Articles
BIOLOGICAL CONTROL OF DISEASES ON MAIN VEGETABLES – RESEARCHES AND PRACTICE IN MARITSA VEGETABLE CROPS INSTITUTE
Article number
830_73
Pages
511 – 518
Language
English
Abstract
The antagonists Trichoderma viride, Gliocladium virens, Enterobacter cloacae, saprofitic Pythium olygandrum can be use for seed treatment, soil introduction, pouring and sprays of plants for control of same important diseases on vegetable crops in protected facilities.
The results from investigations give an information related to the new effective strains- antagonists and technologies for their application in disease control.
The application of the biological products on base Trichoderma viride and Gliocladium virens with titre 2.1010 conidia per g at consumption rate 4 g/m2 before transplanting of pepper in the field decreased Verticillium wilt development in pepper by 42–59% and increased of yield by 26–42%. Effect of Trichoderma viride application against the development of Verticillium wilt on tomato in hydroponics is 40%. Efficacy of bio-products on base Trichoderma viride for application in period of planting in rate 4 g/m2 and 0.1% Poliversum (Pythium oligandrum) solution for seed treatment and spray on the vegetation for control of Fusarium wilt on greenhouse cucumber up 70%. Possibilities for biological control of powdery mildew (Sphaerotheca fuliginea, Erysiphe cichoracearum) and mildew (Pseudoperonospora cubensis) on cucumber by Enterobacter cloacae (J.) was studied.
Effect of the bacterial preparation application depends on the degree of the powdery mildew and downy mildew attack in the beginning of the vegetation.
In low values of the diseases in the planting – to 10%, the effect of fivefold spraying with bio-product was 88%. Soaking of seeds before sowing in bacterial solution of Enterobacter cloacae with titer 1.1010 cells/ml for 8 hour increased seed germination with 13–15% and reflect to growth of yield with 27%.
The results from investigations give an information related to the new effective strains- antagonists and technologies for their application in disease control.
The application of the biological products on base Trichoderma viride and Gliocladium virens with titre 2.1010 conidia per g at consumption rate 4 g/m2 before transplanting of pepper in the field decreased Verticillium wilt development in pepper by 42–59% and increased of yield by 26–42%. Effect of Trichoderma viride application against the development of Verticillium wilt on tomato in hydroponics is 40%. Efficacy of bio-products on base Trichoderma viride for application in period of planting in rate 4 g/m2 and 0.1% Poliversum (Pythium oligandrum) solution for seed treatment and spray on the vegetation for control of Fusarium wilt on greenhouse cucumber up 70%. Possibilities for biological control of powdery mildew (Sphaerotheca fuliginea, Erysiphe cichoracearum) and mildew (Pseudoperonospora cubensis) on cucumber by Enterobacter cloacae (J.) was studied.
Effect of the bacterial preparation application depends on the degree of the powdery mildew and downy mildew attack in the beginning of the vegetation.
In low values of the diseases in the planting – to 10%, the effect of fivefold spraying with bio-product was 88%. Soaking of seeds before sowing in bacterial solution of Enterobacter cloacae with titer 1.1010 cells/ml for 8 hour increased seed germination with 13–15% and reflect to growth of yield with 27%.
Publication
Authors
O.A. Georgieva, G.A. Georgiev
Keywords
protected facilities, disease management, bio-fungicides, antagonism
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