At present, the fruits of medium-mature apple varieties are gradually taken out of the bag and enter the fruit growth stage. How to strengthen management at this time to ensure that middle-maturing varieties are properly harvested and improved in quality and efficiency? Yu Hongqi, a senior agronomist at Yangling New Farmers' Farm in Shaanxi Province, believes that Apple management will take the last few moves after the bag is taken. If you take a good walk, you will have a bumper harvest.
The bag removal time should be determined according to the harvest period
Yu Hongqi, based on experience and practice, believes that the best time from bagging to bag removal is 100 days, but not less than 90 days. In addition, the debagging time should be determined according to the harvesting period. Generally, the debagging is carried out about 20 days before the fruit is harvested. The bag-breaking time is between 8 a.m. and 11:30 a.m. and 2:30 p.m. to 6 p.m. is the best time. . "It is not suitable to take the bag off during rainy days, cloudy days, windy days, too high or too low temperatures."
To remove the double-layer bag, first remove the outer layer paper bag. After 3 to 5 sunny days, remove the inner bag. If the inner layer is a plastic film bag, you can color it without removing it.
Disease prevention and treatment after bagging
"If the orchard is well protected, there is no need to fight drugs after the bag is removed. If the protection is not satisfactory and the disease is severe, it is necessary to fight drugs. The disease caused by spotted larvae often infects the fruit and causes red spot disease." said Yu Hongqi. Do not think that fruit trees are bagged, so they are safer and do not fight drugs. Second, apple diseases and insect pests after bagging mainly include brown spot disease, black spot disease, and red spot disease.
"Red dot disease is actually a disease of spotted defoliation." Yu Hongqi, after many years of production experience, believes that effective agents for preventing and treating this disease are: Prosin Zinc, Manson Manganese Zinc, Tebuconazole, Difenoconazole, Myclobutanil, etc. . "The initial infestation period of pathogens of spotted larvae disease is in the middle and early June and the peak period of onset is from July to August. It can be endangered until mid-October. The occurrence and prevalence of this disease are closely related to climate and species. In the spring drought year, the initial period is delayed; in summer, the rainfall is heavy and the incidence is heavy.â€
In addition, the thorough cleaning of gardens in winter and spring, burning of fallen leaves, and reduction of wintering pathogens are also effective measures to prevent and treat spotted leaf disease. First of all, after the leaves are cleared, the garden will be cleared in time to destroy the fallen leaves and reduce the source of overwintering bacteria. Second, strengthen orchard management, increase tree vigor, and increase disease resistance of fruit trees.
Strengthen soil and water management
The timely addition of basal fertilizer after harvesting of the medium-maturing varieties and harvesting of the fruits of the late-maturing varieties can increase the storage nutrition level of the trees in the same year. Yu Hongqi said that at this time, the root system entered the third growth peak, and the roots of the fertilized damage were prone to callus formation, repairing the root system, and promoting new roots.
Basal fertilizer is mainly composed of organic fertilizer, adding appropriate amount of quick-acting fertilizer or fruit tree special fertilizer, and the fertilizer amount accounts for 60% to 70% of the total amount of the whole year. Saplings Mushi 2000 to 2500 kilograms of decomposed organic fertilizer; trees over 5 years old apply 4000 to 5000 kilograms of organic fertilizer. At the same time, we must properly control the supply of water, and pay attention to do a good job of flood prevention work, in order to facilitate the coloration of late-maturing varieties of fruit, improve the appearance of quality.
Blowing Mouth,Disposable Blowing Mouth,Filter Spirometer Mouthpiece,Disposable Spirometer Mouthpiece
Hengshui Qifei Paper Products Co. LTD , https://www.hengshuiqifei.com