Environmental Entomology (1984) 13, 1015-1017

J.A. Mollet, J.T. Trumble, G.P. Walker and V. Sevacherian (1984)
Sampling scheme for determining population intensity of Tetranychus cinnabarinus (Boisduval) (Acarina: Tetranychidae) in cotton
Environmental Entomology 13 (4), 1015-1017
Abstract: The spatial dispersion of Tetranychus cinnabarinus was studied for 2 years in insecticide-treated and untreated cotton. Spider mite distributions and population density were not affected by the pesticides tested. The linear regression of log variance against log mean (r² = 0.95) provided a better fit to the data than did the linear regression of mean crowding on the mean (r² = 0.80). The former regression was used as a basis for a sampling plan designed to estimate population densities of T. cinnabarinus with fixed levels of precision.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Gregory P. Walker, John T. Trumble

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Tetranychus cinnabarinus	Cotton (Gossypium)	U.S.A. (SW)