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秋末、早春种的大蒜和越冬后新长出的韭菜,往往成片地枯黄死苗。如扒根看,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、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,产萝繁殖后代——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,单用农药防治效果甚微。我们从去年试用草木灰和杀蛆油进行综合防治,效果很好。根据种蝇和葱蝇喜湿怕干的生活习性,早春种蒜时,先开沟,把适量的草木灰集中施到沟里,再种上蒜,后覆土盖沟。对越冬韭菜,如行距较宽,可在根旁两侧开沟,开
Autumn late autumn, the kinds of garlic and the winter after the new growth of leeks, often into patches of dead yellow seedlings. If you look at the root of the root, garlic and leek root full of maggots on the full of small white worms, which rely on eating garlic root, garlic and leek root, leek tillering 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 production of offspring offspring - maggots (Also known as species maggot, onion maggots). Many vegetable farmers feel thorny to control such underground maggots, with little effect of pesticide alone. We tried from last year’s ash and maggot oil comprehensive prevention and treatment, the effect is very good. According to the species flies and onion flies hi wet afraid of dry habits, early spring planting garlic, the first ditch, the amount of grass and ash concentrate applied to the ditch, and then planted on the garlic, cover soil cover ditch. Leek overwintering, such as wide line spacing, can be ditched on both sides of the root, open