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What are the care methods for citrus trees after freezing damage
After a citrus tree is damaged by freezing, the aboveground part suffers varying degrees of injury or dieback, while the underground part is generally less damaged. Post-freeze care measures mainly make use of its relatively intact root system to promote the sprouting of new branches, restore the canopy as quickly as possible, and gradually achieve the goal of normal growth and fruiting.
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Occurrence Patterns and Control Methods of the Citrus Whitefly
The citrus whitefly, Dialeurodes citri (Ashmead), also known as the citrus whitefly, Tongcao whitefly, and orange-yellow whitefly. In recent years, damage in citrus orchards across the counties (districts) of northwestern Fujian has been extremely severe, spreading from localized outbreaks to contiguous occurrence, with a worsening trend. Adults and nymphs suck plant sap
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Control methods for yellowing disease in citrus cultivation
In many places in our province, citrus yellowing disease occurs commonly in citrus orchards, causing weakened tree vigor, reduced yield, degraded quality, and premature tree decline. Some fruit growers believe it is all citrus greening disease and adopt the practice of cutting down trees, causing unnecessary production losses. In fact, yellowing disease, as long as it is not
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A Detailed Guide to Renewal Methods for Aged Mandarin Orange Trees
For aged trees caused by advanced tree age, overly dense planting, damage from pests and diseases, or poor management, renewal and rejuvenation should be carried out promptly. There are three methods: main branch renewal, skeleton renewal, and rotational renewal. 1. Main branch renewal. This method is suitable for severely declining plants. The method is: at
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Detailed Explanation of Flower Promotion Measures and Methods for Mandarin Oranges
In our country, mandarin oranges are a very common and highly popular fruit. According to what the editor has learned, mandarin oranges from Guangxi are quite famous, which shows that mandarin oranges are suited to living in places with relatively hot weather, and in the north it is impossible to grow delicious mandarin oranges.
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Pest and Disease Control Methods in Navel Orange Cultivation
Following the general policy of prevention first and integrated management, with agricultural control as the foundation, according to the patterns of pest and disease occurrence and development, reasonably applying chemical control, biological control, physical and mechanical control and other measures according to the time and local conditions, economically, safely, effectively and simply controlling
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Management Methods for Early Fruiting and High Yield of Navel Orange in the Third Year After Planting
Before planting navel orange seedlings, careful land preparation must be carried out by digging large holes or trenching, and sufficient base fertilizer must be applied. After the planted seedlings survive, the following measures are mainly used to promote fruiting and high yield in the third year. Scientific fertilization. Navel orange seedlings planted in the current year generally survive in half a month. After survival,
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Control Methods for Three Major Physiological Diseases in Navel Orange Cultivation
For fruit cracking disease, the first step is to select varieties (lines) with strong cracking resistance. Generally, varieties (lines) with oval fruit shape, small navel or closed navel have better cracking resistance, such as Newhall and others; second, scientific management should be strengthened to enhance tree vigor. Especially during the dry period after the plum rain season and before the autumn rains arrive
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Key Technical Points for Spring and Summer Field Management of Navel Orange Orchards
Spring comes early in southern Jiangxi, warm and rainy. From March to June, navel oranges are in the phenological stages of spring shoot growth, flowering and fruit set, and the first and second physiological fruit drop. This is also the dangerous period when more than 10 kinds of pests and diseases, such as citrus flower bud midge, mites, scale insects, tortrix moths, longhorn beetles, anthracnose, resin disease, and canker, rapidly multiply, spread, and proliferate.
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How to Take Emergency Protective Measures When a Navel Orange Orchard Suffers Freeze Damage
Reporter Yan Zhangwen reports: With the weather continuing cold and rainy, can navel orange trees withstand it? On the morning of January 28, the reporter conducted a telephone interview with Fang Yiwen, director of the Municipal Citrus Science Research Institute. Director Fang Yiwen, who was observing freeze damage on site, told the reporter that in parts of Ningdu, Yudu, Ganxian and other places in the north and central regions, some navel orange orchards at higher altitudes have already suffered freezing damage, with ice forming on the leaves; as temperatures drop, the freezing line will continue to advance toward the southern areas, posing a greater threat to navel orange trees. According to the weather forecast, the rain, snow and freezing weather will continue until the end of this month, and temperatures will continue to drop. There is no time to lose in doing a good job of protecting orchards against freezing, and Fang Yiwen urged the broad community of fruit growers to immediately implement the following emergency measures.
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