After the summer, the outside temperature rises. In order to ensure the temperature in the shed, greenhouses often open vents day and night. This year, the weather is relatively dry and there are many pests. With the arrival of summer, the peak period of pest growth and reproduction has also come. In order to prevent pests from entering the greenhouse and harming crops, it is recommended that vegetable farmers set up pest control nets in time to prevent pests from entering the shed. After the greenhouses are installed on insect nets, they effectively block insects from entering the sheds and endanger crops. Especially for growers who grow tomatoes, pest control nets must be set up during this period to prevent pests from entering the shed and transmitting viruses. According to statistics, in the greenhouses where tomatoes were used for planting insecticide nets, the virus incidence was only 0.3%; in contrast, the incidence was as high as more than 30% in contrast areas without pest control nets. In May and June of each year, it is the peak period of transmission and spread of pests. If locusts in wheat fields occur seriously, if no insect nets are installed in the sheds, a large number of locusts fly from the fields into the sheds, and the breeding speed is astonishing. In addition to directly harming vegetables, locusts transmit virus diseases and can spread a variety of viruses. . As recently reported by a vegetable farmer in Qingzhou, several strains of virus-infected plants were found in the shed half a month ago. There were no locusts in the shed. Therefore, it is recommended that vegetable farmers set up pest control nets as soon as possible before the outbreak of pests. The number of net yarns to be used should be determined according to the specific circumstances. Too dense and unfavorable ventilation will reduce the temperature. If it is too sparse, the insects will easily enter and the pest control effect will not be achieved. Under normal circumstances, a 40-60 mesh white insect net is appropriate. In addition, to do a good job in the weeding work around the shed, the dead leaves and rot must be cleared out of the shed to reduce the host of locusts, whiteflies and other pests, to prevent pests from staying and staying around the shed. Also pay attention to the yellow sticky board installed in the shed, and spray insecticides such as acetamiprid, buprofezin, abamectin, etc. to prevent pests from diving into the shed and breeding harms. Tylvalosin Tartrate,Tylvalosin Premix,Tylvalosin Veterinary Drug,Tylvalosin Tartrate Pig Shandong Shengli Bioengineering Co., Ltd , https://www.shenglipharm.com