Efficiency of the preparation based on Bacillus thuringiensis and nuclear polyhedrosis virus against diamond back moth (Plutella xylostella)

Abstract

Studies have been conducted to assess the effectiveness of bioinsecticide preparation based on the sporocrystalline complex Bacillus thuringiensis and the nuclear polyedrosis virus. Before the preparation usage, a significant excess of the economic threshold of harmfulness for the investigated pest was noted on the experimental area of 1 ha. In the first survey of the site, Plutella xylostella caterpillar numbers on one plant varied within 5-6 caterpillars range when 62% of white cabbage plants were settled. After 3 treatments with an experimental preparation, the number of caterpillars decreased to 98 sp./100 plants and biological efficiency was 80.4%. Also, the effectiveness of the biopreparation in comparison with chemical insecticides was proved by single-factor dispersion analysis (Fobs.= 9.05; Fcrit.= 5.98).

Journal of Water and Land Development

“…At the same time, the rational use of chemical, biological, and other methods of plant protection come to the fore, where the leading position belongs to the first method. In an integrated plant protection system, the chemical method is used both for preventing and upon the appearance of the problem [MATYJASZCZYK 2013;OSTAEV et al 2020;PELAEZ et al 2013;PLOTNIKOV et al 2020].…”