江苏地区设施蔬菜烟粉虱种群动态研究

The studies on population dynamics of Bemisia tabaci in greenhouse vegetable in Jiangsu province

分别对江苏苏北、苏中2个农区不同茬口(春提早、秋延后)以及苏中地区不同设施条件(日光温室、普通大棚)蔬菜烟粉虱种群动态进行系统调查,并利用农业气象资料对烟粉虱发生动态进行分析。结果表明:苏北地区春提早茬口设施蔬菜上烟粉虱5月上旬开始出现,6月上旬种群数量迅速上升,呈现出爆发趋势,7月中旬前后随着蔬菜收获结束,烟粉虱通过大棚通风口向露地寄主上迁移;秋延后茬口设施蔬菜上10月中下旬发现烟粉虱,11月上中旬出现虫量高峰,此后,随着气温的下降,虫量呈下降趋势。苏中地区春提早茬口设施蔬菜上烟粉虱从4月下旬开始发生危害,随着气温的上升,烟粉虱种群数量开始增加,5月下旬出现高峰;秋延后茬口设施蔬菜上,10月中旬发现烟粉虱成虫,10月下旬出现虫量高峰。不同设施条件下烟粉虱种群动态存在明显差异,日光温室内烟粉虱的发生量高于普通大棚,且持续时间较长。结果提示,设施内烟粉虱的发生时间和发生量与大棚温度有关。

The population dynamics of Bemisia tabaci in different crop stubble（early spring and late autumn）were investigated in the north and middle region of Jiangsu province.And its dynamics in vegetable from different equipment（heliogreenhouse and greenhouse）were examined in the middle region of Jiangsu.Ecological analyses of occurrence of B.tabaci were studied by agrometeorology data.The results demonstrated that the occurrence of B.tabaci in protected vegetable was in the early May in the northern region of Jiangsu.The amount continually increased in the early June,and it exhibited the trend of breakout.In the middle July,B.tabaci spreaded to the open field vegetables through air vent of greenhouse with the harvest of vegetable.Whiteflies were found in the protected vegetable in the middle and late October,and the peak was observed in the middle November.Then the amount decreased with the decline of temperature.However,in the middle area of Jiangsu,the B.tabaci were found in the late April,the amount continually increased with the increase of the temperature,and the peak was observed in the late May.Whiteflies were found in the protected vegetable in the middle October,and the peak was observed in the late October.The population dynamics of B.tabaci exhibited significant differences in different greenhouses.The number of B.tabaci in the heliogreenhouse was larger than that in the greenhouse,and it also had a longer duration.