Non-chemical Control of Potato Early Blight Caused by Alternaria alternata | ||||
| Catrina: The International Journal of Environmental Sciences | ||||
| Article 14, Volume 1, Issue 2, 2018, Page 103-109 PDF (305.64 K) | ||||
| Document Type: Original Article | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Omar Abdul Wahid  1; Ismail Ismail2; Ahmed Abo-Esha3
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| 1Department of Botany, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt | ||||
| 2Botany Department, Faculty of Science, Cairo University, Giza, Egypt | ||||
| 3Department of Microbiology, Soil, water and environmental Research Institute, Giza, Egypt | ||||
| Abstract | ||||
| Early blight of potato caused by Alternaria alternata (Fries) Keissler is one of the factors that affect potato production. Using chemical control to reduce disease severity represent another risk for agriculture. Biological control, using microorganisms, as well as plant extract and compost are safe measures that give reliable control. Applying either measure of control reduced disease incidence to less than 2% during two successive seasons. Microbial spray of diseased potato reduced the disease to various extents. Trichoderma sp. was the most effective among all tested microorganisms, followed by Penicillium sp. On the other hand, alcoholic extract of three plants was more effective than their water extract. However, water extract showed highly significant reduction of disease incidence. Polygonum gave the highest reduction of disease incidence in both cases. Also water extract of compost greatly suppressed early blight when applied as spray to potato leaves. Duration of extraction may affect the ability of compost extract to suppress disease. All results were comparable to that of fungicides. | ||||
| Keywords | ||||
| Trichoderma; compost; plant extract; potato blight; non chemical control | ||||
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