[Assessment of resistance to permethrin of german cockroaches (Blattella germanica L.) caught in Poland].

Resistance to permethrin was tested in cockroaches caught in health service institutions in various parts of Poland. The tests were carried out by the contact method as recommended by the WHO. The density of the insecticide was 20 mg/m2.

[House fly development after chitin biosynthesis inhibitor application to eggs].

Nine asymmetrically substituted ureas were bioassayed against house-fly (Musca domestica L.) eggs. The compounds included benzoylaryl urea derivatives, shown in Table I, (compounds 1 and 3-8) and benzoylheteroaryl ureas (2 and 9) which previously revealed effective inhibition of metamorphosis and reproduction when applied in food to the larvae and adults.

[Effect of selected compounds from the group of chitin synthesis inhibitors on insects of sanitary importance].

The effect of three aryl and heteroaryl dichlorobenzoylurea compounds as insect chitin inhibitors on sanitary important insects were investigated. These compounds were given insects: larvae and adults flies (Musca domestica) and cockroaches (Blattella germanica) with food. The best results on flies were after exposition to AG-6 and on cockroaches to AG-5.

[Review of the methods of control of pathogenetic arthropods of medical and veterinary importance].

Chemical and biological methods of the title arthropod pests control, during the past 1985-1989, have been reviewed. Among insecticides the chlorinated hydrocarbons, organophosphorous compounds, carbamates and particularly pyrethroids played still the outstanding role. Juvenoids, chitin synthesis inhibitors and semi-chemicals such as pheromones and feeding deterrents were discussed.

[Effectiveness of 2,6-dihalogenbenzoyl urea derivatives as potential inhibitors of chitin biosynthesis regarding the house fly Musca domestica L. and cockroach Blatella germanica L].

The biological activity was determined of 20 compounds from the group of asymmetrically substituted urea derivatives. They were derivatives of 1-(hetero)-aryl-3(2,6-dichlorobenzoyl)urea, compounds in Table 1, (1-12) which represented three groups of compounds: a) monochlorine or trifluoromethyl derivatives of benzene, b) monomethyl-substituted 2-pyridine derivatives, c) a derivative of 5-bromo-3-pyridine, and symmetrical derivates (Table 2 compounds 1-8) 2.2; 3.