n African Entomology - The effect of temperature on development and reproduction of the sugarcane stalk borer, Chilo sacchariphagus (Bojer 1856) (Lepidoptera : Crambidae)
|Article Title||The effect of temperature on development and reproduction of the sugarcane stalk borer, Chilo sacchariphagus (Bojer 1856) (Lepidoptera : Crambidae)|
|© Publisher:||Entomological Society of South Africa (ESSA)|
|Publication Date||Mar 2006|
|Pages||103 - 111|
|Keyword(s)||Biology, Chilo sacchariphagus, Reunion Island, Sugarcane, Thermal constants and Thresholds|
Development duration was measured for the spotted sugarcane stalk borer, Chilo sacchariphagus, under laboratory conditions at constant temperatures of 15 °C, 17 °C, 20 °C, 25 °C, 30 °C and 35 °C. Degree days (°D) and temperature thresholds, were determined: egg to adult 872 °D, eggs 114 °D above 13, 1 °C, larvae 586 °D above 12, 7 °C and pupa 172 °D above 13 °C. Development times were validated with field data. The highest proportion of mated females, 74% at 25 °C, was obtained with a male to female ratio of 2:1. No moths mated below 15 °C. At lower and upper temperatures tested mating success, fecundity and longevity were adversely affected. Females laid 254 eggs on average under laboratory conditions at 25 °C. The implications of these results are discussed with regard to the ecology, distribution, and control of this sugarcane pest.
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