Individuals of Bemisia tabaci are very small, adults are 1 mm long, white, and their wings are transparent, with small white powder. The appearance is very similar to the whitefly in the greenhouse, but is smaller than the whitefly, and the wings are more pronounced than whiteflies at rest. Roof shape.
The insects use adult worms and nymphs to suck plant sap, resulting in leaf chlorosis, yellowing, wilting and dead. They also secrete a lot of honeydew-contaminated vegetables to induce coal pollution, and more serious is the spread of tomato yellow leaf curl virus disease. The efficiency of virus transmission is extremely high. Once acquired, the virus can be continuously transmitted for more than 20 days. Bemisia tabaci was introduced into the Beijing area in the late 1990s. After the outbreak in 2000, since the fall of this year, it has once again been paralyzed in the suburbs of Beijing, causing a large area of ​​tomato leaf yellow leaf curl virus disease to spread in the autumn shed. Many sheds are almost Unexpected revenue and heavy losses.
At present, a large number of Bemisia tabaci have been transferred to protected areas, and the production conditions vary from area to area or between sheds. In order to reduce the source of insects and sources of poisons, and ensure the safe production of vegetables in the winter and the following year, each vegetable production area should be targeted at specific conditions. Living in winter, this insect can not spend the winter in the Beijing area outside the favorable opportunity to focus on scientific protection and control of tobacco whitefly.
1. Breeding and transplanting without insect seedlings. Bemisia tabaci breeding rate is very high, the number of population growth in geometric progression, therefore, no insect breeding seedlings in the cultivation and transplanting to reduce the base number, the full control of Bemisia tabaci and tomato yellow leaf curl virus disease is essential. Separate the nursery shed from the production shed and choose areas far from the occurrence of whitefly and virus disease, and focus on unified nursery to facilitate centralized management at the seedling stage. Thoroughly clear seedbeds and surrounding pests and weeds before breeding, and smoke with dichlorvos to reduce the insect source and intermediate host; suspend 1-2 pieces of yellow armyworm board to trap adult insects per 10 square meters of seedbed and reduce the transmission medium; Spray thiamethoxam, buprofezin, imidacloprid, acetamiprid, and other insecticides 3 days before planting to ensure that no insects are transplanted.
2, using physical control. By using the yellowishness of B. tabaci adults, yellow plates are suspended when B. tabaci has not occurred or just occurred, and every 5 to 7 meters is set. The yellow plates are to be adjusted as the plant grows, and remain at the plant growth point. The 10-20 cm above the site, and pay attention to stick insects and replace them in time to control the insect source, so that the population density is always controlled at a low level.
3, timely application of high efficiency, low toxicity insecticide. Focus on the critical periods of seedling raising, pre-transplanting, and post-transplanting population infestation. Select thiamethoxam (Aketai), buprofezin (buprofezin), imidacloprid, acetamiprid, avermectin Pharmacy sprays such as bifenthrin (Uranus) and fenpropathrin (malavera) can also be smoked with dichlorvos or isopropanol. Should be more in the early morning or evening when the adult lurking in the back of the leaves when spraying, should be sprayed three times, spaced 7 days or so, in order to control the trend of B.tofface, the best conditions for the use of normal temperature spray machine spraying. Do not use more than two consecutive doses of each drug. Be careful to mix or rotate medications to delay drug resistance. In order to improve the control effect, silicone additives can be added to the liquid.
4, pay attention to cultivation measures. Avoid mixed planting in the shed to facilitate unified management, unified prevention and control, and unified clean gardens to cut off the food chain; remove pests, leaves, and weeds in the field in time, and destroy them in a centralized manner; clear the gardens in time after harvest and close the sheds to fumigate with dichlorvos To kill remaining adults.
5. Conduct regional joint defense and joint governance. The tobacco meal is miscellaneous, the host is large, the migration is strong, and the liquidity is large. The regional unified prevention and treatment should be implemented to improve the overall control effect.
We mainly export European Chinese onions, garlic and ginger.
Fresh yellow onion and red onion size 60-80mm 70-90mm 90-110mm 10kg/net bag, 20kg/net bag or 25kg/net bag (2019 new crop onion)
Peeled yellow onion and red onion size 60-80mm 70-90mm 90-110mm 10kg / box, 20kg / box, filled with nitrogen, storage time of 90 days.
Frozen onion, frozen onion cube, frozen onion ring 10kg/box or 20kg/box Save for 2 years.
We also offer garlic, ginger and peeled garlic
Our onions have been sold in the Netherlands, the UK, Poland, and Italy, and the quality is very good.
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