Abstract
The aim of the given paper was to estimate the effectiveness of biologically active substances with kairomone properties on the behavior of the entomophagy’s Trichogramma evanescens and Bracon hebetor in the vision of increasing the parasitism potential of different ontogenetic stages of pest development. Biologically active substances with kairomone properties were obtained and tested for increasing the biological indices of the entomophagy’s Trichogramma evanescens and Bracon hebetor. The alcohol-based extract and eggs of the laboratory host Sitotroga cerealella — as a source with kairomone properties for the entomophagy Trichogramma evanescens, and the alcohol-based extract from the larvae and excrement of the laboratory host Galleria melonella — as a source with kairomone properties for the entomophagy were used Bracon hebetor. It was found that due to the influence of kairomone substances, the female entomophagy’s Trichogramma evanescens and Bracon hebetor become more active in searching for eggs and larvae for parasitism, compared to the control variant. It has been demonstrated that biologically active substances, emitted by pest species for the purpose of communication between individuals of the same species, can also be used as kairomone substances by different species of entomophagy’s. The given factor can be further developed with the aim of application in plant protection as a means of activating and increasing the effectiveness of both released and natural entomophagy’s.
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