Effect of diet, photoperiod and cold on Eurygaster integriceps Puton diapause (Hemiptera: Scutelleridae)

摘要

 Sunn pest (Eurygaster integriceps Put.) (Hemiptera: Scutelleridae), is a serious pest of cereals causing severe quantitative and qualitative by feeding on leaves, stems and grains. Aim of the current study was to evaluate the effect of photoperiod and diet on the Sunn pest diapause. Thus, the effect of two photoperiod conditions including short day (8 L: 16D) and long day (16L: 8D) and two diet including wheat grains and growing wheat plants on stadium duration, gonad size and haemolymph protein concentration was examined. Also, to extend our studies the effect of cold on gonad size and haemolymph protein concentration was studied. Results showed that stadium duration in short day photoperiod condition (31.43 days) was shorter than long day photoperiod condition (38.58 days) (P