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Greenhouse Bean Disease Prevention and Control Methods and Key Technical Points
I. Symptoms of bean rust: It mainly affects the leaves, and in severe cases also affects the petioles and pods. In the early stage of the disease, small pale yellow spots appear on the underside of the leaves, later turning rusty brown, raised and forming small pustule-like blisters, then expanding into uredinia, and after the epidermis ruptures, reddish-brown powder is released. This is the urediniospore. II. Bean powdery mildew...
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What are the control methods for the jujube gall midge, a pest of jujube trees?
This insect, commonly known as the jujube leaf maggot, is found in jujube-growing areas across the country, where its larvae damage the tender leaves, flower buds and young fruit of jujube trees. Damaged tender leaves curl into a tube shape, turn purplish red, become hard and brittle, and soon blacken and wither. Once flower buds are damaged they cannot open, and they turn yellow and drop off. Damaged young fruit cannot develop and grow properly; at about the size of a soybean they turn yellow and drop off...
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How to prevent and control jujube anthracnose? Sharing practical methods
1. Symptoms: Infected fruit first shows red-brown spots, after which the lesions gradually enlarge, surrounded by a pale yellow halo; finally the lesion color turns dark brown, slightly sunken but then expanding slowly, and the lesion shapes are diverse, including round, oval or spindle-shaped. The flesh inside the lesion gradually changes from green to brown, becomes necrotic,...
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Identification and Control Methods of Jujube Rust Disease Explained in Detail
(1) Symptoms: Jujube rust disease only damages the leaves. In the early stage, pale green small spots are scattered on the underside of the leaves, later gradually becoming raised and dark yellow, which are the uredinia of the pathogen. The uredinia are irregular in shape and mostly occur on both sides of the midrib, at the leaf tip and base. After the surface of the lesion ruptures, yellow urediniospores are scattered. On the upper side of the leaf, corresponding to the uredinia, green...
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Grape Disease Prevention and Control Methods in the Rainy Season
Grape downy mildew is one of the important diseases of grapes and can occur in all parts of our country. It mainly damages the leaves, causing early defoliation, and can also harm new shoots and fruit clusters. The main symptom is the formation of polygonal yellow spots on the upper surface of the leaves, which later die, turn brown, and produce white downy mildew on the underside. Grape downy mildew...
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How to Prevent Flower Drop in Oil Beans? Detailed Practical Control Methods
In snap beans, flower drop occurs under adverse conditions such as high temperatures above 30°C or windy weather, soil that is too dry or too wet, insufficient nutrients, and weak light, so field management should be strengthened to prevent flower and pod drop. Trials have shown that applying biological potassium fertilizer can reduce the occurrence of flower and pod drop.
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What to Do About Mango Flower and Fruit Drop? Causes and Control Methods
Causes of Mango Flower and Fruit Drop and Control Methods
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What are the control methods for cucumber target leaf spot?
Cucumber target leaf spot is a fungal disease, and the pathogen is Corynespora cassiicola, so it is also called Corynespora leaf spot. It has been reported in various parts of China in the past, but it was not very serious. In recent years, with the continuous development of protected cultivation, the disease has worsened year by year and has become an important leaf disease in protected cucumber production, and may also cause damage to tomatoes and many other vegetables.
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Detailed explanation of common diseases of Siraitia grosvenorii and their control methods
Common diseases of Siraitia grosvenorii and their control
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