Watermelon seed production company, within the territory of China, gansu province, ningxia province, yunnan and other places have a watermelon seed production base, breeding area of 2000 mu, the annual watermelon seed volume of 20 tons, seed production, according to international standard products for all seed purity Watermelon Seeds,Hybrid Watermelon Seeds,Seedless Watermelon Seeds,Watermelon Seeds For Planting Ningxia Zhongqing Agricultural Technology Co. Ltd. , http://www.zq-vegetableseeds.com
Apply pesticides in a timely manner
First, timely medication is the key to rational drug use. 1. According to the different characteristics of each growth period of pests, timely medication. With the growth of insect pests, the resistance of vegetable pests has also increased again and again. The optimal period of pesticide pesticide application should be before the third instar larvae; for borers, such as cotton bollworm, borer, spotted fly, onion thrips and other pests, the appropriate period of application should be at the peak of hatching; adult stage Sex attractant can be used to kill, the effect is obvious. 2, according to different climates to choose the best period of medication. The control effect of many pesticides is closely related to the temperature, such as trichlorfon, dimethoate, and phoxim, whose control effect increases with increasing temperature within a certain temperature range. Therefore, the temperature of such pesticides is relatively high. When medication is high. Pyrethroid insecticides such as kungfu, flumethrin, bifenthrin, cyfluthrin, etc., have better efficacy at lower temperatures. Therefore, such pesticides should be administered in the morning and early evening. Insecticides, fungicides, herbicides, and growth regulators that have the function of attracting and transporting, when the light in the field is weak, the temperature is low, and the relative humidity of the air starts to rise, the chemical is less volatile, and most of it can be absorbed by plants. The effect of control is good, so these agents should be used in the afternoon or evening. Microbial insecticides are sensitive to light and humidity and should be selected when there is more fog or more dew. 3, according to the different characteristics of the disease hazards of vegetables, choose the best period of use of fungicides. Disease control should be carried out before the disease is the most hazardous and yield loss is heavy. When applying a protective bactericide, the drug should be applied before the bacterium infects the crop. 4. Choose the best time according to the effect of cultivation and management after medication. When using drugs in winter greenhouse production, in order to maintain the temperature of the greenhouse and reduce the humidity of the air, medications should be taken in sunny mornings or at noon, and after the work, ventilation and dehumidification are facilitated. Vegetables are cultivated in the open field to avoid the use of drugs before rainfall and to prevent the rain from diluting the liquid. Second, the law of medication. At present, pesticides produced in China or imported from abroad are mainly based on emulsifiable concentrates; bactericides and herbicides are mainly based on WP. Therefore, the current spraying method in China is mainly based on spraying, followed by shaking, dusting, dusting, and spreading poisonous soil. Different application methods can be selected according to different situations. 1, control underground pests. Prevention and control of underground pests can be used for shaking, poison baits, toxic soil, irrigation roots, soil treatment and other methods. 2, to prevent seed bacteria. The seed can be treated with medicaments, soaked in warm soup, and the like. 3, medication in the production of protected areas. The currently used methods of spraying are spraying and igniting aerosols. (Wu Shenqiu)