Pesticide spraying methods more scientific grasp the main points

Spraying method is the most common method of application, that a certain amount of pesticide with an appropriate amount of water dubbed liquid, spraying the liquid spray apparatus into droplets. This method is suitable for cream, liquid, wettable powders, soluble powders, and flowable agent pesticide formulations, both for foliar treatment, but also do soil treatment.

First, a spray method used

Per acre (667 square meters) the amount of spray liquid, aerosol spray method often divided into high-volume, medium volume spraying, low volume spraying, low volume spraying and ULV other categories.

1, high-volume spraying

Coarse spray, also known as high-volume spray, they use a knapsack sprayer type 16 and 36 type motor sprayer spraying per acre (667 square meters) the amount of more than 40 liters of liquid spray, mostly 50 to 75 liters of pesticides diluted with water , liquid concentration of less than 1000 mg / kg, the median droplet diameter of 400 to 1000 microns, a specific spray method. Suitable for high-volume spray water rich agricultural areas and control of plant pests base for soil treatment control weeds, pests on foliage and has a good control effect, but prone to bouncing droplet, rolled leaves, pesticide loss of more that cause soil and water pollution.

2, the capacity of the spray

In volume spray, also known as the constant spray, is the use of 16 workers and peasants backpack sprayer and 552 - Hepatitis shoulder-mount pressure sprayers spraying, spray nozzle aperture diameter of 1.3 to 1.6 mm, the liquid diluted with water, the concentration in 1000 mg / kg or more per acre (667 sq.m.) spray volume of 12.5 to 50 liters, a median droplet diameter of 250 to 400 microns, is a targeted spray. Volume spray is also used in many water areas, pesticide spraying high capacity utilization ratio.

3, low-volume spray

Low-volume spray, also known as fine spray or mist. With 16 workers and peasants and 552 - Hepatitis sprayers, sprinklers spray containing 0.7 to 1.0 mm aperture diameter for fine spray. DFH type 18 with the use of high-speed air motor sprayer spraying the liquid into the fog often called Mist. Low volume spraying diluted with water and the solution concentration of 0.8 to 3% per acre (667 square meters) of 2.5 to 12.5 spray liquid L, median droplet diameter of 150 to 250 microns and a targeted weed killer sprayer a combination of spray drift spray way to avoid large droplets produced by bouncing rolling phenomenon, and droplet dispersion among the plants, able to achieve an effective pest control droplet coverage density standards. And through plant uptake of pesticides, as well as the plant itself breathing infiltration, transpiration, spit water and other physiological functions, so that pesticides play a role in redistribution. Low-volume foliar spray for control crop pests and diseases, with good control effect, saving pesticide advantages, but not for chemical weed control. Because pesticide use higher concentrations of highly toxic pesticide spraying can not use this method.