Make good use of these measures to protect the greenhouse from insect pests
High temperature shed Before and after noon on a sunny day, the next day after watering, the temperature is 40 ℃ ～ 45 ℃ for 2 hours. Cucumbers, watermelons, melons, loofahs, bitter gourds, etc. like high temperatures, and the temperature in the shed should not exceed 45 ° C; hot peppers, tomatoes, eggplants, zucchini, etc., but have a slightly poor tolerance to high temperatures, and the temperature in the shed is best not Over 40 ℃. In the process of stuffy sheds, vents should not be opened to cool down, and only a few pieces of tombs should be used for shading and cooling. After the time of the stuffy shed is reached, be sure to slowly increase the air vent from the top of the shed to slowly decrease the room temperature. This measure has a certain auxiliary effect on controlling pests such as spider mites and whiteflies. Use insect nets and grass cloth Insect nets and anti-weed cloth isolate the outside and the shed transmission channels, so that pests can not enter the shed, thereby reducing pests and reducing the chance of pests transmitting diseases. Weeding cloth outside the shed is used for weeding, and the vents and doorways of the shed are covered with a layer of insect-proof nets to communicate with the outside world, which can achieve the purpose of isolating the shed. The mesh number of the mesh used should be determined according to the specific situation. Too dense is not conducive to ventilation and cooling, and too sparse is easy for small insects to enter and does not play a role in insect control. In general, a 60-mesh white insect net is appropriate. Use Sticky Bug Board The yellow sticky insect board can kill aphids and whiteflies, and the blue sticky insect board is mainly aimed at thrips. The sticky insect board should be adjusted at any time as the vegetables grow. When the armyworm board hangs, it is better to be 15-25 cm above the plant growth point. Bacteriostatic At present, there are more and more biological fungicides on the market, which can control root-knot nematodes, whiteflies, thrips, mites, cabbage worms and other pests. The most important point for biological inoculants to work is to ensure that the effective microorganisms in them can survive and reproduce. Therefore, their use technology is completely different from that of chemical agents. Vegetable farmers must not use biological agents for their experience in using chemical agents. The biggest difference between the use of biological agents and chemical agents: 1. Time of use: Chemical agents are mostly used in fine weather, and biological agents should be used in the evening and cloudy days when the light is weak. 2. Mixing: Most chemical agents can be mixed and used, and biological agents are best used alone to avoid antagonizing or killing beneficial bacteria. Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone Glucoside Powder,Spirulina Powder,Green Tea Extract Powder,Jujube Seed Extract Powder Shaanxi Changsheng Industrial Co., Ltd. , https://www.cncsbio.com