【摘要】 三化螟滞育的解除不必经一段时期的低温处理。水是滞育解除的先决条件。滞育幼虫只有在获得足够水分以后才能解除滞育。在25℃,光周期LD14:10条件下,滞育解除得以极大地促进,其临界化蛹前期为23～26天。15℃以上的有效温度的累积作用是滞育解除的主导因子,其群体临界有效积温约为267.5日度。更多还原

【Abstract】 It was not necessary to have a period of chilling for diapause termination in the paddy borer, but the diapauseof the borer would not be terminated until sufficient water had been taken in by the borer. Diapause termination in the borer was accelerated greatly by long day-length ( LD 14 : 10 ) at 25℃. At the temperature of 25℃ and photoperiod of LD 14 : 10 in December, the critical prepupal period was about 23 to 26 days.At 17-20℃ long day-length did not play signifcant accelerative role in the diapause termination. The cumulative action of effective temperatures above the developmental threshold ( 15℃) during the borer’s overwintering period was a major factor affecting diapause termination in the borer. The total effecive temperatures for the borer population were about 267.5 day-degrees.更多还原