The use of bioproducts against leguminivora glycinivorella matsumura (lepidoptera, tortricidae)

Abstract

The current paper has presented the study results of the biological and economic efficiency of two biorational insecticides (ac.in. emamectin benzoate, 50 g/kg, and abamectin, 10 g/l) against the soybean moth Leguminivora glycinivorella Matsumura (Lepidoptera, Tortricidae). The current study was conducted under monsoon conditions at the FRC of Agricultural Biotechnology of the Far East named after A.K. Chaika. The plants were treated at a rate of 300 l/ha during bean formation. The soybean variety was ‘Briz’. The purpose of the study was to estimate the efficiency of biorational insecticides against the soybean moth L. glycinivorella in the southern Far East. There has been established that using bioinsecticides, soybean seeds and beans’ damage by the pest caterpillars was lower than in the control (by 1.6–1.7 and 2.0–2.3 times, respectively). According to the data, the biological efficiency of the pest control products ranged from 49.2 % to 55.9 %. The analysis of the economically valuable traits of soybeans has shown that the use of bioinsecticides has a positive effect on productivity. With the treatment, the number of beans per plant was 23.3–25.6 pcs., the number of seeds per plant was 57.5–62.3 pcs., and 1000-seed weight reached 203.2 g, exceeding the control by 2.3–4.6, 9.6–14.4 6 pcs. and 14.2–16.3 g, respectively. The use of insecticides resulted in a productivity increase of 0.4–0.5 t/ha.