Environmental Entomology (1989) 18, 306-314

D.J. Schotzko and L.E. O'Keeffe (1989)
Lygus hesperus distribution and sampling procedures in lentils
Environmental Entomology 18 (2), 306-314
Abstract: The spatial distribution, minimum number of samples, and number of sweeps per sample required to estimate populations of Lygus hesperus Knight (Heteroptera: Miridae) in lentils were determined from three plot types, using 1 to 25 randomly collected 180° sweeps with a sweep net. Overall, 92% of the adult populations and 85% of the nymphal populations had means less than the variance, indicating a negative binomial distribution. The negative binomial K appeared to vary over the season and with density of the adults. The number of sweeps per sample was inversely related to the K value of nymphs, whereas the density was directly related to nymphal K values. The slope for Taylor's power law appeared to be related to the adult density, although it was consistent for all nymphal densities in our experiments. On average, five 25-sweep samples were required for adult population estimates, and about 10 single-sweep samples were recommended for nymphal population estimates.
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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.
	Lygus hesperus	Lentil (Lens culinaris)