Recently, when the reporter interviewed Wei Lixin, a senior agronomist of the Jinwang Fruit Tree Professional Cooperative in Heyang County, Shaanxi Province, he told the majority of fruit growers that it was very important for apples to be used after three times of medicine before bagging. The drug must be sprayed at the critical time and in time to achieve better control of disease and insect pests in the young fruit period, and greatly reduce the pressure of the bagging and pest control.
When to spray the first drug after Xiehua
After Xie Hua, in the event of rainfall, the spores of apple powdery mildew, rust, bagging black spot disease, and early deciduous disease will swell and expand. After the rupture, the spores will spread or splash on the young fruit with the air flow or natural rainfall. And young leaf lenticels, which cause initial infection of young fruit and foliage. Judging from recent forecasts, there are rainy days in Shaanxi's local authorities, and it is hereby advised to pay attention to the non-sprayed spray, otherwise the germs will form initial infection after rain, and will not be able to protect the rain before rain. The incubation period after apple powdery mildew and rust infestation is very short. Brown spot disease is latent for 6 to 120 days, black spot disease is 7 to 100 days, rotten fruit disease is 15 to 150 days. It can be seen that the disease generally invades the naked eye earlier and is hard to see. When you see the symptoms, it is difficult to cure. At the same time, the apple larvae of the leafroll moths begin to injure 7 to 10 days after flowering, and the aphids hatched in overwintering eggs also begin to injure young shoots, shoots, and leaves. After flowering, the first generation of young spiders of the red spider Hawthorn spider also reproduces. Thus, it is critical to use drugs 3 to 7 days after Xiehua.
After Xie Hua, it is necessary to spray three times
Because the lenticels (fluff) on apple young leaves and young leaves are open, the effective control period for fungicides on primary infections is generally 7 to 12 days, which means that if there is rain within 7 days after the last spraying, The period of validity of the bactericide is 7 days; if the weather is clear and no rainfall after the last spraying, the bactericidal agent is valid for 12 days, and it must be sprayed for the second time within 13-15 days after the last spraying. The same is true for insect pests such as apple astragalus, red spider, and leaf roller moth, and when it accumulates to a certain amount, fine spraying will inevitably lead to "fish that slips through the net," and it will superimpose under high temperature conditions. Therefore, it must be prevented beforehand. At the same time, 30 days after flowering, it is the calcium-requiring period of fruit, and the calcium absorbed by the young fruit accounts for about 90% of the entire growth period. Because of the poor mobility of calcium, it is difficult to supplement after bagging. The calcium deficiency at the late stage of bagging induces bitter pit disease, honey disease and water cracks, and affects the surface finish of the fruit. How to avoid fruit rust and improve fruit surface finish in young fruit spraying
The prevention of fruit rust begins with the avoidance of stimulating disordered arrangement of epidermal cells and regulating the normal growth and development of damaged cells. Spraying fertilizer before fruit fluff fall off should not cause pesticide to stimulate fruit rust on the young fruit surface. Spraying medicine should preferably use small dosages such as suspension agent, microemulsion, water agent, and water dispersible granule to stimulate the fruit surface. . Do not abuse copper preparations, sulfur-containing preparations, arsenic-containing preparations, non-complexed mancozeb, organic phosphorus-based EC formulations, and foliar fertilizers containing more impurities, which are likely to cause invisible drug hazards. At the same time, attention should be paid to the second dilution of the dispensing and the atomization of the spray should be better. Do not use the spray gun with a relatively high pressure to avoid injury of the velvet hair caused by the young fruit.
Xiehua to the front of the bag before sneezing sneezing drugs 1, Xiehua 3 days to 7 days after the tree spray gold partner 400 pounds of water +40% myclobutanil suspension 1 bottle or 12% mesitulin 1 bag + C Sen Zinc half bag + Qingke 1 bottle (Avimet fluvoluril) or 5.7% Methotrexate 1 bottle + Chico Red imidacloprid 3 bags + Worm light 1 bottle + oligosaccharide calcium 1 bag + 25 ml Albit (Russian production ).
Description: 1 Myclobutanil is a systemic fungicide that is absorbed by the system, and the dosage form is a suspension agent. It has little stimulation to young fruit and has a strong eradication effect against powdery mildew and defoliation. 2 Propylene Zinc is a protective bactericidal agent. It has a broad spectrum of bactericidal effect and has good control effect on early defoliation. 3 Zhenglong is a microemulsion and has special effects on leaf roller moths and caterpillars. 4 Meng Meng is 40% imidacloprid suspension agent, mainly used to control aphids. The light of 5 insects has a good control effect on the red spider pups. 6 After flowering, the young fruit before bagging can absorb 90% of the total calcium absorbed in the year. It can be mixed with high-purity calcium fuluvate to prevent bitter pit disease.
2, after 13 days ~ 17 days after Xiehua spray gold partner on the tree 1400 pounds of water + love can be a bottle of 1 bottle + Qianhong 3 bags + lightworm 1 bottle + Aikang 1 bottle + oligosaccharide calcium 1 bag; 21600 pounds of water + love can be 4 bottles + pink red 12 bags + insects light 4 bottles + Ai Kang 4 bottles + oligosaccharide calcium 4 bags.
3, before the bagging of the tree spraying gold partner 400 pounds of water + love can be a bottle of + Hailey thiophanate-methyl 1 bag + white Tai Long 1 bottle + 45% is imidazoline 1 bag + insect dip light 1 bottle + Oligosaccharide calcium 1 bag or calcium fulvate 1 bottle + 25 ml Albit.
Description: 1 thiophanate-methyl is an essential inhalation fungicide before bagging, prevention and treatment of bagging black spot disease, rotenette rotten fruit disease effects. 2 White Tailong has the reputation of domestic kung fu, which is mainly used for the prevention and treatment of heartworms.
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