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Sequential Sampling for White Grubs1

Published online by Cambridge University Press:  31 May 2012

W. G. H. Ives  and
G. L. Warren
W. G. H. Ives
Affiliation:
Forest Entomology Laboratory, Box 6300, Winnipeg 1, Manitoba
G. L. Warren
Affiliation:
Forest Entomology Laboratory, Box 6300, Winnipeg 1, Manitoba
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Abstract>

The results of sampling to determine the vertical distribution of white grubs in the soil and the frequency distribution of grubs per 1-square-foot sample unit are presented. It was found that the optimum sampling period is during June and July, when most of the grubs are in the upper foot of soil. The negative binomial distribution with a k value of 1.5936 fitted most of the data well and was used to devise two sequential sampling methods: one for classifying white grub populations as light, moderate or severe; the other for pre-planting surveys to determine whether or not control measures are required.

Type
Articles
Information
The Canadian Entomologist , Volume 97 , Issue 6 , June 1965 , pp. 596 - 604
Copyright
Copyright © Entomological Society of Canada 1965

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