Investigation On Vegetables Disease And Insect Pest In Plastic Tents And Three Main Diseases And Insect Pests Prevention Test In Wenzhou Region

Along with the agricultural structure adjustment, protected vegetable planting area has been increased year by year in Wenzhou region. Planting vegetables in plastic tents give priority to with solanaceous vegetable and melon vegetables, mainly including the tomatoes, eggplant and cucumber, etc. Planting area is further expanded.1.Through surveying mainly of vegetables in the vegetable planting base, the results show that the main diseases of harm the vegetables in plastic tents, includes cruciferous vegetables17kinds of diseases, wth the most serious diseases of cabbage downy mildew, soft rot disease, virus disease, and solanaceous vegetables30kinds of diseases, including the most serious diseases of gray mold and bacterial wilt; melon vegetables15kinds of diseases, including the most serious diseases of downy mildew and powdery mildew. This paper analyzes the characteristics of the disease occurs on the basis of investigation about disease types and harm. The results show that the characteristics of vegetables disease in plastic tents in Wenzhou region are that the rhizosphere diseases of vegetables in plastic tents are increasingly serious which make seriously continuous cropping obstacles; the diseases caused by humidity of vegetables in plastic tents are increasingly serious from the autumn later to spring which make seriously diseases at leaves and flowers; the diseases caused by high temperature; of vegetables in plastic tents are increasingly serious from the summer to autumn which make seriously diseases at leaves; some intermittent diseases become chronic diseases and physiological diseases are increasingly serious.2.The main pests of harming the vegetables in plastic tents includes more than20kinds of pests, which that leucoptera flies, whitefly and, thrips, red spider mite aphids, such as small aphids pests and maggots, grubs mole cricket, Agrotis ypsilon etc, underground pests are significantly advantage. This paper analyzes the characteristics of the pests occurs on the basis of investigation about pests types and harm. The results show that the types of vegetables pests in plastic tents in Wenzhou region including liriomyza sativae blanchard, thrips palmi karny, red spider mite aphids, underground pests etc which have already widely distributed in Wenzhou vegetable production and harm would further increase. White-flies some piece adistribution in Wenzhou are growting and spreading but harm is unclear. In addition to ryan, cangnan, suburbs, etc have heavier happened, but if not taken seriously, in recent years white-flies will rise for the first big pests of vegetables, very likely outbreak, and cause a variety of vegetables virus disease pop. In addition, with the expansion of the lettuce, cabbage cultivated area, the dangers of Phyllotreta striolata and snail pests are on the rise.3. The study of tomatoes and cucumbers main diseases, insect pest control test in plastic tents in Wenzhou region through the tomato grey mould medicament, the cucumber frosty mildew, the whiteflies medicament to guard against the effect experiment screens to pervents and controls the tomato grey mould to have well guards against the effect the medicament to have40%ShiJia happy,50%throws oneself Hydantoin,50%spoiled mildew advantage. Screens to pervents and controls the cucumber frosty mildew have well guards against the effect the medicament to have72.2%Pu to overcome64%kills poisonous vanadium. Screens to pervents and controls the Whiteflies have well guards against the effect the medicament to have1.8%abamectin.4. Accordding to the vegetables in plastic tents disease and insect pest occurrence characteristics and trends, and puts forward some suggestions vegetables in plastic tents the disease and insect pest pollution-free comprehensive prevention and control strategy.