EVALUATION OF EFFICACY OF BACILLUS THURINGIENSIS STRAINS AGAINST PLUM APHIS - HYALOPTERUS PRUNI (GEOFFR) (HEMIPTERA: APHIDIDAE) IN LABORATORY AND FIELD CONDITIONS

28.06.2023 International Scientific Journal "Science and Innovation". Series D. Volume 2 Issue 6

Alamuratov Rayimjon Abdimurot ugli, Pulatov Zarip Aslamovich

Abstract. In the conditions of currently observed environmental changes, biological control is considered as the most promising tool and strategy of sustainable agriculture, because it has economic and ecological advantages. Therefore, Bacillus thuringiensis bacteria isolated from infected and dead insects against Hyalopterus pruni were tested in laboratory and field conditions. In laboratory conditions, strains Bt-26 and Bt-1Fo killed 100% of H.pruni by day 14, while strain Bt-1 showed 86,7% efficiency. In our field experiments, strains Bt-26, Bt-1, Bt-1Fo showed efficiency higher than 80,0%. In the article, the use of microorganism strains with insecticidal effect for biological control in agriculture can be a scientific and practical solution against Diptera pests.

Keywords: plum sap, pest, leaf, parthenogenesis, imago, larva, Bacillus thuringiensis, bacterium, spore, crystal, toxin