Effects of sublethal doses of contact insecticides on offspring production of different granary weevil populations | Efekti subletalnih doza kontaktnih insekticida na produkciju potomstva različitih populacija žitnog žiška
2010
Kljajić, P., Institut za pesticide i zastitu zivotne sredine, Beograd (Serbia) | Perić, I., Institut za pesticide i zastitu zivotne sredine, Beograd (Serbia)
The effects of prior contact of granary weevil (Sitophilus granarius L.) parents from a laboratory population, a Belgrade Port (Serbia) population (selected with LD70 pirimiphos-methyl) and a Bijeljina (Bosnia and Herzegovina) population (selected with LD70 deltamethrin) with filter paper treated with sublethal doses (LD20 and LD50) of the insecticides dichlorvos, malathion, chlorpyrifos-methyl, pirimiphos-methyl and deltamethrin on offspring production of the surviving insects in F1 generation (after 10 weeks) and F2 generation (after 16 weeks) in untreated wheat grain was examined under laboratory conditions. The results indicate that sublethal insecticide doses, apart from a significant decrease in their efficacy against treated granary weevil populations, may also provoke an increase in insect numbers in the following generations.
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