Apple sprays should be timely after flowering

A few days ago, when the reporter interviewed Wei Lixin, a senior agronomist at Jinwang Fruit Tree Professional Cooperative in Heyang County, Shaanxi Province, he warned the vast number of fruit farmers that the three times of medicine after the apples are flowered and before the bag is important in the use of medicines throughout the year. The medicine must be sprayed on time at the critical time to achieve a better control effect on the diseases and insect pests in the young fruit stage, greatly reducing the pressure on the prevention and control of pests and diseases in the bagging garden.

When to spray the first medicine after Xie Hua

If there is rain after the flowering, the spore disks of the apple powdery mildew, rust, bagged black spots, and early deciduous disease will absorb water and swell. After the rupture, the spores will be spread or splashed on the young fruit with the air flow or natural rainfall. And young leaf skin pores, that is to cause the initial infection of young fruit and leaves. Judging from the recent forecast, there is local rainy weather in Shaanxi. We hereby remind you to spray without spraying, otherwise the bacteria will form an initial infection after the rain and will not play the role of protection before the rain. Apple powdery mildew and rust have a short incubation period after invasion, brown spot disease incubates 6 to 120 days, black spot disease 7 to 100 days, and fruit rot disease 15 to 150 days. It can be seen that the disease generally invades earlier and is difficult to see with the naked eye, and the damage is later It is difficult to cure the symptoms. At the same time, the larvae of leaf-rolling moths begin to harm 7-10 days after the apples are flowered, and the aphids hatched by the overwintering eggs also begin to harm the young shoots, shoots and leaves. It can be seen that the medication is very important 3 to 7 days after Xie Hua.

Why do you need to spray three medicines after Xie Hua and before bagging?

Because the skin holes (villi) on young apples and young leaves are open, the effective control period of general fungicides for initial infections is 7 to 12 days, which means that if there is rain within 7 days after the last spray, The period of validity of the fungicide is 7 days; if the weather is clear and there is no rain after the last spray, the period of validity of the fungicide is 12 days, and it must be sprayed a second time within 13 to 15 days after the last spray. The same applies to insect pests such as apple yellow aphids, red spiders, leaf moths, etc. When it accumulates to a certain amount, no matter how fine the spray is, there will inevitably be "leakage fish" that will multiply and reproduce under high temperature conditions, so it must be prevented. At the same time, 30 days after flowering is the calcium-requiring period of the fruit. The calcium absorbed by the young fruit accounts for about 90% of the entire growth period. Due to the poor mobility of calcium, it is difficult to supplement after bagging. Calcium deficiency at the later stage of bagged fruit will induce bitter pox, honeydew, water cracks, and affect the surface finish of the fruit. How to avoid fruit rust and improve the smoothness of fruit surface when spraying in the young fruit stage

The prevention of fruit rust must start from avoiding the stimulation of the disordered arrangement of epidermal cells and regulating the normal growth and development of damaged cells. Spraying fertilizer before the fluff of the young fruit falls off should not cause the agent to stimulate fruit rust on the young fruit surface. Spraying should prefer suspension, microemulsion, water, water dispersible granules and other excellent dosage forms that have less stimulation on the fruit surface . And do not misuse copper preparations, sulfur-containing preparations, arsenic-containing preparations, non-complexed mancozeb, organic phosphorus emulsifiable concentrates, foliar fertilizers with more impurities, etc., which are likely to cause invisible drug damage. At the same time, pay attention to the second dilution of the dispensing and the atomization of the spray. Do not use a spray gun with a higher pressure to avoid hitting the fluff of the young fruit and causing the cork.

What medicine to spray after Xiehua to before bagging 1, 3 to 7 days after Xiehua to spray gold on the tree 400 jins of water + 1 bottle of myclobutanil 40% or 1 bag of 12% methomycin + C Mori zinc half bag + 1 bottle of green gram (mefluranide) or 1 bottle of 5.7% avermectin + 3 bags of imidacloprid + 1 bottle of insect mite light + 1 bag of oligosaccharide calcium + 25 ml Albit (made in Russia ).

Explanation: ①Myclobutanil is a systemic conductive bactericide, the dosage form is a suspending agent, it has little irritation to young fruit, and has a strong eradication effect on powdery mildew and deciduous disease. ②Prosenzinc is a protective fungicide with a broad spectrum of sterilization and good prevention effect on early defoliation. ③Zhenglong is a microemulsion, which has special effects on leaf moths and caterpillars. ④Zhengmeng is a 40% imidacloprid suspension agent, mainly used to control aphids. ⑤ Insect mite light has a good control effect on red spider mites. ⑥The young fruit can absorb 90% of the total calcium absorption throughout the year after the flowers are flowered and before bagging, and can be sprayed with high-purity calcium fulvic acid to prevent bitter pox.

2. 13 to 17 days after the flowering, the gold partner for spraying on the tree â‘  400 kg of water + 1 bottle of Aike + 3 red bags + 1 bottle of mite light + 1 bottle of Aikang + 1 bag of oligosaccharide calcium; + 4 bottles of Aike + 12 bags of Qianhong + 4 bottles of mite light + 4 bottles of Aicon + 4 bags of oligosaccharide calcium.

3. 400 kg of gold sprayed on the tree before bagging, 1 bottle of Aike + 1 bag of thiophanate methyl + 1 bottle of white Tyrone + 1 bag of imidacloprid 45% + 1 bottle of insect mite light + 1 bag of oligosaccharide calcium or 1 bottle of calcium fulvic acid + 25 ml of Albit.

Explanation: â‘ Methylthiobacillin is an indispensable systemic fungicide before bagging, and it has the special effect of preventing bagging black spot disease and ring pattern rot fruit disease. â‘¡White Tailong has the reputation of domestic kung fu, which is mainly used to control heartworms.

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