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Early control methods for four onion diseases
The main onion diseases are downy mildew, gray mold, rust and soft rot, and they should be controlled early. Downy mildew and gray mold Downy mildew mainly damages the outer leaves and flower stalks of onions. The suitable temperature for the disease is 10-20°C, and it can occur from April to May or from November to December. At the beginning of the disease, affected plants show oblong or band-shaped sunken lesions on the outer leaves...
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How to prevent and control walnut bacterial blight? These methods are very practical
The pathogen of walnut bacterial blight generally overwinters in twigs or buds, and in the following spring exudes bacterial fluid that spreads via wind and rain, mainly damaging young fruit, leaves and tender twigs. Management methods: 1. Overwintering management. After leaf fall, apply Husu Jiangjun to the trunk and branches to hinder the pathogen from multiplying on the tree body, providing insulation, disinfection and frost protection. At the same time, spray Husu...
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Detailed Explanation of Control Methods for Walnut Bacterial Black Spot
Walnut bacterial black spot mainly damages walnut fruit, with a diseased fruit rate of 10%-40%, causing the fruit to turn black, rot, and drop early, and the walnut kernels to shrivel. In addition, it also damages leaves and tender shoots, with damage rates reaching 20%-40% in some plots. [Symptoms] On affected green young fruit, small brown oil-soaked spots initially appear on the rind...
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Integrated Control Methods and Technical Key Points for Walnut Branch Blight
Walnut branch blight is caused by fungal infection and mainly damages branches and trunks. It occurs in all regions, with a general diseased plant rate of 20-30%, and in severe cases the diseased plant rate reaches over 80%, causing massive branch dieback and directly affecting tree growth as well as walnut yield and quality. Therefore, timely control is necessary to curb the disease and promote tree...
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Control Methods for Sclerotial Root Rot in Walnut Seedlings
Sclerotial root rot, also called southern blight, mostly affects one-year-old seedlings, causing the cortex of the main root and lateral roots to rot, the aboveground parts to wither and die, and sometimes the entire plant to die. 1. Disease symptoms: Under high temperature and high humidity, white silky mycelium is produced at the base of the seedling root collar and on the surrounding soil and fallen leaves, after which small sclerotia grow...
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Control Methods and Technical Key Points for Hickory Flower Bud Midge
The hickory flower bud midge is the main pest damaging hickory flower buds. Because the insect body is tiny and concealed, its occurrence period is short, and the damage consequences are severe, once the effective control period is missed, hickory yield will be seriously affected. To effectively safeguard this year's hickory yield, scientific and technical personnel have proposed the following on how to carry out effective control: First, seize...
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What are the control methods for the hickory flower bud midge?
The hickory flower bud midge is the main pest harming hickory flower buds. Because the insect is tiny and concealed, its occurrence period is short, and the damage consequences are severe, once the effective control period is missed it will seriously affect hickory yield. To effectively safeguard this year's hickory yield, scientific and technical personnel put forward the following on how to carry out effective control: First, grasp...
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How to apply fungicides for effective control of carrot black spot
(1) Symptoms. Stems, leaves and petioles can all be infected. Leaf infection mostly starts from the leaf tip or edge, producing irregular dark brown to black lesions, with the surrounding tissue becoming increasingly discolored; when humidity is high, black mold grows on the lesions, and in severe cases the lesions merge, the leaf edges curl upward, and the leaves wither early. When stems are infected, the lesions are oblong, dark brown, ...
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How to effectively control red spider mites on red-fleshed honey pomelo
Spring is the early stage when red-fleshed honey pomelo puts out roots, grows spring shoots, grows flower spikes, blooms, and sets young fruit. During this period, pest and disease damage, fertilizer deficiency, and drought have a direct impact on the pomelo tree's strong shoots, strong flowers, and fruit-setting rate, and it is a key period for increasing the yield of the year. Various spring management technical measures must be taken in a timely manner to promote strong shoots...
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What are the key points of radish pest and disease control techniques
This disease mainly damages cruciferous vegetables such as Chinese cabbage, bok choy, cabbage, and radish. It occurs commonly across the country, and is severe in northern regions. (1) Symptoms: It mainly damages the leaves. At the early stage of the disease, small grayish-brown round spots are scattered on the leaf surface, which then gradually expand into irregular round lesions, with the center turning grayish-white, and 1 to...
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