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What are the control methods for pineapple mealybug
The scientific name of the pineapple mealybug is Dysmicoccus brevipes (Cockerell), belonging to the order Homoptera, family Pseudococcidae. Dysmicoccus neobrevipes is the most commonly seen. Damage symptoms: adults and nymphs damage the rhizomes, leaves, fruits and seedlings of pineapple by sucking their sap. Affected leaves first show symptoms starting from the lower part,
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Key Technical Points for the Prevention and Control of Apple Pests and Diseases in the Mid-to-Late Stage
The young fruit stage is the peak infection period of early defoliation disease, the initial stage of branch ring rot, and also the peak damage period of aphids, leaf mites and scale insects. Therefore, doing a good job in the prevention and control of apple pests and diseases during the young fruit stage is crucial for strengthening tree vigor, improving fruit quality and achieving increased
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Key Management Techniques for Apple Trees After Harvest
It is now late autumn, the apples have ripened, and some have already begun to be harvested. After harvest, fruit growers should pay attention to the three major post-harvest management measures. Apply base fertilizer early. After the fruit is harvested, the third peak growth period of the root system arrives, and this is a good time to apply base fertilizer. For
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What to do when bagged apples develop shriveling and cracking
Bagged apples tend to develop micro-cracks and shriveled skin after the bags are removed. This phenomenon falls into two cases: first, the fruit has already developed shriveling and cracking inside the bag, and once the bag is torn off it becomes even more severe; second, there is no abnormality when the bag is torn off, but soon after coloring, micro-cracks, shriveled skin, softening and other undesirable phenomena occur.
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How to do winter pruning of apple trees? Detailed explanation of key pruning measures
In the training and pruning of apple trees, the choice of tree shape model must be targeted. For newly built orchards, the high spindle modern cultivation training method should be adopted. For old overcrowded orchards, a decision must also be made to carry out renovation. The renovation of overcrowded apple orchards mainly adopts the principles of thinning out, raising the trunk,
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What are the control methods for calcium deficiency in apple trees?
Symptoms of calcium deficiency in apple trees: bitter pit formed in the early stage, with a spongy texture under the skin but without rotting. The red spots and black spots formed before harvest should be distinguished as to whether they are an infectious disease or a physiological disorder. The red spots and black spots formed by infectious diseases rapidly expand and penetrate deep into the flesh and
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What should be noted before and after bagging apples?
Bagging fruit can make the fruit surface fine and smooth, with bright and beautiful color, prevent pests and diseases, reduce pollution from pesticides and dust, produce pollution-free high-quality premium fruit, and effectively enhance the commercial value of the fruit. However, some fruit growers' bagging techniques are not standardized, and measures are not fully implemented,
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What are the control methods for apple fruit cracking disease?
In the late stage of apple growth, fruit cracking disease is common and causes relatively serious damage, severely affecting the commercial value of apples and deserving sufficient attention. Apple fruit cracking disease is caused by slow expansion of fruit flesh cells during the early drought period of apple growth, and rapid cell expansion when rain occurs in the middle and late stages of apple growth
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Detailed Explanation of Key Points of Autumn Fertilization Techniques in Apple Orchards
1. Fertilization principles: On the premise of increasing the application of organic fertilizer and building up soil fertility, emphasize potassium, increase nitrogen, stabilize phosphorus, and supplement micronutrients, and vigorously promote soil-testing-based formula fertilization. 2. Fertilization types: (1) Organic fertilizers mainly include: manure and urine, barnyard manure, compost, cake fertilizer, straw,
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Detailed Explanation of Key Techniques for Autumn Management of Apple Trees
The peak period of flower bud differentiation in apple trees occurs in autumn. Doing a good job of autumn management of apple trees can lay a solid foundation for high, stable and high-quality yields in the following year. Fertilizer and water management For non-bearing trees, 0.15-0.25 kg of diammonium phosphate can be applied per tree; for large bearing trees, according to the planned yield for the following year, 0.7 kg of pure nitrogen and 0.7 kg of available phosphorus can be applied per 100 kg of fruit. Topdressing for young trees can significantly increase the sprouting rate in the following year. For large trees in full bearing period, applying fertilizer in autumn year after year, under the same amount and types of fertilizer, compared with topdressing in early summer, can increase the yield by about 50 kg per tree.
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