testing confirmed hypersensitivity to cockroach extract, and a home visit revealed visual evidence of infestation and the presence of Bla g 1 G...

German cockroaches have become a large problem in the Shenzhen area because of their pesticide resistance, especially to pyrethroid. A pyrethroid called "Jia Chong Qing" to prevent pests for a long time were found to be resistant to "Jia Chong Qing" with resistance index of 3.88 measured using RT-PCR and immunohistochemistry analysis showed that both CYP4G19 mRNA and CYP4G19 protein expression ...

BACKGROUND AND OBJECTIVES A field trial was carried out in cookhouses in an urban area to evaluate the efficacy of synthetic pyrethroid (0.02% deltamethrin + 0.13% allethrin) and propoxur aerosols (2%) in the control of German cockroaches (Blatella germanica). METHODS A total of six cookhouses were selected by simple random sampling method (two each for the two insecticide treatments and two ...

BACKGROUND & OBJECTIVES Cockroaches (Diploptera punctata) are basically tropical insects and will do their best to find a home that is both warm and moist. Their involvement in the transmission of tropical diseases is poorly investigated in Africa. METHODS A study on the bacterial, fungal and parasitic profile of cockroaches trapped in and around houses in Ekpoma was carried out using standar...

Here, I review the article "Changes in taste neurons support an adaptive behavior in cockroaches" by Wada-Katsumata et al. (2013). Their article elucidates the mechanism by which some cockroaches avoid eating poisoned bait: a change in the response properties of cells that transduce the tastant glucose and related sugars. Specifically, the data show that in cockroaches that avoid glucose consum...

Two mineral oils and 12 linear primary alcohols were studied, alone and in combination, to determine their contact toxicity to adult German cockroaches, Blattella germanica (L.) (Dictyoptera: Blattellidae). The more toxic oil, PD23 (LD50 = 1.45 mg per cockroach) was used for combination studies. Alcohols with carbon chain lengths of C3 and C8 through C12 were the most toxic, with LD50 values ra...

Imidacloprid a neonicotinoid insecticide was administrated by injection to newly emerged adults of the German cockroach Blattella germanica (Insecta, Dictyoptera) at 0.0002% and 0.0005% doses corresponding to the LD50 and LD90 respectively. The insecticidal effect of compound was investigated on ovarian growth during the first gonadotrophic cycle (0, 2, 4 and 6 days) under laboratory conditions...