According to the amount of pesticide liquid sprayed per mu (667 square meters), the statistical spray method of pesticide nets is often divided into high-volume spray, medium-volume spray, low-volume spray, low-volume spray and ultra-low-volume spray. API609 butterfly valve, EN593 butterfly valve, double eccentric butterfly valve, trple eccentric butterfly valve, high performance butterfly valve, metal to metal seat butterfly valve, Lug butterfly valve, wafer butterfly valve, Flange end butterfly valve, BW ends butterfly valve, 17-4PH shaft triple eccentric butterfly valve, pnuematic actuated butterfly valve, fire-safety butterfly valve Wafer Type Butterfly Valve,Triple Offset Butterfly Valve,Lug Type Butterfly Valve,Butterfly Valve Types SUZHOU RSF VALVE CO.,LTD , https://www.rsf-valve.com
1. High-capacity spray High-volume spray, also known as coarse spray, mostly adopts 16-type backpack-type manual sprayer and 36-type motorized sprayer. The spray liquid per acre (667 square meters) exceeds 40 liters, mostly 50-75 liters. The pesticide is diluted with water, the concentration of the liquid is less than 1000 mg/dg, and the median diameter of the droplet is 400-1000 microns. It is a targeted spray method. The high-capacity spray is suitable for controlling the plant-based pests and diseases in the abundant agricultural areas and for solving the weeds in the soil. It also has good control effect on the leaf-faced pests, but the droplets are prone to bouncing, rolling leaves, pesticides. Lost more, causing soil and water pollution.
2, medium-volume spray medium-volume spray, also known as constant spray, is the use of workers and peasants 16 type backpack-type manual sprayer and 552-C shoulder-mounted manual sprayer pesticide application, the spray nozzle aperture is 1.3-1.6 mm, the liquid medicine to The water is diluted at a concentration of 1000 mg/kg or more, and the spray volume per acre (667 square meters) is 12.5-50 liters, and the median diameter of the droplets is 250-400 micrometers. It is also a targeted spray. Medium volume spray is also used in multi-water areas, and pesticide utilization is higher than high volume spray.
3, low-volume spray low-volume spray, also known as fine spray or mist. Fine spray is applied to workers and workers of Type 16 and 552-C sprayers, and the spray head is equipped with a 0.7-1.0 mm spray aperture. It is often called mist to use a Dongfanghong 18 motorized sprayer to spray a liquid into a mist using a high-speed air stream. The low-volume spray is diluted with water, the concentration of the liquid is 0.8-3%, the amount of liquid sprayed per acre (667 square meters) is 2.5-1.2 liters, and the median diameter of the droplets is 150-250 microns. The spray method combined with the spray and the drift spray can avoid the bounce and roll scene caused by the large droplets, and the dispersion of the droplets between the plants is good, and the effective droplet coverage density standard for controlling pests and diseases can be achieved. It also teaches the plant's internal absorption and penetration of pesticides, as well as the plant's own breathing, (transpiration, physiological spitting and other functions, so that pesticides can play a role in re-dispersion. Low-volume spray is suitable for controlling crop leaf pests and diseases. Good control effect The advantages of thrifty pesticides, but not suitable for chemical weeding. Because of the high concentration of pesticides, this method of spraying cannot be adopted for highly toxic pesticides.
4, very low-volume spray very low-volume spray, also known as micro-spray, is the use of Dongfanghong 18 motorized sprayer, with water or oil as the carrier, pesticide concentration of 3-10%, spray volume per acre (667 square meters) It is 0.5-2.5 liters and the droplet diameter is 80-150 microns. It is a drifting cumulative spray. It is suitable for large-scale control of pests and diseases in areas with less water, and is not suitable for chemical weeding in farmland. The micro-spray has the advantages of being resistant to rain and scouring, and has a long-lasting effect. However, it is greatly affected by the gas, the mist drift is lost, and the application technique is relatively majestic. It is easy to cause crop phytotoxicity and poisoning of humans and animals, and is not commonly used in pest control.
5, ultra-low-capacity spray ultra-low-volume spray, also known as micro-spray, is the use of Dongfanghong 18 motorized sprayer plus ultra-low-capacity spray nozzle, oil or water as the carrier, pesticide concentration of 10-60%, per acre ( 667 square meters) spray volume of 0.15-0.5 liters, the median diameter of the droplets is 15-75 microns, is also a drifting accumulation of spray. China Pesticide Network believes that it is suitable for use in areas with less water, to prevent and control explosive pests and diseases, and not to be used for chemical weeding in farmland. It has the advantages of high work efficiency, thrifty pesticides, timely prevention and no water use, but the operation technique is majestic and the droplets are greatly affected by the air flow. Improper application will cause phytotoxicity.