Because the temperature and humidity conditions in the plastic greenhouse are quite different from the external environment, the use of pesticides under conventional conditions is likely to cause phytotoxicity. To reduce the occurrence of phytotoxicity, the following points should be noted when applying herbicides in greenhouses: First, carefully choose herbicides. At present, there are many kinds of herbicides, and herbicides that are suitable for the road should be selected according to the type of crops in the greenhouse, the application time, and the object to be controlled. Second, strictly control the use of dose. The herbicidal effect of herbicides is closely related to the temperature, the temperature is high, and the herbicides have strong activity and are liable to produce phytotoxicity. The temperature in the greenhouse is obviously higher than the temperature in the natural state, and the temperature in the membrane may be very high. If the pesticide is applied in the natural state, the phytotoxicity is easily caused. Therefore, the application amount of herbicides in greenhouses should be reduced as compared with that in the natural state during the same period. Third, strictly control the use of concentration. In the past, when farmers applied herbicides, there was a habit of using less water and having too much concentration, which made it difficult to spray the pesticide evenly, which often resulted in excessive spraying at the place where the medicine was sprayed and caused phytotoxicity; Less than weeding effect. Therefore, when herbicides are used in greenhouses, they must be diluted as strictly as required to prevent excessive concentrations. Fourth, correctly grasp the application method. When using herbicides, uniform spraying should be used, and repeated application of pesticides should be strictly prohibited; for excessively dry land, the amount of water should be increased. It is better to sprinkle some water before application to increase soil moisture, which is beneficial to herbicide efficacy. The play. V. Remedy the injury in time. If herbicides are used improperly in greenhouses, they should be uncovered and ventilated in time to lower the temperature, change the microclimate in the greenhouses, and apply fertilizer and spraying plant growth regulators to promote the recovery of crops. 3D Hd Surgery Broadcast System 3D Hd Surgery Broadcast System,Medical 3D Hd Broadcast System,3D Surgery Broadcast System,Hospital Surgery Broadcast System NANJING TIANAO MEDICAL INSTRUMENTS MANUFACTURE CO.,LTD. , https://www.tianaomedical.com