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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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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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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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Causes of Pumpkin Fruit Cracking and Control Methods
Main symptoms: Fruit cracking occurs in both young and mature pumpkins, producing longitudinal, transverse or diagonal cracks on the fruit surface. The cracks vary in depth and width; severe cracks can reach deep into the flesh, exposing the seeds, and the injured surfaces of the cracks become suberized; minor cracks are only small fissures. If young fruit cracks, by the time the pumpkin matures it generally becomes severe...
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Strawberry Summer Pest and Disease Control Methods and Precautions
Applying Boron and Iron Fertilizer Can Improve Strawberry Quality. Strawberries are currently being marketed in large quantities, but as strawberries grow and fruits are harvested, farmers neglect the application of micronutrient fertilizers, and combined with unreasonable fertilization, this causes a deficiency of trace elements needed for strawberry growth, especially with boron and iron deficiency symptoms being particularly obvious, which has already affected strawberry yield...
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What Are the Symptoms of Phosphorus Deficiency in Peach Trees? Detailed Guide to Prevention and Control Methods
I. The Role of Phosphorus in the Growth and Development of Peach Trees Phosphorus has two roles in the growth and development of peach trees. On one hand, it can strengthen tree vigor, maintain healthy tree growth, promote flower formation, lead to earlier fruiting, promote the maturation of fruit and seeds, increase sugar content, and improve fruit quality. On the other hand, it can enhance the peach tree's adaptability to the external environment...
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Peach Tree Pest and Disease Control Methods and Technical Key Points
1. Note that peach trees are chlorine-sensitive crops. Applying chlorine-containing fertilizer easily causes root rot and yellowing leaves; in mild cases the tree vigor weakens, and in severe cases the plant dies. Therefore, do not apply chlorine-containing fertilizers. 2. Be careful about watering during the flowering period. Watering during flowering can easily lower soil temperature and reduce soil air content, affecting root growth and absorption, leading to...
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Peach Tree Powdery Mildew: Control Methods and Key Technical Points
Control methods for peach tree powdery mildew: 1. After leaf fall, remove diseased leaves to reduce the source of infection. 2. Spray fungicides for protection during the growing season: in the early stage of the disease, spray 0.2 to 0.3 degrees Baume lime sulfur mixture, or a 2000 to 3000 times dilution of 15% wettable powder triadimefon, or a 1500 to 2000 times dilution of thiophanate-methyl. 3. Improve ventilation and light penetration...
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How to control alternate bearing in plums? These methods are essential
Plum trees have been cultivated in China for more than 3,000 years. The Book of Songs records "the blossoms are peach and plum" and "you throw me a peach, I return you a plum." The Guanzi states, "On the five fertile soils, the trees suited to them are plum and apricot." This shows that plum trees and apricot trees have a long history of cultivation in China and adapt well in both the north and the south. But for a long time, our...
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Control Methods and Technical Key Points for Excessive Growth of Greenhouse Potatoes
Mepiquat chloride: During the bud stage to flowering stage of potatoes, foliar spraying of 60-120 mg/L mepiquat chloride (use the lower concentration limit at the bud stage) can inhibit the growth of the aboveground part of the plant, increase yield, and increase the proportion of large and medium tubers. Chlormequat chloride: During the plant bud stage to early flowering stage, use 2000-2500 mg/L chlormequat...
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