1. The application method is based on the area and space of the medication, determine the amount of application, multi-point deployment. The site should be uniform, and use wire, bricks, stones, etc. to do the stent, the type of agent 20-25cm away from the ground, when the discharge should be lit from the inside of the greenhouse from the inside out in order, pay attention to blow out the open flame, so that normal smoke. Close the doors and windows of the shed immediately after the completion of the point, and after the first day of full ventilation, the agricultural operation can be performed. After spraying on a rainy day, it should be sealed for 4-6 hours before ventilating to prevent the body from poisoning.
2, the amount of drug application according to the size of the shed indoor space, the occurrence of pests and diseases, the effective content of smoke and other factors determine the amount of application. Under normal circumstances, the amount of common smoke agent once 0.3-0.4 g/m2. The prevention and treatment of diseases and insect pests should be started at the early stage of disease to facilitate early control. Generally once every 7-10 days, continuous control 2-3 times.
When the occurrence of serious diseases or insect pests or poor confinement of the greenhouse, the dosage may be increased or the application interval may be shortened. The tobacco production period can be used alone, but to delay the emergence of pathogens and pest resistance, improve the control effect, and promote the alternative use of smoke and spray.
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