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In in vitro tests, skin repellent IR3535, applied in the form of the Diffusil® H Prevental product in an aerosol bomb (active compound 20 %), killed 100 % of head lice (females and males) and nymphs 2 and 3, when directly sprayed at a dose of 0.94 mg of the active compound per square centimeter. Crawling lice exposed for 1 min on the filter paper impregnated by the same concentration showed no effort...
The cooperation and aggression between five laboratory colonies of Monomorium pharaonis were compared using an aggressiveness test and pupa-carrying test in laboratory arenas. The colonies were derived from field collections in different parts of Europe and USA. Generally, inter-colony aggressiveness was low and acceptance of pupae from other colonies was high. Workers from one colony (Lužiny, CZ),...
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