I. Precancerous control measures before apple blossom

1. Broad-spectrum fungicide is sprayed on the whole tree after clearing the garden in spring to eradicate the pathogenic bacteria that lurk on the surface and surface of the tree to protect the cut kerf, and prevent the new sawdust from being infected with ringworm pathogen and rot rot in April-June. Infection.

Adult trees spray high concentrations of Bordeaux mixture, the ratio of copper sulfate: lime: water ratio of 1:2-3:60-100, or spray 5 Baume degrees of lime sulfur. The saplings are all coated with Bordeaux pulp, with a ratio of copper sulphate to lime: water in a ratio of 1:3-5:20-30, plus 1%-2% of animal oil, vegetable oil or soybean meal.

2. Before the flowering, the entire garden sprays the second medicament, which mainly eliminates the newly hatched or larvae of the larvae such as aphids, red spiders, green eyes, and leaf roller moths; the young tissues of the apple are protected from powdery mildew and rust at the flowering stage. Diseases such as mycotic disease, flower rot, and other diseases.

The second time of drug use was from apple blossom red to inflorescence separation. When the medicine is used too early, the amount of insect pests is small and the control effect is poor. The use of medicine too late to kill pollination insects. If the temperature is too high, the development of flower buds is fast, and the time for drug use should be appropriately advanced; if the temperature is low, the drug time can be postponed appropriately. Pharmacy can use 43% tebuconazole 2000-2500 times or 40% fluorosiliconazole 4000-5000 times, or 25% propiconazole 800-1200 times + 35% chlorantraniliprole 125,000 times fluid +31.5 % Xicang Huaguoling 500 times liquid; when the number of bases for the wintering season is large, the number of insecticides is 48% for chlorpyrifos 1500-2000 times or 3000 times for 25% imidacloprid. Liquid; Hawthorn red leafhopper, two-spotted spider mite or apple All-jawed cicada overwintering base is too large, then add 24% Chai Xie 500-800 times liquid or add 5% oxazolium ester 1000-1500 times liquid.

II. Prevention and Control of Diseases and Insect Pests after Apple Sprinkle Down to Bagging

1. Apple's first use of drugs after Xiehua mainly controlled red spider mite, mold heart disease, apple leaf roller moth and ring sputum disease, and also aphid, rust, powdery mildew, spotted leaf disease. The medication time is 5-10 days after the flower is spent. In addition, the medication time should be selected according to the occurrence of pests and other pests, to control the hawthorn orchard-based orchards, 7-10 days after the Xiehua medication control effect is best; the apple crucian carp as the main evil In the orchard, the application time is appropriately 3-5 days ahead of schedule.

This period of drug use to protect the young fruit, prevent disease, pest management, killing, calcium supplement at the same time, can choose 1-2 fungicides, 1 insecticide, 1 acaricide and 1 calcium supplement mixed There should be no more than 5 kinds of mixed agents. When apples enter the growing season, insecticides are recommended to use highly specialized agents. Broad-spectrum insecticides such as pyrethroids and organophosphorus insecticides are not recommended. Suggestion: No rain at flowering time, can choose 70% Antai 800 times or 75% mancozeb 800 times liquid +10% Polaroid 1500 times + 20% tebufenozide 1000 times or 25% diflubenzuron 1500 Times of liquid +24% of the endangered 4000 times liquid +16% Tsui Kang calcium treasure 1500 times liquid. Severe rain or powdery mildew during flowering, fungicides can be changed to 70% thiophanate-methyl 1500 times or 10% difenoconazole 2500 times +10% polymycin 1500 times.

2. The second application of the apple after deflowering is mainly to protect the young fruit and flower from infection by ringworm, mold heart disease, and black spot bacteria, and simultaneously treat various aphids, rust, spotted leaf disease, rot, cotton bollworm , Red spider, Cornell mealybugs and so on. The second dose is 10-15 days after the first dose.

If there is no effective rainfall after the first dose, use 75% mancozeb 800 times or 70% thiophanate-methyl 1500 times + 25% imidacloprid 5000 times + 17% Watson 1500 times. In case of effective rainfall, the bactericide was changed to 10% difenoconazole 2500 times or 50% carbendazim 800 times. An orchard with a serious rust hazard can be replaced with 75% of the bactericide.

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