Ten measures for producing pest-free vegetables for pest control

First, the time to clear the park and the winter sun. Before we change the weeds, we should clean the weeds in the idyllic ditch and the ditch, freeze the weeds on the fungus eggs, and eliminate the wintering eggs in the soil. Second, choose pest-resistant varieties. There is a difference in resistance between varieties. When choosing pest-resistance varieties, care should be taken that they must be adapted to local consumption habits. High-resistant or multi-resistant varieties should be selected. For example, tomato variety Zhongza No. 9, Maofen 802, Belle, and Chinese cabbage varieties should be selected. Lvbao, Jinlu 75, Lubai 8, Beijing 80, cucumber varieties selected Jin study 2,4,6, Xiong 8th, eggplant selection Jijing 1, Long eggplant 1, Jinan early small long eggplant, Beijing eggplant. Third, reform farming system. Implementation of an integrated system of land use and land reclamation, rational rotation and intercropping. For a long period of continuous cropping, crops produce autotoxicity, such as watermelon, melon, cucumber, peas, soybeans, tomato, and stone cypress, which have strong self-toxicity, and continuous cropping can cause increased soil pollution. During crop rotation, rotation of crops belonging to the same family and genera is prohibited. During the replant period, crops and insect pests should be reduced and soil fertility should be reduced, and the relationship between land use and land conservation should be coordinated to achieve sustainable crop yield increase. Garlic and onion root exudates are fungicides and sows are sown in the fall. Fourth, a reasonable adjustment of the sowing date, to avoid the peak of childbearing and childbearing. Zucchini, tomato and Chinese cabbage avoid high temperature during seedling stage, which can reduce the virus disease. Insect nets and shade nets can be used to raise seedlings. Fifth, cultivate disease-free and strong seedlings. (1) Raising seedlings in different places or places. (2) mulching roots can be used nutrition pods, plugs, nutritious soil blocks nursery. (3) Strengthen the seedling management to improve the disease resistance of the seedlings, eliminate weak seedlings when transplanting, and ensure strong seedlings are planted. Sixth, grafting and raising seedlings. Grafting seedlings can prevent soil-borne diseases, enhance the growth of plants, and improve the ability to resist cold, drought, and salt. Grafting should take into account the affinity of the rootstock and scion, the resistance of the root system, the high yield and adaptability of the variety. Such as grafted watermelon with melon melon, black seed pumpkin as rootstock, cucumber with black seed pumpkin and the southern anvil number one as rootstock, eggplant with Toluubam as rootstock, tomato with Xinjiao number one as rootstock. The method of grafting is better by docking and plugging. Seven, optimize the vegetable field structure. (1) Proper close planting. (2) Hanging vines and brackets improve the ventilation and light transmission conditions, which can improve the quality and increase the output. The curved guava can be lifted and straightened with small stones. (3) Timely pruning. Cucumber can support tendrils and reduce nutrient consumption. VIII. Reasonably regulate the facilities environment. (1) Regulation of soil moisture and air humidity: Covering the mulching film and enhancing ventilation can increase soil moisture and reduce air humidity. (2) Gas regulation in protected areas: When organic fertilizers are insufficient, carbon dioxide fertilizers are applied. Under the condition of sufficient organic fertilizer, no carbon dioxide fertilizer is required, and the crop needs to have a carbon dioxide concentration of 800-1000 ppm. Frequent release of air and release toxic gases such as ammonia, ethylene, and sulfur dioxide. (3) Temperature and light control: According to different periods of crop growth, temperature and light control are performed. Nine, scientific agricultural management. (1) Promote ridge cultivation or sorghum cultivation. (2) Pay attention to the spread of viral diseases in field operations. (3) Pay attention to cultivator after watering or raining. (4) Rational fertilization, sub-irrigation and drip irrigation. (5) The use of hormones should be used with caution. Currently, the use of hormones such as qingsusu, 2,4-D, and triterpenic acid is strictly prohibited: estrogenic hormones are restricted or used with caution. The hormones that are allowed to use are GA and auxin. The use of the concentration can not be increased, the number of uses can not be repeated, otherwise it is easy to produce phytotoxicity. 10. Soilless cultivation or soil isolation can be used.

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