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Control criterion of cabbage worm on autumn cabbage and use of sequential sampling plan


, : Control criterion of cabbage worm on autumn cabbage and use of sequential sampling plan. Journal of Agricultural Sciences, Jiangsu Academy of Agricultural Sciences 3(1): 37-42

An attempt was made to determine the economic threshold of Pieris rapae on autumn cabbage in Jiangsu, China, in 1983-84. Third-instar larvae were introduced onto cabbage plants in the field and leaf discs were removed to simulate insect damage. There was a negative correlation between larval numbers and cabbage yields and a positive correlation between the leaf areas cut off and loss of yield.

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