نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش آموخته مقطع کارشناسی ارشد دانشگاه شاهد
2 عضو هیات علمی موسسه تحقیقات گیاه پزشکی کشور
3 عضو هیات علمی دانشگاه شاهد
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسنده [English]
In order to provide a phenological forecasting model, estimation of lower temperature threshold and thermal requirements are necessary. Therefore, current study was carried out to estimate lower temperature threshold and thermal requirements of Sesamia cretica Led. using common and Ikemto-Takai linear models. Developmental times of the corn stem borer immature stages were determined at five constant temperatures, 18, 20.5, 24, 27, 30 (±0.5)ºC, a photoperiod of 16L : 8D h and 50±10% relative humidity. Cut corn stems were used for feeding of the larvae. Between examined linear models, Ikemoto-Takai model was estimated thermal constant and lower temperature threshold for development of S. cretica more precisely than common linear model. Based on the estimations of Ikemoto-Takai linear model, lower temperature threshold of egg, larva, pupa and overall immature stages of S. cretica were 13.97, 13.45, 12.57 and 13.27 ºC respectively, and thermal requirements were 68.44, 328.73, 140.16 and 537.43 degree-days for above mentioned immature stages, respectively.
کلیدواژهها [English]