河北省成立“粉尘剂防治温棚蔬菜病害开发协作网”近两年，全省温室大棚蔬菜种植面积迅速扩大，１９９４年已达４５万亩。主要蔬菜品种有黄瓜、番茄、韭菜、甜椒等，是首都北京的重要蔬菜基地。由于温室大棚内特定的高温、高湿密闭条件，这几年，温棚蔬菜病虫害发生严重，... In the past two years, Hebei Province set up a “Dust Control and Prevention Vegetable Leaf Disease Cultivation Network”. The planting area of ​​vegetables in the greenhouse increased rapidly in 1994 and reached 450,000 mu in 1994. The main varieties of vegetables are cucumbers, tomatoes, leeks, bell peppers, etc., is the capital of Beijing’s important vegetable base. Due to the specific high-temperature greenhouse conditions, high humidity closed conditions, over the past few years, greenhouse vegetable pests and diseases serious, ...