近年来,蔬菜地里,特别是保护地蔬菜线虫病日益严重。如何诊断?怎样防治?专家指出——前不久,很多农民反映,近年来,蔬菜地里特别是保护地蔬菜线虫病日益严重,几乎所有蔬菜,如黄瓜、苦瓜、西红柿、胡萝卜、茄子、马铃薯、甘薯、菜豆,甚至菠菜上都会发生。由于线虫病隐蔽性强,防治困难,农民减 In recent years, vegetable fields, especially vegetable nematodes, have become increasingly serious. Recently, many peasants said that in recent years, vegetables and groundwaters have become increasingly serious in vegetable fields. Almost all vegetables such as cucumber, bitter gourd, tomato, carrot, eggplant, potato, Sweet potatoes, beans, and even spinach will happen. Because nematode disease covert, prevention and control difficulties, farmers reduce