Effect of Temperature and Relative Humidity on Development and Survival of Angoumois Grain Moth, Sitotroga cerealella (Olivier) (Lepidoptera: Gelechiidae) on Stored Maize
Keywords:
Temperature, Relative humidity, Sitotroga cerealella, survivorship, Fecundity, Longevity, Stored maize grainAbstract
The effects of different rearing temperatures (26oC, 30oC, 32oC and 35oC) and of different relative humidities (55, 65, 70 and 85 per cent) on the development and survival of Angoumois grain moths, Sitotroga cerealella (Olive.) were investigated on maize under laboratory conditions during the period from May 2013 to January 2014. Temperature was the main factor affecting egg incubation period, larval-pupal development time, and adult survivorship. The highest number of eggs was laid at 30oC (172.50/female). The shortest incubation period occurred at temperatures of 32oC and higher, but they increased sharply as temperature decreased. Larval-pupal development time was shortest at 30oC. Survivorship was optimal at 30-32oC, but decreased sharply at 26 and 35oC. Male longevity was significantly more (7.17 days) at 26
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