Biotesting of entomopatogenic bacteria Bacillus thuringiensis against caterpillars of Pieris brassicae L.

Abstract

Currently, biological products occupy a special place in the protection of crops from pests. Microorganisms of various origins are used in the production of pathogenic biological preparations against crop pests. Bacteria of the genus Bacillus have pathogenic properties against harmful phytophages and phytopathogens. In this study, experiments were conducted to test the activity of collection strains of entomopathogenic bacteria from the Research Institute named after Zhazken Zhiembaev against cabbage white caterpillars and obtaining reisolates to preserve the viability of collection strains.

Obtaining environmentally friendly products is one of the most important tasks of agriculture. Microorganisms of various origins are used in the production of pathogenic biological preparations against crop pests. One of them is biological products made from entomopathogenic bacteria Bacillus thuringiensis [1].

Bacteria of the genus Bacillus have pathogenic properties against harmful phytophages and phytopathogens. Unlike pesticides, these drugs have a selective effect only on pests [4]. They are also harmless to humans, animals, beneficial insects and the environment. At the Kazakh Research Institute of Plant Protection and Quarantine named after Zhazken Zhiembayev released a domestic biological drug Akkobelek based on Bacillus thuringiensis with an entomopathogenic effect, covering a wide range of lepidopteran pests.

Cabbage white - Pieris Brassicae L. is widely distributed in the southern regions of Kazakhstan, the main pest of the cabbage family. During the growing season, up to three generations develop. It often damages white cabbage and cauliflower, as well as plants such as turnips, horseradish, rapeseed, mustard, and indau [5].