June is the key to prevent apple pests and diseases
June is the young fruit period of apple. It is also a variety of pests and diseases that begin to infect and occur. The principle of pest prevention and control is to prevent disease and pest control, and to minimize the use of pesticides. In order to prevent and treat apple leaf spot defoliation and apple ringworm disease, and treat other diseases and pests, the effect of pest control in young fruit has a great influence on fruit quality, so it should be given special attention.
Pharmaceuticals that cannot be used in young fruit 1, Bordeaux mixture, essential, Cobo and other copper-containing preparations; 2. Chlorothalonil, tetromycin, thiram, mancozeb, etc.; 3. Inferior emulsifiable concentrate preparations and spreading agents , penetrants, etc.; 4. Sulfur-containing compound preparations, including sulphur for filling, carbendazim produced by thiram, thiophanate methyl and others. These drugs have a large stimulus to the fruit surface and are likely to cause rough fruit after use.
Notes on the use of young fruit medication 1, pay attention to the weather conditions of spraying: rainy days, foggy days, there is dew, high temperature can not spray at noon. 2. Pay attention to the quality of spraying: The pressure during spraying should be large, the finer the atomization, the finer the spray head should be about 50 cm from the fruit surface and the leaf surface, so that the pesticide can be attached to the back and the fruit surface of the leaf blade as evenly as possible with fine mist droplets. Avoid washing the medicine on the fruit surface to minimize the irritation on the fruit surface. 3, spraying water to be clean: before the fight drugs to clean the pool, especially hit the herbicide, lime sulfur pool, medical equipment, before the fight drugs should be cleaned, do not use the sewage treatment, use clean water. 4, the dispensing method should be scientific: to use the "secondary dilution method", that is, first pour the drug into a small amount of water, stir, and then dilute the liquid into a sufficient amount of water, stir and spray. Must use the "first add water, after dosing, secondary dilution, stir spray" of the dispensing operation method.
Medication Tips 1. Intrauterine and protective bactericides are used interchangeably. Do not use one drug continuously. 2, according to the climate and insect pests flexible use of drugs, avoid playing experience drugs.
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