Journal of Pest Science (2004) 77, 145-150

M.X. Jiang, W.J. Zhang and J.A. Cheng (2004)
Reproductive capacity of first-generation adults of the rice water weevil Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae) in Zhejiang, China
Journal of Pest Science 77 (3), 145-150
Abstract: First-generation adults of the rice water weevil, Lissorhoptrus oryzophilus Kuschel were collected from Yueqing (28.1°N latitude, 120.9°E longitude), Zhejiang, China, during late June and mid-July and reared on rice plants (cultivar Shanyou 63) in the laboratory (28±1 °C, 16L:8D) to examine their reproductive capacity. On plants aged 16-22 days, adults from the field and collected in mid-July could reach oviposition onset more rapidly and deposit more eggs than those collected earlier. Adults that emerged in late June and early July displayed a greater tendency to become reproductive, compared with those which emerged in mid-July. However, each of these groups of adults, either field-collected or newly emerged, deposited only 3-14 eggs within 60 days of feeding. Reproductive capacity was greatly related to plant age, with plants aged below 20 days being most favorable; on plants aged over 20 days, reproductive development could take place, but little oviposition was observed. These results indicate that the reproductive capacity of first-generation adults in Zhejiang is dependent upon the time of adult emergence and post-emergence, as well as on the age of rice plants.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jia-An Cheng

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Lissorhoptrus oryzophilus	Rice (Oryza)	China (south)