Application technology of smoker to control vegetable pests and diseases in protected areas

Fumigant (referred to as smoke agent) is an ideal dosage form for controlling vegetable pests and diseases in protected areas and producing pollution-free vegetables. It is necessary to actively promote the use of smoke agents to control vegetable pests and diseases in protected areas. In order to scientifically and rationally use the smoke agent in the production of vegetable in the protected area, according to the occurrence and damage of the main pests and diseases in the main vegetable producing areas of our county, through the practice test, the prevention and control methods of the tobacco pests in the protected area are summarized. The district applies reference in the development of vegetable industry.

1 Use smoke agent to choose 20% shed fungus smoke agent, 10% smoked smoker, 10% smoked and smoked smoke agent produced by the Pesticide Development Center of Gansu Academy of Agricultural Sciences. In the production of protected vegetable, 20% shed fungus can prevent downy mildew, gray mold, leaf mold, early blight, late blight, blight, powdery mildew, anthracnose, black spot, spot blotch, etc. Disease. 10% smoked and smoked smoker can control pests such as aphids, greenhouse whitefly, and Liriomyza (Lepidoptera: Lepidoptera). 10% smog smoker can prevent pests such as spider mites and two-spotted spider mites.

2 Prevention and control of shed bacillus smoker to prevent and cure vegetable diseases in protected areas, the best effect is applied before or during the early stage of the disease, and the systemic exposure of the system should be controlled by systemic therapeutic agents. For the control of aphids, whitefly, spotted fly and red spider, insecticides should be used in the initial or early stage of pests , and can also be applied at the peak. Only smoke or dust can be used to control pests and diseases when it is raining or raining.

3 The application time is best from about 6 pm and closed overnight. It is beneficial to the deposition of smoke particles and improve the control effect without affecting the farming operation.

4 Conditions of use Because the smoke agent is used as a carrier for the purpose of application, and the smoke has the characteristics of being easy to flow and spread, therefore, the use of the smoke agent requires strict airtight conditions, the room can not be damaged, and the doors and windows should be closed.

5 Application method: Place the smoke point evenly in the crop room between the greenhouses, and lay 5-6 pieces per acre, so that the cigarette package bag is inclined 45--60 degrees to the ground, and the fire is directly from the bottom with the open fire. After igniting, blow off the open flame to make it smoke normally. After the point is finished, quickly close the shed to stay overnight, and then ventilate the next morning to perform the farming operation.

6 The dosage is calculated according to the area of ​​the greenhouse and the size of the space. Generally, 300-400 grams of shed bacillus, 400-500 grams of smoked smoke, 400-500 grams of smoked smoke. When using small arch sheds and vegetable seedlings, the dosage should be reduced to avoid phytotoxicity. When pests occur, the dosage should be increased to improve the control effect; the sheds with poor sealing performance should also be appropriately increased to ensure the prevention. effect.

7 The interval between application and the number of applications should be applied once every 7-10 days, and the disease should be continuously used for 3 to 4 times. The control of whitefly, spotted fly and red spider should be used continuously for 2 to 3 times. Control the mites for 1 to 2 times. When the pests and diseases are severely affected, the interval between administrations can be shortened to 5-7 days.

8 Precautions 8.1 Tobacco is a flammable substance. It should be protected from fire, moisture, heat and water during storage and transportation. Avoid direct sunlight. It should be stored separately. It is strictly prohibited to mix with food, seeds, feed and fertilizer. Bake, should be dried before use. 8.2 After the smoke agent is ignited, the smoke will be swift, and the application personnel should leave the shed immediately; the smoke point should be more than 30 cm away from the crop, and should be kept away from combustibles. 8.3 The smoke agent should not be used in the open field, and the spray should not be diluted. 8.4 When using, pay attention to labor protection. Accidental poisoning should be sent to hospital for emergency treatment immediately. Pesticide is the first choice for biological pesticides with good effect, less residue and less pollution.