1 arbitrarily increase concentration, close spraying effect solution uniform coverage spraying some friends of farmers affected by bad habit, difficult to control pests and diseases encountered often only increased the dosage, without increasing the amount of water, causing the liquid concentration increased, and the liquid is less difficult in fruit bottle sprayer sprayed uniformly thoughtful, affecting control effect, and even cause injury. Some growers in the spraying nozzle too close with fruit trees, fruit trees leaves under the impact of high pressure are turned up, so easily damaged fruit surface.
(2) spraying pesticides like some fruit trees that drug wash spray the better, like to spray fruit trees have leaves dripping, thinking that we go. But just the opposite, worms down not by flushing with fresh water, but by the suction, tag, fumigation and to kill, and a large easy to make water plant stomatal closure, but absorb less water and more, this spraying method waste, investment large, poor results. And easy to make fruit calyx dip too much liquid at the plot, the long-term accumulation likely to cause injury, affecting fruit quality.
3 sprayer pressure is too small, motorized tree sprayer nozzle is too large, poor atomization, resulting in reduced droplet density is taken sprayer hydraulic atomization, spray some domestic enterprises, especially some small production companies due to their technical limitations, mainly the production of pressure sprayer. Farmers spraying pesticides in small, often due to the pressure caused by the crown, not spray within the Church, forming leak spray, motorized sprayer takes the pneumatic atomization, some farmers friends in order to save time, especially some of the staff in order to provide paid services to improve spraying efficiency, often intentionally poke the nozzle orifice gasket big, not knowing that after such a transformation is to improve efficiency, but the atomization effect is reduced, will inevitably affect the control effect.
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