Effect of soil solarisation and mouldboard ploughing on black dot of potato, caused byColletotrichum coccodes |
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Authors: | F. D. N. Denner C. P. Millard F. C. Wehner |
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Affiliation: | (1) Agricultural Research Council, Roodeplaat Vegetable and Ornamental Plant Institute, Private Bag X293, 0001 Pretoria, Republic of South Africa;(2) Department of Microbiology and Plant Pathology, University of Pretoria, 0002, Republic of South Africa |
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Abstract: | Summary Preplant soil solarisation and mouldboard ploughing to a depth of 30 and 60 cm respectively were evaluated in two field experiments for the control ofColletotrichum coccodes causing black dot of potato. Solarisation reduced disease incidence by 45% when tarping was done for eight weeks and temperatures reached 56°C in the top 5 cm of soil. With a six week tarping period and lower maximum temperature (50°C) the reduction in disease was a nori-significant 25%. Mouldboard ploughing to a depth of 30 cm reduced black dot by 34% and was twice as effective as ploughing to a depth of 60 cm. |
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Keywords: | Solanum tuberosum L tillage |
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