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Fungicides Have Special Requirements
Sep 27, 2017

Use fungicides to fill the root of the following points:

First, the use of bacterial fertilizer has been used as far as possible without fungicide irrigation root disease prevention. For the use of bacterial fertilizer, the use of bacteria in the bacteria after the bacteria to kill, Fungicides so that fertilizer loss of fertilizer. If the crop has been disease, you must use fungicides irrigation roots, do not consider the bacteria in the biological bacteria are injured, so as to avoid small loss, leading to disease outbreak.

Second, after a few days of irrigation within the shed do not pour water. Immediately after pouring irrigation water, will reduce the concentration of liquid, affecting the control effect. So in the fungus irrigation within a few days as much as possible do not pour water, if the lack of water, you can slide in the planting ditch a small water to the ridge to ridge 1/3 is appropriate, pay attention not to diffuse ridge , Fungicides So as not to dilute the concentration of liquid in the soil.

Third, the use of fungicides after irrigation, once the wilting, yellow, stop and other symptoms of injury should be promptly remedy. Immediately poured a water to dilute the concentration of liquid in the soil, in time with the first root of the United States or the United States and more expensive spray irrigation irrigation root, the solution of injury, restore the growth of plants significantly.

Different concentrations of fungicides have their own special requirements, the concentration must be strictly in accordance with the "instructions" operation, Fungicides not free to increase or shrink.

Spraying fungicide time too late or too early will affect the control effect. Should be based on the occurrence of different diseases of the crop and the specific circumstances of timely medication. Usually in the pre-onset (protective medication) or early onset (take preventive measures) is better.

The number of times the spraying of the fungicide is mainly determined according to the length of the pharmaceutical duration and the meteorological conditions. Generally every 10 to 15 days spray time, a total of spray 2 to 3 times. In case of special circumstances, such as after the application of rain, Fungicides should be promptly spray once.

The number of drugs should be appropriate, Fungicides too much medication will increase the cost, easy to cause injury, and medication too little can not achieve the purpose of medication. Medication quality should pay attention to, spraying spray uniform requirements, and strive to do not leak spray.

Fungicides cause phytotoxicity for a variety of reasons, Fungicides the first general water-soluble drugs prone to phytotoxicity, followed by different crops on the sensitivity of the drug is also different, such as Bordeaux mixture generally does not cause injury, but the copper-sensitive crops Will also produce phytotoxicity. In addition, the general high temperature and drought, strong sunshine or fog, high humidity and other conditions of the drug can easily cause crop damage.

Because a lot of fungicides for alkaline pesticides, it can not be encountered with alkaline substances easy to decompose the loss of pesticides, such as Bordeaux liquid, stone sulfur mixture was alkaline. There are also some fungicides such as carbendazim can not be mixed with Bordeaux liquid, Fungicides lime sulfur mixture, thiophanate and other fungicides mixed with the same insecticide (bacteria) microbial loss of physiological activity and insecticide (bacteria) capacity and failure.

The use of fungicides also has crop disease resistance problems. Fungicides In order to avoid drug resistance, in the scientific selection of pesticides on the basis of effective use of different types of pharmaceutical alternating (rotation) use, is strictly prohibited long-term use of a single pesticide.