Abstract
The effect of prolonged flooding on Globodera pallida (PCN) survival in a peat soil was measured at 5, 10, 15 and 20°C over a period of several months. After 14 wk there was a significant reduction in the viability of encysted eggs and, after 35 wk, effective control had been exerted at the two higher temperatures. The effect of anaerobic conditions at the same temperatures was tested without flooding, in an oxygen-free atmosphere; PCN survival was appreciably better than in flooded soil. Soil amendments that might allow much shorter periods of flooding were tested. Two rates of starch and calcium sulphate were added in combination to peat soil, followed by flooding for a period of 7 days at 15°C. PCN survival was negligible following treatment with both rates of starch and calcium sulphate addition and when subjected to a hydrogen sulphide atmosphere. The potential of such a system for PCN control is discussed.
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