随着各地蔬菜保护地种植面积不断扩大,种植年限不断加长,连作重茬严重。因而,近年来,各地大棚一些土传病害、线虫、白粉虱、蚜虫呈逐年加重的趋势。及时抓住棚室蔬菜播种(定植)前的间隙,对土壤进行处理,是提前预防各种病虫害的有效措施。 一、耕翻曝晒 保护地蔬菜收获之后应及时深翻曝晒,这样可将表土的病原菌、害虫卵、蛹翻入耕层底部,使其在缺氧的环境下窒息而死。同时又可把地下的杂草根茎、害虫的幼虫、蛹等翻到地表,使其干枯冻死。在撤除塑料薄膜之后的高温季节,深翻土 With the growing area of ​​vegetable conservation areas around the growing expansion of growing longer, continuous cropping serious. Thus, in recent years, some soil-borne diseases around the greenhouse, nematodes, whiteflies, aphids showed a trend of increasing year by year. It is an effective measure to prevent all kinds of pests and diseases in advance if we timely grasp the gaps before vegetable planting (planting) in the greenhouse and handle the soil. First, plowing the sun to protect the vegetables after the harvest should be timely deep inversion sun exposure, so that the topsoil pathogens, pests eggs, pupa turned into the bottom of the tillage, making it suffocate in hypoxia and died. At the same time, the underground weeds rhizomes, pests larvae, pupae and the like can be turned over to the earth surface to dry and freeze to death. In the hot season after the removal of plastic film, deep tipping