Prevention and control of pests and diseases in large greenhouses, using traditional spray application methods, not only easy to increase the humidity in the shed, increase the occurrence and harm of pests and diseases, but also accelerate the spread of pests and diseases, so that pests and diseases spread rapidly, causing serious Economic loss. The use of the following three methods of application can not only make up for the drawbacks of the traditional spray application method, but also make the effect more fully, and it is simple and easy, economical, high-resistance, and effective. It is not suitable for phytotoxicity.
First, the hidden application method. That is, the insecticide and the sterilizing agent are processed into a seed coating agent, a tablet or a granule to be applied to the soil, and the crop is absorbed and transmitted to various parts of the plant through the root system, thereby achieving the purpose of controlling pests and diseases. This method does not pollute the environment, but also prevents phytotoxicity to other sensitive crops.
Tests have shown that the shed and indoor application by concealed application method have good control effects on aphids, mites, mites and underground pests.
Second, the smoke application method. That is to use special aerosols to ignite in the shed and indoors, and use the smoke that is filled in the air to kill pests and diseases. The commonly used aerosols in sheds and indoors are chlorothalonil and dichlorvos. It can be used to control sheds, indoor cucumber downy mildew, powdery mildew, tomato late blight, leek gray mold and cockroach and other vegetable pests. Applying this smoke application method, no need for any equipment, labor saving, economical convenience, uniform application, high control effect, good effect, it is not suitable for phytotoxicity to vegetables, can make smog fill the entire shed, room space, kill Destroy the disease hidden in the shed and any part of the room.
The test shows that the shed and indoor application method can be applied by the smoke application method, and the control effect can reach over 95%, and the control effect is high and stable.
Third, the dust application method. The medicinal agent is processed into a special form to make it a solid powder with a certain degree of fineness. It is sprayed on the shed and the room space by the powder spraying device, so that the shed and the room are covered with uniform floating dust and evenly deposited on the shed. All parts of the plant and the sheds and corners of the room to achieve the purpose of insecticidal sterilization.
Tests have shown that the application of dust application method, the drug's ability to spread is enhanced, the plant is uniform, the drug effect is low and the utilization is high, so the control effect is good.
China Pesticide Network Author: Feng deer
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