عنوان مقاله [English]
The corn stem borer, Sesamia cretica Led. (Lep.: Noctuidae),is the most important pest of maize and sugarcane throughout the world including Iran where its egg parasitoid wasp, Telenomus busseolae Gahan (Hym.: Scelionidae) is widely used in biological control programs. Due to the host specificity of the parasitoid wasp, S. cretica serves as the single host for the mass rearing of T. busseolae at the laboratory or insectarium. The present work was intended to find the optimum temperature and photoperiod for the reproductivity of S. cretica at laboratory condition. We evaluated the percentage of fertilized eggs, oviposition rate, peak of egg laying and adult longevity of S. cretica. Thermal treatments and photoperiod treatments included 24, 27 and 30 ºC as well as 24D, 12D: 12L, 8L: 16D (short day period), 16L:8D (long day period) hours respectively. The best temperature for oviposition was calculated between 24 and 27 ºC, but the rate of oviposition was significantly decreased at 30 ºC. Temperature and photoperiod had no effect on the percentage of fertilized eggs and adult longevity. Different photoperiods caused significant effect on the rate of oviposition and the highest oviposition rate occurred in 12L: 12D hours and in 16D:8L hours. The lowest rate of oviposition was observed in 24D period. The highest rate of oviposition occurred on the second day.
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