秋末、早春种的大蒜和越冬后新长出来的韭菜,往往成片地枯黄死苗。这是什么原因呢?扒根看在蒜根和韭根上全围满了蛆一样的小白虫,它们专门靠吃蒜根蒜头和韭根及韭菜分蘖节生活。这些小蛆虫是一种叫种蝇和葱蝇的小苍蝇,将卵产在蒜、韭根际土壤和粪肥中繁衍成灾的。大蒜的鳞茎和茎叶中含有一种油脂性的挥发液体——硫化丙烯,它不断向空气中挥发,而种蝇,葱蝇喜欢这种气味,便前来交尾,产卵繁殖后代——蛆虫(又称种蛆,葱蛆)。很多菜农对防治这种地下蛆虫感到棘手。用农药防治,药量、浓度不易掌握,怕发生药害。去年我们 Autumn late autumn, the kind of garlic and long after the winter out of the leeks, often into patches of dead yellow seedlings. What is the reason? Roots and roots in garlic and leek root full of maggots on the full of small white worms, they rely on garlic and garlic leek roots and leek tiller Festival life. These tiny maggots are small flies called flies and onion flies that multiply in eggs, leek rhizosphere and manure. Garlic bulbs and stems and leaves contain a greasy volatile liquid - propylene sulfide, which constantly volatile to the air, and the kinds of flies, onion flies like this smell, they come to the end, the spawning offspring - maggots (Also known as species maggot, onion maggots). Many vegetable growers are struggling to prevent such underground maggots. Pesticide control, dose, concentration is not easy to grasp, afraid of phytotoxicity. Last year we