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What are the key points of apple autumn pruning techniques?
I. Autumn physiological characteristics: 1. In the late stage of new shoot nutrition (August to November), leaf photosynthates are transported downward in large quantities into buds, fruits, branches and trunks, and roots. 2. In the fruit ripening stage, including early, mid and late maturing varieties. 3. In the late stage of flower bud differentiation,
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Control Methods and Technical Key Points for Apple Little Leaf Disease
Apple little leaf disease occurs mostly in orchards with poor soil and good permeability. Because of low zinc content, soluble zinc salts leach away and the disease becomes severe; frequent watering and rainfall cause large losses of soluble zinc; excessive nitrogen fertilizer use increases the tree's zinc requirement; in saline-alkali soil the pH
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Key Technical Points for Pollution-Free Apple Cultivation and Management
We fruit growers must recognize the current and future development direction of producing pollution-free apples. We should focus on applying organic fertilizer. The principles of applying organic fertilizer are: first, to increase the organic matter content of orchard soil; second, to combine organic fertilizer with inorganic fertilizer. We should control nitrogen, stabilize phosphorus, and increase potassium.
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Key Technical Points for Autumn Management of Young Apple Trees
Young apple trees have relatively strong growth vigor but poor cold resistance. With poor management, they are prone to shoot shriveling after overwintering. In mild cases, growth is poor, the tree shape becomes disordered, and fruiting is delayed. In severe cases, the entire tree dies, causing missing plants and affecting orchard establishment. If autumn field management is strengthened to promote robust tree growth and well-filled, mature branches, overwintering ability can be effectively enhanced and dehydration shriveling can be prevented. The main autumn management measures are introduced below.
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How to prevent and control apple fruit cracking? Growers, master these key points
In recent years, apple fruit cracking is a common disease in production, seriously affecting fruit quality. The causes and prevention methods of apple fruit cracking are introduced below. Apple fruit cracking manifests as cracks or fissures on the fruit. There are various forms of fruit cracking: some split longitudinally from the side of the fruit,
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What are the key technical points for spring management of apple orchards?
I. Orchard sanitation: In combination with winter pruning, saw off rotten and diseased dead branches, cut off branches with woolly apple aphid galls, and thoroughly clean the orchard. Clear away fallen leaves, dropped fruit, residual branches and rotting bark, then bury them in pits or burn them to reduce the source of pests and diseases. In late March, when the buds show green, spray to sanitize the orchard.
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Control Methods and Technical Key Points for Mango Powdery Mildew
Mango is prone to powdery mildew during the flowering stage, young fruit stage and tender leaf stage. If not controlled in time, it will cause massive fruit drop and reduce yield. Mango powdery mildew is a fungal disease that mainly affects inflorescences, young fruits and tender leaves. On affected organs, scattered small white moldy patches first appear,
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Detailed Explanation of Key Techniques for Mango Cultivation
This variety was introduced from Thailand in 1990, and after several years of selecting the best from a population of asexually propagated superior individual plants, it was developed through selective breeding. After four consecutive years of multi-point planting trials from 1996-1999 in Guangdong, Guangxi, Yunnan and other places, its various superior traits showed stable genetic
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Mango Top Grafting and Replanting: Operation Methods and Key Technical Points
Over the past decade, mangoes have been planted in contiguous orchards on hillsides throughout the south, and production has developed rapidly. However, large trees and new trees that have been planted for many years need top grafting and replanting due to poor quality or mixed varieties and low yields. The methods are: 1. Preparation before grafting. Before replanting, strengthen fertilizer and water management for the trees to be replanted. Prune the aboveground parts appropriately, removing diseased branches, dead branches, shaded branches, overly dense branches, and crossing branches; for perennial large trees, in spring and autumn, saw off the main and lateral branches at 1.2-1.5 m above the ground (saw in spring and graft in autumn, or saw in autumn and graft the following spring), leaving some small branches. After new shoots emerge from the saw cuts, keep only 2-3 evenly distributed new shoots per cut. After the new shoots mature and their diameter reaches 0.5-0.8 cm or more, grafting can be done on the new shoots. Stop fertilizing 15 days before grafting, which can slow sap flow and benefit grafting.
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What are the key points for managing a citrus orchard in winter?
The key points for managing a citrus orchard in winter focus on the following aspects: 1. Remove winter shoots. As temperatures drop, citrus fruit trees gradually enter a relative dormant period. In the South Asian tropical citrus production areas where temperatures are relatively higher, young citrus trees will sprout scattered winter shoots. Winter shoots grow thin and weak and are not easy to mature, have no useful value, and should be removed in time to avoid consuming nutrients, which is not conducive to nutrient accumulation.
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