Alternate ricefield hosts of Angoumois grain moth
1988
Dakshinamurthy, A. | Regupathy (Tamil Nadu Agricultural Univ., Coimbatore (India). Entomology Dept.)
The angoumois grain moth, Sitotroga cerealella is an important pest of rice, wheat, barley, millet, and maize. Field infestation is carried to storage, where it causes severe losses in quality and quantity. Ten panicles/plot were collected randomly from 6 fields of sorghum, pearl millet, and maize 1 wk before harvest Jan-Feb 1986. Ten 100-g samples of rice were collected from 12 plots at harvest and at threshing. Hundreds of panicles of weeds on ricefield bunds were collected from 10 plots. The samples were stored in plastic containers in the laboratory and moth emergence observed after 1 mo. Field infestation was found in rice, sorghum, maize, pearl millet, and the weed Echinochloa colona. The occurrence of S. cerealella on pearl millet and E. colona are records of field infestation. The number of moths that emerged was highest in pearl millet (26-32/panicle), followed by sorghum (18-20) and maize (6-12). Moth emergence in rice was 3-8/100 g. The lowest number of moths (4/100 panicles) emerged in E. colona, and they were very small (1.0-1.5 mm long).
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