Andrii K. Interference bioinsectycydes based on Bacillus thuringiensis and biocenosis components of apple garden

In the thesis research results of interdependence between strains of B. thuringiensis with the components of biocenosis of apple garden, namely phytophagans, causative agents of diseases, plants of apple trees are presented. The high effectiveness of monitoring of numerosity of renal leaf roller, horticultural upper-side and cover leaf-miners and also apple lower-side leaf-miners in apple garden through the application of biological products based on entomopathogenic strains of B.thuringiensis is determined. It is shown that investigated entomopathogenic strains B.thuringiensis are antagonists of micromicetes – causative agents of frequent diseases of apple tree. It was found different by the level of influence negative impact of volatile secretions and extracts from the leaves of apple tree on the crops of entomopathogenic bacteria and determined that the strain B. thuringiensis 0408 is the most resistant to apple trees secretions, and the strain B. thuringiensis 0371 remain viability at the longest by the application on the leaves, which greatly increases their effectiveness of protective action. Water-soluble secretions of apple tree leaves, compared with volatile, influenced on the development of entomopathogenic bacteria crops in lesser extent, and the most resistant to them was the strain B. thuringiensis 0371. It is established that processing of apple tree plants using the preparations based on the strains of B. thuringiensis 0371, 0376 and 0408 that synthesize endogenous toxin and water soluble exotoxin, provides the receiption of fruit yield respectively at the level of 16,2; 17,3 and 18,1 t/ha, a preparation based on strain of B. thuringiensis 787, which does not synthesize exotoxin, contributes to harvest receiving at the level of 12,7 t/ha.