International Journal of Pest Management (2003) 49, 89-94
Mingxing Jiang and Jiaan Cheng (2003)
Effects of starvation and absence of free water on the oviposition of overwintered adult rice water weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae)
International Journal of Pest Management 49 (2), 89-94
Abstract: Impacts of starvation and the absence of free water during different developmental stages on oviposition of overwintered rice water weevil, Lissorhoptrus oryzophilus Kuschel, were studied under laboratory conditions. A period of 7-day starvation during early oviposition stage or 14-day starvation during the pre-oviposition stage led to a significant reduction in both fecundity and ovipositional period on rice seedlings. When adults encountered water absence, where leafsheaths of rice seedlings were exposed to air, at the pre-oviposition stage, they exhibited a fecundity and oviposition pattern similar to those reared on seedlings with leafsheaths submerged in water. However, exposure of leafsheaths beginning from the early oviposition stage resulted in an obvious suppression of oviposition and a great reduction in realized fecundity when leafsheath exposure lasted over 16 days. However, these adults could resume oviposition when the leafsheaths were submerged in water at 8 days after exposure, and fecundity reached a level equal to that under permanent submergence. When leafsheath exposure occurred at the mid-oviposition stage, oviposition was also repressed and fecundity greatly reduced even if leafsheaths were submerged at 8 days after exposure. It was concluded that overwintered rice water weevils were more tolerant to starvation and the absence of water during the pre-oviposition stage than during the early and mid-oviposition stages. Removal of levee vegetation and field drainage as potential cultural control measures for this pest in Zhejiang, China, were discussed.
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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
environment - cropping system/rotation
Pest and/or beneficial records:
Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
---|---|---|---|---|
Lissorhoptrus oryzophilus | China (south) |