Journal of Economic Entomology (1986) 79, 718-720

Marshall W. Johnson (1986)
Population trends of a newly introduced species Thrips palmi (Thysanoptera: Thripidae), on commercial watermelon plantings in Hawaii
Journal of Economic Entomology 79 (3), 718-720
Abstract: Population trends of a newly introduced species, Thrips palmi Karny, are reported on commercial watermelon plantings in Hawaii. Eight plantings were surveyed weekly for thrips on foliage and melon vine tips. Peak infestation levels varied from 2.5 to 53.6 thrips per leaf and from 18 to 97% infested vine tips per planting. Treatments of oxamyl appeared to reduce immature thrips densities, but did not affect adults. No correlation was found between thrips density on foliage and percentage of infested vine tips per planting.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Marshall W. Johnson

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thrips palmi		Japan
	Thrips palmi		Malaysia
	Thrips palmi		Philippines
	Thrips palmi		Taiwan
	Thrips palmi		Thailand
	Thrips palmi		India
	Thrips palmi		Pakistan
	Thrips palmi		Guam
	Thrips palmi	Tobacco (Nicotiana tabacum)	Indonesia
	Thrips palmi	Watermelon/colocynth (Citrullus)	U.S.A. (Hawaii)