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Cause analysis and control methods for celery petiole cracking
Celery petiole cracking mainly shows as the stem base splitting open together with the petiole. The first cause of cracking is boron deficiency; the second is growth being hindered under low temperature and drought conditions. In addition, sudden high temperature and high humidity, with the plant absorbing too much water, cause the tissue to fill with water rapidly, which can also cause cracking. Control methods: first, apply...
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Detailed Guide to Identifying and Controlling Common Strawberry Pests and Diseases
Strawberries are grown under plastic film in greenhouses, where the high temperature and high humidity inside the greenhouse create even more favorable conditions for the occurrence of pests and diseases. The common pests and diseases of strawberry and their control measures are described below: I. Common diseases 1. Leaf spot. It mainly damages leaves, and the typical symptom is gray or grayish-brown round spots centered on the lesion, with purple...
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What are the control methods for black heart in strawberries?
Symptoms of strawberry black heart disease: the first inflorescence grows deformed, the inflorescence, heart leaves, fruit stalks and leaf stalks are extremely short and cannot emerge, the flowers do not open normally at the base, and the edges of new leaves dry up and turn black. In severe cases, the entire first inflorescence and all new leaves dry up and turn black, which farmers call "black heart disease". Control measures: 1. Reduce chemical fertilizer...
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What to Do About Nitrogen Deficiency in Spinach? Detailed Control Measures
Nitrogen deficiency in spinach: leaves are pale green, the basal leaves (older leaves) turn yellow and this gradually spreads upward, and they turn brown when dry. Plants are stunted, with few branches (tillers), and show premature aging. Control method: apply sufficient base fertilizer, with 2000-3000 kg of decomposed manure, 30-35 kg of phosphate fertilizer, and 10-15 kg of potassium fertilizer per mu. 2-...
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How to prevent and control downy mildew in spinach? Detailed explanation of prevention and integrated treatment methods
The disease is caused by a fungus called spinach downy mildew. It mainly affects the upper surface of the leaves; the lesions are pale yellow, irregular in shape and varied in size, with a diameter of 3-17 mm and indistinct edges. After the lesions expand, they join together into patches, and in the later stage they turn brown and the leaves die; on the underside of the leaves, a grayish-purple mold layer forms on the lesions. The disease spreads from the outer leaves...
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The Harm of Strawberry Verticillium Wilt and Its Comprehensive Control Methods
Strawberry Verticillium wilt is a soil-borne disease. It has been an important factor affecting and troubling the expansion of strawberry production in recent years. Because strawberry is a perennial plant, continuous cropping in the same field for many years causes a large accumulation of pathogens in the soil, and combined with factors such as declining varietal disease resistance and poor field management, it leads to strawberry...
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Key Technical Points for Pollution-Free Pest and Disease Control in Strawberries
Symptoms: Strawberry black mold mainly affects nearly ripe fruit. If harvested fruit is not promptly handled and packaged, it is even more susceptible to infection, causing large-scale fruit rot. When the disease first appears, the fruit surface shows light brown water-soaked lesions, which then rapidly soften and rot, producing a gray cotton-like growth, on which granular black mold develops, namely the mycelium and conidia...
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Symptom Identification and Integrated Control Methods for Strawberry Bud Blight
Strawberry bud blight is a soilborne fungal disease with a worldwide distribution. It is strongly saprophytic in soil and is an important root disease of many crops. In addition to strawberry, it also affects more than 160 species of cultivated and wild plants, including cotton, soybean and vegetables. On strawberry, it mainly damages buds, new shoots, stipules and the bases of leaf petioles, causing seedling-stage damping-off...
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Disease Prevention and Control Measures and Technical Key Points for Greenhouse Strawberries
Strawberry leaf blight mainly affects leaves, petioles, fruit stalks and calyxes. 1. Symptoms. In the early stage of the disease, small dull dark purplish-brown spots appear on the leaves, which then expand into irregular lesions; the color of the lesion edges and centers changes little, and the symptoms of this disease are difficult to distinguish from those of brown spot disease in its early stage. Brown spot disease and leaf blight...
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Causes and Control Methods of Deformed Strawberry Fruit in Greenhouses
During the cultivation of greenhouse strawberries, fruits often appear overly fat or overly thin, with deformed shapes such as cockscomb-like or flat forms. Such fruits not only affect strawberry quality but also reduce their commercial value. In order to reduce or even avoid the formation of such deformed fruits, the author now introduces the causes and control methods as follows:...
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