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大棚蔬菜病虫发生的主要条件是温度、湿度、菌源虫源、品种抗病性及栽培措施等,大棚蔬菜的生态控制就是通过以上生态因素的调控,达到减少化学农药用量,消除污染残留,从而使人们食用更安全,使病虫得到控制的目的。一、茄果类、瓜类灰霉病、疫病的生态控制 (一)温度条件的调控棚室温度低是茄果类、瓜类灰霉病等发生的主要原因。实践中,采用高畦双膜覆盖,棚室每3 m留一通风窗,晴天早揭草帘,下午及时盖帘。温度超过30℃及时放风。冬春季平均气温低于15℃时,关闭通风口以达到较好的保温效果。
Greenhouse pests and diseases are the main conditions of temperature, humidity, source of bacterial sources, disease resistance and cultivation of varieties, ecological control of greenhouses is through the above ecological factors in the regulation, to reduce the amount of chemical pesticides to eliminate pollution residues, So that people eat safer, so that pests and diseases control purposes. First, the eggplant, melon gray mold, ecological control of disease (A) the regulation of temperature conditions Low greenhouse temperature is the main reason for eggplant, melon gray mold disease occurs. In practice, high-fold double-film coverage, greenhouse every 3 m to leave a ventilation window, sunny early exposure to the straw curtain, cover the curtain in time for the afternoon. Temperature over 30 ℃ timely release. Winter and winter when the average temperature is below 15 ℃, close the vents in order to achieve better insulation effect.