论文部分内容阅读
斯氏尖叶瘿螨的发育起点为5.373±1.39℃,有效积温为170.07±14.64日度。在21℃下,完成一代需11天。南京地区年发生22～23代。实验种群生命表的结果表明:净生殖率(Ro)为6.2496;世代平均周期为10.8357天;周限生长率为1.1843;内禀增长率(rm)为0.1691。光周期变化对此螨不会诱发滞育。33℃对卵孵化有影响,并导致孵化后大量死亡。35℃时卵不能孵化。成螨的过冷却点为—25.44±0.5℃。田间种群密度在1月下、5月下和10月下～11月中出现三次高峰,药剂防治在4月下～5月上和11月为宜。
Spodoptera frugiperda mites development starting point of 5.373 ± 1.39 ° C, effective accumulated temperature 170. 07 ± 14 64 days. At 21 ° C, it takes 11 days to complete a generation. Nanjing occurred in 22 to 23 generations. The results of the experimental population life table showed that the net reproductive rate (Ro) was 6.2496; the average generation period was 10.8357 days; the weekly growth rate was 1.1843; and the intrinsic rate of increase (rm) was 0.1691. Changes in photoperiod will not induce diapause on this mite. 33 ° C has an impact on egg hatching and leads to a large number of deaths after hatching. Eggs can not hatch at 35 ℃. The supercooling point of adult mites is -25.44 ± 0.5 ℃. The population density of the field appeared three times in January, May and October ~ November in November, and the pesticide control was in April ~ May and November.