Effect of Different Temperatures on the Rearing of 1st and 2nd Instar Larvae of the Cupreous Chafer, Anomala cuprea (HOPE) (Coleoptera: Scarabaeidae) in Decomposed Cow-Dung under Laboratory Conditions

概要

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The effect of decomposed cow-dung as diet on the rearing of the 1st and 2nd instar larvae of cupreous chafer, Anomala cuprea (HOPE) was studied under laboratory conditions at constant temperatures of 22℃, 25℃, 28℃, 30℃ and 32℃. Better growth and shorter larval duration, as well as lower mortality were observed at 30℃. Mortality was high at both the lower and higher extremities of temperature for 1st instar larvae but for 2nd instar larvae, an extremely high mortality was observed only at 32℃. Growth of the larvae gradually increased from the beginning of the experiment and body weight decreased slightly near the time of moulting at some of the temperatures. Some 2nd instar larvae showed retarded development and thus, entered the hiding phase for a longer period than the normal duration at all temperatures ; a significantly larger number of such larvae was observed at 28℃ and 32℃. Under such conditions, larval duration was approximately 3 to 4 times longer than the normal duration. At 30℃ and 32℃, all growth-delayed 2nd instar larvae died before completing their moults. Body weight did not change notably until the moult or death, but it was irregular at 22℃ and 25℃.
日本応用動物昆虫学会の論文
1995-08-25