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Occurrence patterns and control methods of soybean sclerotinia stem rot
Soybean sclerotinia stem rot occurs commonly in Heilongjiang Province. In 2001, the disease was relatively severe in Raohe County. In continuous soybean cropping fields, the disease incidence rate was 3%-30%, and in individual fields following American sunflower, the incidence rate reached 50%. In severely affected fields, the crop was even completely lost. 1 Causes of the disease 1.1 Climatic conditions In mid-to-late July, continuous low temperature and scant sunshine
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How to prevent and control spring soybean virus disease? Detailed explanation of occurrence patterns and control methods
Viral disease is a major disease of spring soybean, causing about 15% yield loss in normal outbreak years and over 50% yield loss in severe outbreak years. 1 Symptoms After spring soybean is infected, the upper leaves first show light yellow-green mottling, and the mesophyll bulges in a blister-like manner along the veins; then the mottling and wrinkling become increasingly severe, the leaves become deformed, the mesophyll protrudes, the leaf margins curl downward, plant growth is clearly stunted, the number of pods decreases, the pods are small and slender, and the pods show deformed symptoms such as flattening and bending. After infected spring soybean matures, the seeds are clearly smaller, and light brown streaks can appear on the seeds.
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Occurrence and Control Methods of the Sesame Capsule Borer
The sesame capsule borer is one of the major pests of sesame. It mainly damages sesame. It commonly occurs in China's major sesame-producing areas such as Henan, Hubei, Anhui and Jiangxi, generally reducing yields by 10%-20%, and by up to 30% in severe cases, significantly lowering sesame quality. In response to its occurrence, a
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Occurrence Characteristics and Control Measures of Sesame Phytophthora Blight
Sesame Phytophthora blight is a devastating disease. It mainly affects the base of the sesame stem, the stem, the capsules and the leaves. After the stem base is affected, it initially appears dark green and water-soaked, then turns reddish brown, sunken, with longitudinal cracking of the cortex. After the stem and capsules are affected, the diseased parts appear dark green and water-soaked,
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Causes and Control Methods of Citrus Sunburn
Citrus sunburn is a common physiological disease in hot seasons, mainly affecting leaves, fruit and bark. The occurrence of this disease is mainly caused by exposure to high temperatures and scorching sun. At noon and in the afternoon during hot weather, the local temperature of orange trees exposed to direct sunlight rises sharply
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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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Occurrence and Control Methods of Pests and Diseases in Hami Melon Cultivation
I. Bacterial Leaf Spot Symptoms: In the early stage, water-soaked lesions appear near the veins on the underside of leaves. The lesions expand rapidly and merge together, with a yellow halo at the edges. Control method: In the early stage of the disease, spray the leaves with 77% Duoning at 500 times dilution or 3% Zhongshengjunsu at 800 times dilution 2-3 times, once every 4-5 days.
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Occurrence Characteristics and Control Methods of Soft Rot in Lily Bulbs
Lily, a perennial herbaceous bulbous plant of the genus Lilium in the family Liliaceae, is mainly distributed in temperate regions of the Northern Hemisphere such as eastern Asia, Europe and North America. More than one hundred varieties have been found worldwide, and China is its most important center of origin, with more than fifty native species, making it the natural distribution center of the genus Lilium.
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The Occurrence Mechanism and Control Methods of Bottle Gourd Fruit Spot Disease
Bottle gourd, aliases: sweet gourd, sweet bottle gourd, bottle gourd, Jingjie chui, Longmi melon, Tian gua, long gourd, flat gourd; phylum Angiospermae, a species under the genus Lagenaria in the family Cucurbitaceae, a variety of the genus plant bottle gourd (Lagenaria siceraria), an annual climbing herb. It differs from the bottle gourd (original variety) in
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Symptom Identification and Control Methods of Cucumber Phytophthora Blight
Cucumber (scientific name Cucumis sativus Linn, English name Cucumber), a plant of the genus Cucumis in the Cucurbitaceae family. Also called hu gua and qing gua. The fruit is oily green or emerald green, with soft small spines on the surface. It is widely cultivated throughout China and is now widely grown in temperate and tropical regions.
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