IMPACT OF CUCUMBER GENOTYPE ON THE DAMAGES CAUSED BY TWOSPOTTED SPIDER MITE AND EFFICIENCY OF BIOLOGICAL SPECIMENS

Due to the growing variety of vegetables, the impact of genotypic parameters of plants on pest resistance and efficiency of biological specimens is of high importance when selecting and creating new varieties and hybrids. The researchers found out the significant differences in stability of parental forms, hybrids and cucumber varieties of the Siberian selection in relation to twospotted spider mite. The paper finds out relatively resistant parental forms - ZhL-4 and GP-61/b, and also samples of the paternal form - GF-7 and a maternal line - ZhL-9 damaged by a phytophage in a strong degree have been defined rather steady against a phytophage. High acaricidal effect of Phytoverm was found on all studied varietal samples, however the most effective biospecimen restrained development of the pest on plants of  relatively resistant to phytophage of female line ZL-4. Reproduction of the twospotted spider phytoseiulus did not depend on genotypic features of parental forms, varieties and hybrids of cucumbers. The number of acarifages increased by 7.8-8.2 times in two weeks after appearance on the plants inhabited by spider mite in comparison with the initial number, as a result of which the damage rate of plants by the pest of most cultivars decreased, and in male forms practically did not change (GF-19) or slightly increased (GF-7). According to biochemical parameters, cucumber varieties with different degree of resistance to phytophage differed in dry matter content. Non-resistant to twospotted spider mite female forms LL-9, LL-12/1 and Nadezhda variety contained the lowest concentration of dry matter (5.4%), the highest amount of dry matter was observed in female line LL-4, which has the highest pest resistance (6.0%). Since the inherited traits are predominantly transmitted by the maternal component and the paternal form enhances these properties, it is important to assess not only the yield and flavour qualities but also the degree of resistance of parental forms to pests when selecting cucumber varieties and hybrids.

1. Kozlova E.G., Moor V.V. Zashhita i karantin rastenij, 2012, No. 12, pp. 16–18.

2. Ali S., Khalid S., Akhtar K., Khan M. et al. Preferential Influence of Wheat Genotypes on the Distribution Pattern and Population Dynamics of Cereal Aphids and Their Natural Enemies in Peshawar Valley. Pakistan journal of zoology. 2015, Vol. 47, pp. 223–233.

3. Kumar D., Yadav S., Saini V., Dahiya K. Impact analysis of genetically modified (Bt) cotton genotypes on economically important natural enemies under field conditions. Advances in Entomology, 2016, Vol. 4, pp. 61-74. DOI: 10.4236/ae.2016.42008.

4. Razdoburdin V.A., Kozlova E.G. Sovremenny`e problemy` immuniteta rastenij k vredny`m organizmam (Modern problems of plant immunity to pests). Abstracts of Papers, St. Petersburg: FGBNU VIZR, 2016, P. 124. (In Russ.)

5. Pavlyushin V.A., Vilkova N.A., Suxoruchenko G.I., Nefedova L.I. Materialy XV S``ezda Russkogo e`ntomologicheskogo obshhestva (Proceedings of the XV Congress of the Russian Entomological Society). Novosibirsk: Garamond, 2017, pp. 379–380. (In Russ.)

6. Tibebu B. Defense Mechanisms of Plants to Insect Pests: From Morphological to Biochemical Approach. Technical & Scientific Research. 2018, Vol. 2, Is. 2, pp. 0030–0037.

7. Andreeva I.V., Shtajnert T.V., Shatalova E.I., Shternshis M.V. Sibirskij vestnik sel’skokhozyaystvennoy nauki, 2012, No 1, pp. 31–37.

8. Axatov A.K. Prakticheskoe posobie po identifikacii kleshhej i nasekomy`x v ovoshhny`x tepliczax (A practical guide for identifying ticks and insects in vegetable greenhouses). Moscow: KMK, 2016, 94 p.

9. Ivanova G.P. Informacionny`j byulleten` VPRS MOBB №52 (Newsletter IDPRS MOBB No. 52). Proceedings of the Conference, St. Petersburg, 2017, pp. 135-138.

10. Zenkova A.A., Andreeva I.V. Zashhita i karantin rastenij, 2018, No. 11. pp. 12–14.

11. Ignat`eva T.N., Kashutina E.V., Bugaeva L.N., Andreenko O.N. Biologicheskaya zashhita rastenij – osnova stabilizacii agroe`kosistem (Biological plant protection – the basis for the stabilization of agroecosystems), Proceedings of the Conference, 2018, pp. 398–402.

12. Shternshis M.V., Shpatova T.V., Kuzneczova A.I., Tomilova O.G., Andreeva I.V. Agroximiya, 2006, No. 3. pp. 72–77.

13. Dolzhenko T.V., Dolzhenko V.I. Agroximiya, 2017, No. 4, pp. 41–47.

14. Sergeeva O.V., Dolzhenko T.V. Izvestiya SPbGAU, 2018, No. 2(51), pp. 89–94.

15. Mash`yanova G.K., Grinberg E.G., Shtajnert T.V. Ovoshhny`e kul`tury` i kartofel` v Sibiri (Vegetables and potatoes in Siberia), Novosibirsk, 2010, 523 p.

16. Andreeva I.V., Tomilova O.G., Shternshis M.V. Pautinnyy kleshch. Biologiya i mery bor’by (Spider mite. Biology and control measures ). – Novosibirsk, 2000, 12 p.

17. Gosudarstvennyy katalog pestitsidov i agrokhimikatov, razreshennykh k primeneniyu na territorii Rossiyskoy Federatsii (State catalog of pesticides and agrochemicals approved for use on the territory of the Russian Federation), Moscow, 2017.