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Symptom Identification and Control Methods of Sorghum Black Bundle Disease
Symptoms Sorghum black bundle disease is a vascular bundle disease, also known as tracheomycotic blackening disease. When symptoms appear on leaves, brown streaks form on the leaf veins, mostly presenting as large necrotic spots along one or both sides of the main vein, causing the leaves and leaf sheaths to turn purple or brown; in severe cases the leaves dry up, the stalks become slightly thicker, and branching occurs on the upper part of diseased plants. Cross-sectioning the diseased stalk...
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How to treat grape water rot? Detailed control methods
Based on your description, it is likely grape white rot, one of the most important grape diseases, especially in rainy years when it often occurs together with anthracnose, causing great damage. Grape white rot can harm clusters, canes and leaves. After the cluster and rachis are infected, they become light brown and water-soaked rot, and the whole cluster or part of the small clusters...
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Control Methods and Technical Key Points for Grape Downy Mildew
Control methods: 1. Remove fallen leaves and diseased branches, bury them deep or burn them. 2. Timely pinch off growing tips, prune, drain and weed, and apply more phosphorus and potassium fertilizer. 3. At the early stage of the disease, that is, after July, apply chemicals as soon as slight lesions are seen on the underside of leaves. The chemicals include: Pubo, Ridomil, Sandofan, metalaxyl, Shuangmeiyitejing, etc., used alternately, spraying 4 to 5 times in a row...
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What are the control methods for grape black pox?
1. Eliminate the source of the pathogen. After the grapes drop their leaves in autumn, remove the fallen leaves and diseased clusters and bury them deep in a centralized pit. The old bark scraped off must be burned immediately. When the grape buds begin to swell in spring, spray with 3-5 degrees Baumé lime sulfur plus 0.3% sodium pentachlorophenate. 2. Strengthen cultivation management. In combination with summer pruning, carefully prune out diseased branches, diseased leaves and diseased fruit to reduce...
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How to Prevent and Control Grape Leaf Blight? A Full Analysis of Practical Methods
Grape leaf blight starts on the lower leaves of the plant and gradually spreads upward. It can occur from June to November, with July to September being the peak period. It is severe in rainy years and in poorly managed vineyards. Prevention and control methods: 1. After autumn, thoroughly clear away fallen leaves in the vineyard to reduce or eliminate the overwintering source of the disease. During the grape growing season...
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What are the control methods for grape bunch stem blight?
Common grape diseases include: grape bunch stem blight, gray mold, powdery mildew, anthracnose, black pox, white rot, sunburn, and many other diseases. Here is an introduction to how grape bunch stem blight is controlled: grape bunch stem blight mainly damages young flower buds, the rachis, or young fruit, causing them to shrivel and dry up, resulting...
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Causes and Control Methods of Rice Deadheart Disease
Key Points of Rice Dry Seedbed Cultivation Technology 1. Apply sufficient base fertilizer: In combination with deep ploughing or leveling the field with irrigation water, apply 30-40 kg of rice-specific compound fertilizer, ammonium bicarbonate and 20-25 kg of ordinary calcium superphosphate per mu, applied all at once as a middle fertilizer. Fields with broad bean as the previous crop should receive a larger amount, while vegetable or potato fields should receive a smaller amount. 2. Transplant shallowly and sparsely at the right time...
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Occurrence and Control Methods of Jackfruit Stem-End Rot and Fruit Rot
The African giant snail, also known as the French snail, is a pest that harms pineapple. It mainly bites the base of the fruit from June to August when the fruit is ripe, leaving holes of varying depths, which makes the pineapple prone to infection by pathogens and rot, thereby reducing the commercial value of the fruit and even making it inedible. Control methods: (1) Manual capture. In the African giant snail...
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Green control methods for rice diseases, insect pests and weeds
Rice seedling rot refers to the death of rice seeds and seedlings during the seedling-bed stage (that is, seed rot, bud rot and seedling death), and can be divided into two major categories: physiological and infectious. Physiological seedling rot refers to that caused purely by adverse environmental conditions; infectious seedling rot mostly refers to adverse environmental conditions inducing weakly parasitic fungi such as Pythium, Achlya, Fusarium and Rhizoctonia...
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How to control pineapple mealybug? Detailed control methods
The pineapple mealybug, scientific name Dysmicoccus brevipes (Cockerell), belongs to the order Homoptera, family Pseudococcidae. Dysmicoccus brevipes is the most commonly seen species. Damage symptoms: adults and nymphs damage pineapple rhizomes, leaves, fruits and seedlings by sucking their sap. On affected leaves, symptoms first appear on the lower leaves, gradually fading upward to yellow and finally...
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