In August, the mid- and late-ripening apple varieties enter the fruit expansion period, and fertilizer supply is also an important management point. In addition, we must do well in summer pruning. In August, what are the key management points for Apple Orchard? Pest Control. Spray with Bordeaux mixture as the main agent and alternately use systemic agents to prevent and control the occurrence of early apple leaf fall; in terms of insect pests, control Lepidopteran pests such as golden moth and apple leaf roller. In late August, the tree trunks are tied to grass handles to trap red spiders and other pests through the winter, and they are thawed and burned before thawing in the following year to reduce insect population density. During the rainy season, the following points should be paid attention to to improve the effect of pest control: 1. Use strong systemic pesticides, which can be quickly absorbed by crop stems and leaves to transmit to various parts, and its efficacy is less affected by rainfall. 2. Using pesticides with strong knockdown power can quickly exert its effect on the prevention and control of pests and diseases, thereby avoiding or reducing the leaching loss of the pesticides by rain. 3. Use pesticides resistant to rain erosion (such as Bordeaux mixture), which has strong penetration and erosion resistance, and is suitable for application in the rainy season. 4. Choose the rain-free period for application, and add adhesive to the liquid: adding adhesive can improve the control effect; if rain occurs within 24 hours after application, re-spray once, and appropriately reduce the spray concentration when re-spraying. Fertilizer supply. 1. During the period of rapid fruit growth and coloring, the amount of nitrogen fertilizer should be strictly controlled, and phosphorus and potassium fertilizers should be added to facilitate fruit development, coloration and flower bud differentiation. Results The fruit trees were topdressed with potassium sulfate compound fertilizer 0.5-1.5 kg/plant. At the same time, combined with spraying, spray 0.3% potassium dihydrogen phosphate or other light and micro-fertilizers every 15-20 days. 2. As a result, fruit trees should be topdressed in time to promote flower bud differentiation. Generally, 0.1-0.2 kg potassium dihydrogen phosphate and 0.3-1 kg potassium sulfate compound fertilizer are applied. 3. Intertillage and drainage: timely intertillage and weeding, pay attention to drainage during rainy season to prevent flood damage. In the rainy season, most of the orchards are overgrown with weeds, which will inevitably cause the spread of pests and diseases in the orchards. After the beginning of autumn, the grass is aging. At this time, spray 200 times solution of glyphosate, and use 1-1.5 kg of medicine per mu. It can be controlled by using twice in the growing season. Orchards, especially stone fruit orchards, should be drained in time to prevent dead trees and root diseases caused by waterlogging. Summer pruning. 1. Pulling branches, fruit tree branching is better in late summer and early autumn (from mid-August to mid-September). During this period, the branches are soft and malleable. According to the plastic requirements, the angle of the branches can be opened, or the direction of extension and growth of the branches can be changed. 2. Thinning branches. In early August, for large trees with too many auxiliary branches, some large branches can be thinned. Long branches, upright branches and excessively prosperous branches should also be thinned according to the space to improve the ventilation and light conditions of the tree. Improve the quality of flower buds. 3. Wipe off the buds, timely wipe off the useless buds and new shoots that sprouted from the branches and the cutting saw. Fruit management. The bagged fruits of mid-ripening varieties will be bagged from mid to late August. For double-layer bags, go to the outer bag first, and then go to the inner bag after 3~5 days. For single-layer bags, tear the paper bag longitudinally first, leaving the remaining bags on the fruit, and remove them after 3 to 5 days. Pay attention to choosing to go to the bag during the day when the temperature difference between the inside and outside of the bag is small. After the bag is removed, the leaves are picked, the fruit is transferred, and the reflective film is laid to promote the coloring of the fruit. The marshal varieties that are prone to fruit drop before harvest are sprayed with 30-40 mg/kg naphthalene acetic acid once in mid-August and at the end of August, one month and half a month before harvest, to prevent fruit drop before harvest. Weeding and flood prevention. The high temperature and rainy season is conducive to the growth of weeds. According to the height of the weeds in the orchard, weeds should be cut in time to avoid excessive weeds affecting the ventilation of the orchard. In the rainy season, pay attention to draining the accumulated water in the orchard in time to reduce the soaking time of the fruit trees. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Barrier Mesh,Plastic Fence Mesh,Insect Barrier Netting,Agfabric Insect Netting Changzhou Satidi Import and Export Co., Ltd. , https://www.guanjiejts.com