Progress in the Development of Sampling Plans for Bemisia tabaci: Evaluation of Binomial Sampling Methods

S. E. Naranjo, H. M. Flint and T. J. Henneberry


Preliminary binomial sequential sampling plans are reported for adults of Bemisia tabaci on cotton. These plans are based on counts of adults on the underside of fifth mainstem node leaves (counted from the terminal) taken during the 1993 growing season in central Arizona. Plans using tally thresholds (the predetermined number of insects present before a leaf is considered infested) of 1-6 were compared by evaluating error probability and average sample size curves. Sampling stop lines were calculated based on action threshold values of 5, 10 or 15 adults per leaf. Tentative plans are presented relating the cumulative number of infested leaves to the number of leaves examined as an aid for determining the need for population suppression.

Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pp. 875 - 877
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998