Orchard fight drugs should not use spray gun
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First, the standard amount of water used to waste serious constant spray method is 60~100kg/time, and no more than 150kg/time. However, in many places, the amount of water sprayed by the farmers is 200-300 kg/mu, and in some areas up to 400 kg/mu. Why use so much water? According to investigations, when farmers fight drugs, they generally have such a knowledge that after the medicine is finished, it must flow down the branches and leaves. If there is no flow or flow, it is considered that the medicine has not been played well. I feel very unsteady." In fact, this is a totally wrong understanding. It is both costly and time-consuming and it is not worth the candle.
Second, poor atomization, poor control effect See some fruit farmers fight drugs, I have a feeling, like the firefighters, like the fire extinguishing, the leaves and fruit to play a circle, the scene is very spectacular, but after the close look, some places There is no medicine, and the local medicines that are on the medicine do not evenly spread out. Instead, they pile up into a large piece of water droplets. Some fruit growers are very strange. "With the same medicine, why did people put the pests down, and I didn't fight?" Some fruit farmers also asked, "Is it really impossible to fight pests and drugs once and for all?" I think we should also look for reasons from this aspect.
Third, it is easy to cause localized injury and fruit rust formation, especially in the following two parts of the young fruit period: First, the fruit surface facing the nozzle is wounded by the high pressure of the spray gun to form fruit rust. The second is the bottom of the fruit, due to too much spray water atomization is too poor, by the role of gravity, the liquid sprayed on the fruit will flow to the bottom of the fruit and pile up, thus virtually increase the concentration of this part of the liquid , it is easy to cause injury, and then form fruit rust. To weigh the pros and cons, the author suggests that the orchard spray should be replaced by a double or triple nozzle instead of a spray gun. If you want to use it, try to reduce the pressure as much as possible. In a word, regardless of the type of spray equipment used, it must achieve “Pressure should be even, fog should be fine, atomization should be good, and medicine should be comprehensiveâ€. (Li Wenbo)