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Permanent URI for this collectionhttps://msuir.usm.md/handle/123456789/13419
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Item Eficacitatea Trichogramma evanescens westw în câmp în prezenţa substanţelor biologic active cu proprietăţi cairomonale la cultura de floarea soarelui(CEP USM, 2024) Gavrilița, Lidia; Nastas, TudorThe 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 prolificacy 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. 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. Testing in the sunflower field showed that the percentage of parasitism varied from. la 57.20- 64.28, control variant the percentage of parazitism varie from 10.45-20.47. (Td=2,5-4,8>1,96=To.o5).Item SOLUȚIE TEHNICĂ PENTRU REPRODUCEREA ÎN MASĂ A INSECTELOR BENEFICE(CEP USM, 2023) Gorban, V.; Gavrilița, LidiaThe device made in this work refers, in particular, to devices for the mass reproduction of beneficial insects, and can be used for the growth of parasitoids (eggs, larvae, imago). The technical solution represents a device made in the form of a vertical cylinder. Holes drilled in the lower part of this cylinder, are covered with capron mesh with smaller cells than the size of the breeded insects. The air periodically pumped by a fan, ensures an uniform air circulation throughout the section of the maintenance chamber. The biological material is attached on tapes with labels. Later, these tapes are loaded into the maintenance room and fixed on the support in a vertical position, so that the optimal conditions for the development of insects can be ensured.Item UTILIZAREA PROCEDEELOR DE SPORIRE A VITALITĂŢII ENTOMOFAGULUI TRICHOGRAMMA EVANESCENS W.(CEP USM, 2023) Gavrilița, Lidia; Nastas, TudorResearches have shown that the parasitisation percentage of Trichogramma evanescens in kairomone-treated variants is significantly higher than in the control and the comparison variant (alcohol 30%), because the biologically active substance serves as an entomophagous attractant. An important interest is the mode of examination of the interaction - phytophagous and entomophagous as the procedure which stimulates the Trichogramma to find its food sources. The entomophagous reacts to the host's chemicals, the so-called kairomones, which have high potential in regulating harmful insects. In order to carry out research on the behavior of the entomophagous Trichogramma evanescens W., the bean plants were treated with alcohol extract and eggs of cereal moth with kairomone (concentration of 30%), exposure of 5 min. In the variants treated with kairomone, where the action of the fractions extracted from the scales from the cereal moth was appreciated, on the search capacity of T. evanescens, its quality is higher than in the control.