土壤是影响蔬菜病虫害的主要因素之一。连年耕种的菜田,土壤中常常残留有某些病毒和虫卯,因为多数菜田栽培作物品种单一,调节倒茬期较长,土壤温度相对较高。这些条件促使土壤中有害菌的增长,造成蔬菜 Soil is one of the main factors affecting vegetable pests and diseases. Year after year to cultivate the vegetable fields, soil often have some viruses and insects d, because the majority of cultivated vegetable crops a single species, regulating the downtime longer, the soil temperature is relatively high. These conditions promote the growth of harmful bacteria in the soil and cause vegetables