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[9000728.] رقم البحث : 9000728 - |
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Effect of Some Bioagents, Fungicides and Fertilizers / |
| تخصص البحث : General |
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Agricultural Research Journal Suez Canal University / |
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M. N. A. Khalil |
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A. Seif El-Eslam |
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Bean, Phaseolus vulgaris, root rot |
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Bean is subjected to infection with damping-off and root rot diseases causing great
loss in seedling emergence and seed yield. Under laboratory conditions, the most effective
bioagent on decreasing linear growth and number of selerotica of Sclerotium rolfsii was T.
viride followed by Azotobacter chrococcum (genetically modified), Pseudomonas
fluorecense and Bacillus megaterum, respectively. While, A. chrococcum and Candida spp.
were the least effective ones. Under greenhouse conditions, the bioagent T. viride was the
most effective on reducing incidence and severity of the infection with S. rolfsii and gave the
highest crop yield followed by A. chrococcum; P. fluorecense and B. megaterum,
respectively. While, A. chrococcum and Candida spp. were the least effective ones.
The most effective fungicide on reducing the linear growth of S. rolfsii in vitro was
Ronilan followed by Vitavax/Thiram. While, Euparein and Switch gave the lowest effect.
Under greenhouse conditions, the same results were obtained using these fungicides against
damping-off disease.
Applying different levels of fertilizers (nitrogen, phosphorus and potassium) decreased
incidence of post emergence damping-off at different degrees. Using the previous fertilizers
at levels of 100:200:100 kg/feddan and 150:300:150 kg / feddan significantly reduced the
disease than the other levels. |
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