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Identification and Control Methods of Soybean Cyst Nematode Disease
Soybean cyst nematode disease, also called "huolongyangzi" disease, is caused by nematodes parasitizing the roots of soybean. Diseased plants have poorly developed root systems, with a marked reduction in lateral roots, slow growth, stunted plants, yellowing stems and leaves, small pods with shriveled seeds, or no seed set, and even death of the entire plant. When diseased plants are pulled up and examined, many needle...
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Integrated control methods for three pests of spring soybean
I. Cutworms. The main pest damaging local crops is the yellow cutworm (Agrotis segetum). 1. Damage characteristics: The larvae mostly bite off seedlings at ground level, causing missing plants and broken rows. After the main stem becomes lignified, they feed on the epidermis of the roots near the ground surface, causing root damage that affects the root's ability to absorb water, causing the plant to gradually wilt and die. ...
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What to Do When Open-Field Melons Get Mosaic Virus Disease? Symptom Identification and Control Methods
Symptoms: In the early stage of the disease, the leaves show mosaic mottling interwoven with yellow-green and dark green, the leaves become smaller, and the leaf surface is wrinkled, uneven, and curled. The main vine is distorted and stunted, the plant is dwarfed, the melons are small, and the fruit surface has mottled patches of alternating light and dark, or slight bump-like protrusions. Causes: The incidence of mosaic virus disease has been relatively high in recent years...
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What are the control methods for small fruit and fruit cracking in melons?
As temperatures rise, melons grow rapidly, and the critical period for field management has arrived. Recently, some farmers have reported that small fruit and fruit cracking occur during melon growth. How can this be solved? To prevent small fruit, strengthen fertilizer and water management in the early stage to promote vegetative growth. According to variety characteristics and cultivation...
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How to treat bacterial leaf blight in greenhouse melons? Detailed control methods
This disease is a bacterial disease that mainly damages leaves, petioles and young melons, and can cause damage throughout the entire growth period. When infected at the seedling stage, the cotyledons show water-soaked yellow sunken spots. When leaves are infected, the early stage shows light green water-soaked spots on the underside of the leaves, and gradually the leaf surface turns into light brown necrotic lesions. After drying, the lesion area becomes brittle and perforated. To prevent this disease...
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Detailed Guide to Symptom Identification and Control Methods for Asparagus Stem Blight
Asparagus is a valuable vegetable with excellent taste and quality. With the continuous improvement of people's living standards, the demand for asparagus in domestic and international markets is growing. Because asparagus has strong drought tolerance, it is particularly suitable for cultivation in the Tianjin area. However, as the number of planting years increases and the area expands, the occurrence of stem blight becomes more and more severe, with some fields...
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Occurrence Patterns and Control Methods of Asparagus Stem Rot
I. Symptom Characteristics Asparagus stem rot mainly affects young spears. Young spears may be infected as soon as they emerge from the soil. Water-soaked, irregular lesions appear on the young stems, expand around the stem, causing the stem tissue to disintegrate and rot, ultimately leading to the death of the young spears. Even if mildly affected plants do not die, their vigor is greatly reduced, the above-ground stems and leaves are weakened, the young stems are thin and weak, and the yield...
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Detailed Explanation of the Causes of Mass Asparagus Death and Prevention and Control Methods
The causes of asparagus plant death are as follows: 1. Asparagus likes light. In September-October 2007, just when the aboveground parts of asparagus were growing vigorously and accumulating nutrients to lay the foundation for a high yield the following year, there was an unexpected continuous rainy period the likes of which had not been seen for many years. Light was severely insufficient, causing asparagus growth to stagnate, nutrient accumulation to decrease, and stress resistance to...
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Symptom Identification and Control Methods of Wheat Rosette Stunt
I. Disease Development Pattern Wheat rosette stunt is a viral disease spread by the vector Laodelphax striatellus (small brown planthopper). There are two peak periods of virus transmission and infection by the small brown planthopper on wheat: the first peak period is after wheat emergence, and the second peak period is after wheat turns green. As temperatures gradually rise, the overwintering generation of small brown planthoppers begins to feed and move on wheat seedlings, spreading the virus.
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Spring Wheat Soil Pest Control Methods
Soil pests are mainly white grubs, mole crickets and wireworms, among which wireworms cause the most serious damage to wheat. After the Spring Festival, the peak period of soil pest damage runs from mid-March to early April, when they bite through wheat roots and stems, causing severe gaps and broken rows of seedlings and greatly affecting wheat yield. In recent years, soil pests have become...
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