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The key to a high-yielding pear tree lies in good blossom-period management
1. Fertilizer and water management. When pear trees bloom, insufficient nutrients affect fruit set and the swelling of young fruit, so urea should be applied 10-20 days before flower buds break. The amount applied is generally determined by tree age, tree vigor, yield and the nutritional status of the first half of the year. Spraying a 0.20%-0.50% boric acid solution during the flowering period and after flowering can increase the fruit-setting rate.
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How to Regulate the Production Period in Mango Cultivation
Mango generally flowers around December to January and matures from May to July, which happens to coincide with the peak production season of many other fruits, causing prices to plummet and often leaving growers with nothing to show for their efforts. Conversely, in the off-season, prices rise due to low supply, but this makes consumers pay more
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Detailed Explanation of Flowering Period Regulation Techniques for Mango Cultivation
Mangoes in Guangdong generally bloom around February each year. At this time, they often encounter the influence of cold air from the north moving south, with low temperatures, continuous rain, and high air humidity, causing anthers not to split open, stigma damage, and even flower panicle mildew and death, affecting that year's fruiting. According to expert
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Citrus cultivation requires timely promotion of flower bud differentiation
Since the beginning of winter, temperatures have remained on the warm side, citrus orchard soil moisture content is relatively high, and some citrus trees have begun to sprout winter shoots, which is very unfavorable for citrus flower bud differentiation this winter. If not handled properly, it will cause serious effects on citrus production next year. Citrus growers should
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How to Promote Coloring and Flowering in Citrus? Practical Cultivation Methods Shared
To achieve beautiful coloring and high fruit quality in citrus, the key is to apply phosphorus and potassium fertilizers early, because phosphorus and potassium help sugar accumulation and protein formation, and increase fruit coloring. Never spray fast-acting nitrogen fertilizer; with abundant nitrogen and vigorous tree growth, most photosynthetic products are converted into nitrogen-containing organic compounds
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Key Technical Points for Flower and Fruit Retention in Citrus Cultivation
The 2-3 months from bud emergence to fruit set stabilization is the most important period of the year for citrus trees. For a good harvest, comprehensive flower and fruit retention measures must be taken according to the growth conditions of the citrus trees and changes in weather. 1. Reasonable fertilization: For citrus orchards that were not fertilized last winter, organic fertilizer should be supplemented as soon as possible. For adult trees, apply 5-10 kg of chicken manure or 1-2 loads of farmyard manure per tree, plus an appropriate amount of urea, and bury it around the root zone. The fertilization principle during the flower and fruit retention period is: nitrogen-based in the early stage, emphasis on potassium with phosphorus supplementation in the later stage; combining soil fertilization with foliar feeding. For the post-bloom fertilizer, apply compound fertilizer plus an appropriate amount of urea during the flower-falling period to promptly replenish nutrients consumed during flowering; for the fruit-setting fertilizer, apply potassium fertilizer plus an appropriate amount of phosphorus fertilizer; for the fruit-swelling fertilizer, apply compound fertilizer plus potassium fertilizer. For foliar feeding, spray 0.2% monopotassium phosphate twice from spring bud break to before flowering, spray nucleotides during rainy days, and add 0.1% borax to one of the applications; during the young fruit stage, spray foliar fertilizer 2-3 times in combination with pest and disease control or fruit retention, with the first foliar spray including 0.1% magnesium sulfate and 0.1% zinc sulfate.</p><p>2. Soil management: Repair drainage ditches inside and outside the orchard to remove standing water, so that waterlogging on rainy days does not affect root growth or even cause root rot leading to flower and fruit drop. During continuous dry and hot weather lasting more than 10 days, irrigate promptly to keep the soil moist and loose, which helps the root system absorb water and nutrients.</p><p>3. Scientific use of growth regulators: Plant growth regulators commonly used for citrus fruit retention include 2,4-D, fruit-retention hormone, triacontanol, 920, and fruit-retention agents. Use them 2-3 times after flower drop, spraying once every about 15 days. Alternating different growth regulators gives better results. For seedless and few-seeded citrus varieties, using 920 or triacontanol for fruit retention gives better results.</p><p>4. Pest and disease control: During the flowering and fruiting period, the main pests and diseases include red spider mites, rust mites, aphids, citrus blossom midges, tortrix moths, anthracnose, and scab. For aphid control during the spring shoot stage, use omethoate or monocrotophos; in early to mid-April (or early March if drought occurs), control red spider mites, and in mid-to-late April control rust mites, using acaricides or biological pesticides for spraying; spray organophosphorus pesticides at the early bud stage to kill citrus blossom midges and tortrix moths; for diseases, focus on prevention, using fungicides such as copper oxychloride or thiophanate-methyl.</p><p>5. Control early summer shoots: From May to mid-June, promptly remove early summer shoots to avoid competition between shoots and fruit for nutrients, which benefits young fruit development and reduces fruit drop. For vigorous trees with few flowers and few fruits, girdle the trunk 25 days after flower drop to retain fruit, which can also control summer shoots.</p>
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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 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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Control Methods for Leaf Spot Disease in Balloon Flower Cultivation
Balloon flower (Platycodon grandiflorus) is a perennial herbaceous medicinal plant, with its roots used as medicine. The control methods for leaf spot disease in balloon flower are as follows: 1. Symptom identification: This type of disease mainly damages the leaves of balloon flower. (1) When infected by the septoria leaf spot pathogen, white circular or nearly circular lesions appear on both sides of the leaves,
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Control of Root-Knot Nematode Disease in Balloon Flower
Along with the adjustment of the industrial structure, the balloon flower planting area in our district has been continuously expanding. However, due to years of continuous cropping, the occurrence of root-knot nematode disease has shown a spreading trend, causing balloon flower to lose its commercial value and reducing economic returns. 1 Disease symptoms After balloon flower is infected by root-knot nematodes, when the disease is mild
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