Prevention and Control of Tomato Yellow Leaf Curl Disease
Yellow leaf curl virus disease transmitted by Bemisia tabaci is a devastating disease that seriously damages tomato, and has caused serious damage in a large area in 14 provinces (municipalities and autonomous regions) such as Shandong, Hebei, Henan, Anhui, Jiangsu, Beijing and Xinjiang. Threatening the sustainable development of the tomato industry in China. To effectively control its hazards and ensure the safety of tomato production, this plan is formulated.
Control measures
Partition prevention and control measures 1. Facilities vegetable production area. Priority is given to tomato varieties resistant to yellow leaf curl disease. Insect nets are used to cover and cultivate disease-free and strong seedlings, clean gardens before planting, yellow plates and insect nets throughout the growth period, and timely use of high-efficiency and low-toxicity pesticides to kill viruses. Body tobacco meal.
2. Open vegetable production area. The primary infestation source was cleared to cut off the transmission route, chemically control the transmission mediator B. tabaci, cultivate resistant varieties, and reasonably adjust the spatiotemporal layout of crops.
3. Tomato yellow leaf curl virus disease did not enter the area. Strengthen the detection of tomato yellow leaf curl virus which transports vegetables and flowers. Do not transfer vegetables or flowers from the diseased area to the non-occurring areas. The diseased plants should be quickly taken to prevent proliferation.
Key technologies
The selection of disease-resistant tomato varieties and varieties suitable for local cultivation against tomato yellow leaf curl disease are the most effective prevention and control measures. At present, tomato varieties resistant to chlorotic leaf curl disease include: Zhefen 701, Zhefen 702, Zheza 502, Zhe Yingfen No. 1, Suhong No. 10, Sufen No. 12, Sufen No. 15 and Jinling Tianyu ( Cherry tomato), Jiahong No.8, Hongbeibei, Shenfen V3, Shenfen V4, Jiali, Arkula, Jiamei, Ougong, Diffany, Qidali, etc., can choose suitable commodity traits according to market demand. The varieties, and pay attention to when planting varieties of tomato yellow leaf curl virus disease, strengthen the control of seedling stage and early post colonization of leaf spot disease.
Cultivate disease-free and insect-free seedling nursery sheds separately from production sheds. Completely remove the seedbeds and surrounding diseases, insects, and weeds before nursery. The nursery sheds can be sealed and fumigated with dichlorvos to reduce the source of insects and intermediate hosts. The cover film can also be used in high temperature seasons. High temperature stuffy way to remove the residual insect source. Use isolated net room nursery. The nursery bed is covered with a 50-60 mesh insect-repellent net to prevent the adults of Bemisia tabaci from moving in. One or two yellow armyworm swatches were hung for each 10m2 seedbed to monitor and trap and kill adult insects. If any adult of Bemisia tabaci enters the tomato seedbed, the pesticide should be used for prevention and control in time. The seedling seedlings were sprayed with thiamethoxam or imidacloprid for 2-3 days prior to transplanting (so that part of the liquid flow was leaked into the soil) to prevent the Bemisia tabaci to be brought into the planting shed during the operation.
One of the comprehensive prevention and control during the growth period is to cut off the intermediate host of virus transmission. Do not grow tomatoes, thin-skinned muskmelons, eggplants, peppers, sweet peppers, etc., around the tomato fields, so as not to become the intermediate host of whitefly and its spread virus. The second is to clean the garden before planting. 7-10 days before transplanting, the debris and weeds in the indoor and outdoor areas of the planting shed were cleaned. The third is the application of yellow boards and insect nets. 50-60 mesh insect nets are installed at the air vents and doorways to prevent the entry of tobacco fumes from the outside. After installing the insect nets, the dichlorvos can be used to seal and fumigate the smoke, thoroughly killing the nymphs in the shed, and then colonization and production to ensure no Colonization was carried out; after colonization, 1-2 pieces of yellow armyworm swatches were hung in the greenhouse for every 50m2 to monitor and entangle the whitefly adults. Fourth, close monitoring and early prevention and control of tobacco whitefly. After the planting, the insects were closely monitored. According to the yellow plate monitoring, the chemical pesticides were promptly controlled when the tobacco whitefly was found. The high-efficiency and low-toxicity chemical pesticides that can be selected include: buprofezin, imidacloprid, nitenpyram, avermectin, and thiophene. For worms, etc., the resistance of Bemisia tabaci should be strengthened so that medications can be changed. When spraying, it is advisable to spray insects in the early morning or early evening when they are lurking on the back of the leaves. The spray should be sprayed 3 times in intervals of 7 days. The safe interval should be strictly followed during the collection period. Timely removal of diseased plants in the field, cut off the source of Tomato yellow leaf curl virus.
Strengthen the management of seedlings transportation and dispatching Seeds and seedlings transferred from different places, especially seedlings transported from the affected area, must be sampled and tested to prevent transmission of virus seedlings.
Canned Apsaragus Spears,Apsaragus Spears Canned,Apsaragus Spears Tin,Apsaragus Canned Spears
ZHANGZHOU TAN CO. LTD. , https://www.zztancan.com