Использование трех видов тлей при разведении хищного клопа подизуса

Abstract

Podisus maculiventris, the spined soldier bug, is one of the most promising entomophages for agricultural plants protection. Most often the larvae of Galleria mellonella are used for Podisus maculiventris rearing, but this method is rather expensive and sometimes not reliable. The comparative tests of 3 aphid species (Schizaphis graminum, Megoura viciae and Myzus persicae) as food for predatory bug nymphs have been conducted. The study used the following criteria: nymphs survival and developmental time; emerging bugs weight; preoviposition period duration; adult bugs fecundity and longevity; egg batches volume and number; egg viability. It is shown that the development and reproductive potential of predatory bug are decreasing in the majority of cases. However, an option to use aphids for spined soldier bug rearing has been found, namely feeding the nymphs until the 3rd instar, inclusively. The survival rate of nymphs was reduced by 20.6 % and the nymph development time was increased by 20–25 % but can be improved by predatory bug adaptation to the aphid diet during artificial selection. The other indicators of development and reproductive potential important for mass rearing of predator did not change significantly. A slight decrease in the viability of eggs is not practically important since the nymphs and adults feeding are most costly. in spined soldier bug mass rearing. Undoubtedly, a positive effect of predator nymphs feeding with aphids is the decrease of preoviposition period.