Improvement measures for rice spraying technology

Rice pest control technology has always used low-concentration liquid direct spray method. This method has a large amount of water, and it is not ideal for controlling pests and diseases in the late stage of rice. In addition, this method uses mechanical sprays with high cost and difficult maintenance, which is difficult for a single household operator to accept. After many years of experiments, I have used the low-spray technology of concentrate to achieve good results. This method uses a common backpack sprayer, which can be used by every household. It saves 3/4 of the time compared to the low-concentration direct injection method, while the control effect is increased by 2.5%.

The "concentration" mentioned in the low-spray concentrate technology is to reduce the amount of water used to increase the concentration of the liquid. The original mu water consumption of 50 kg will be changed to 7 kg before the closure, 10 to 14 kg for the booting to the booting, and 28 kg for the late booting. "Low spray" means that when spraying, the nozzle is placed close to the tip of the rice leaf and at an angle of 45 degrees. Under the strong air current of the sprayer, the liquid flow is generated by the spray, and the rice tip is evenly rotated from the rice tip to the base of the rice bush. The rice plants are fully and effectively prevented.

The technical essentials of low-spray concentrate. The field block should have an operation ditch every 3 to 5 meters. The length of the spray bar should be 1.5 to 1.8 meters in order to spray the required distance on both sides; the joints of the sprayer and the pipe should not leak; It must be sufficient to make it have sufficient air pressure to form a strong airflow to generate a vortex; use a double nozzle or a 4 nozzle; in early operation, the hand must move fast, the air pressure is strong, so as to form a strong airflow; when spraying, the person should walk with the wind In order to prevent the liquid from being blown to the body by the wind; the variety of pesticides sprayed depends on the target of the control; when the height of the rice seedlings is 20-30 cm, the spray head should be sprayed 10 cm away from the tip of the rice leaf; when spraying, the foot walks and Keep the boom moving at the same speed. At the beginning, you must first do a test spray, that is, calculate the amount and area of ​​the sprayed liquid after spraying a distance, and try to control the dosage of the mu in the normal range. Other operations are the same as for general spraying.

Farmers Daily

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