Abstract
The research conducted during the years 2020-2023 has demonstrated that in the experimental variant (in the presence of biologically active substances), the prolificity of Trichogramma evanescens females increased by approximately 1.4-1.5 times compared to the prolificity of females in the control variant. As a result, there is a quantitative saving of Sitotroga cerealella eggs in the reproduction process by 20-25%, and of the elite entomophage Trichogramma spp. by about 15-20%. The searching capacity of the entomophage Trichogramma evanescens, as a result of the influence of biologically active substances with kairomonal properties, showed results approximately 1.6 times higher in the control, indicating that females in the control move more slowly than in the experimental variant. The obtained results demonstrate a significant activation of the entomophage females in the presence of biologically active substances with kairomonal properties. Due to the influence of kairomonal substances, the females of the entomophage Trichogramma evanescens are more active in searching for eggs for parasitization, leading to approximately a 10% increase in the rate of parasitized eggs compared to the control variant. In the case of experiments conducted under field conditions, the action of kairomonal substances was confirmed to significantly increase the rate of parasitized eggs compared to the control variant (Td = 2.5-4.8 > 1.96 = T0.05). Biologically active substances play a crucial role in the biological protection of plants.