Environmental Entomology (1992) 21, 731-736

Louis S. Hesler and Albert A. Grigarick (1992)
Aquatic arthropods in California rice paddies: effects of water-drainage versus continuous-flood regimes on abundance and species composition
Environmental Entomology 21 (4), 731-736
Abstract: In conjunction with experiments to evaluate water drainage as a control method for the rice water weevil, Lissorhoptrus oryzophilus Kuschel, studies were performed to compare the abundance and species composition of aquatic arthropods in two sets of continuously flooded and temporarily drained but reflooded rice, Oryza sativa L., paddies. A total of 1,736 individuals representing 22 arthropod taxa was collected. Few differences in abundance were detected; however, Notonecta spp. were significantly more abundant in reflooded paddies. Percentage similarity (PS) between paired treatments was >0.50 on all but one date; relatively high PS values on the first sampling dates suggest that the aquatic arthropod community is able to recover rapidly following reflooding. Several taxa appear to possess traits that enhance survival in a rice paddy subjected to temporary drainage. Implications are discussed for the wide-scale use of drainage on California rice acreage.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Lissorhoptrus oryzophilus	Rice (Oryza)	U.S.A. (SW)