Orchard pesticides should not be sprayed indiscriminately

The orchard pesticides should be avoided indiscriminately to avoid unnecessary economic losses. There are several types of pesticides sprayed by fruit farmers, and everyone can learn from them.
1. Do not spray pesticides and other foliar fertilizers during the young fruit period.
In the young fruit stage of fruit trees, some fruit farmers spray "1605" on young apple fruit, and some give zinc spray fertilizer (for prevention of small leaf disease), iron fertilizer (for prevention of yellow leaf disease), etc., to the last fruit tree. Rusty spots. Many production practices have shown that pesticides and foliar fertilizers containing iron, copper, phosphorus, zinc and other ingredients should be sprayed on young apples before the end of May. If spraying, it is necessary to control the concentration.
Second, when the temperature is high, it should avoid spraying pesticides. Spraying pesticides on apple trees at high temperature at noon is not correct. If the temperature is too high, the efficacy of pesticides will be stronger, which will cause damage to leaves and fruits. Under normal circumstances, most pesticides are not suitable for spraying at high temperatures. First, the temperature is too high, the water evaporates quickly, and the concentration of the liquid increases, so that the phytotoxicity is learned. Second, the temperature is too high, the decomposition of pesticides is fast, and if it has systemic and infiltration, the control effect is even worse.
3. Spraying pesticides before the rain is not good. Spraying pesticides before the rain is not good. Many fruit farmers have deep experience. Generally, fruit growers think that the weather forecast is not necessarily accurate. Just before the rain, it is cloudy, people will not be heated, so he Spray the Bordeaux mixture to Huang Yuanshuai. He had just sprayed the medicine, and it rained in the sky, so he had to re-spray. After the spray of Bordeaux liquid, it rained, washed away the white ash, leaving copper ions, stimulating the fruit surface will produce phytotoxicity.
4. Spray twice after spraying once. It is a pity that it is re-sprayed because the liquid is poured out. This will easily burden the fruit trees and cause phytotoxicity. Generally, some fruit farmers spray the medicine on the fruit tree and see that the liquid medicine in the medicine tube is not, it is a pity to pour it! So he deliberately sprayed five trees with more apples and squirted the second time, resulting in phytotoxicity. The reason is that it can't be sprayed for the second time, which is equivalent to increasing the amount of spray. It is usually sprayed a second time, at least 7-10 days apart.

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