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What are the control methods for chestnut spider mites?
The chestnut spider mite, also known as the conifer small claw mite, damages chestnut leaves, causing them to lose chlorophyll and develop small yellowish-white spots; in severe cases the leaves scorch and turn brown, resulting in reduced yield. It overwinters as winter eggs laid on the leaf scars, rough bark crevices and branching points on the underside of 1- to 4-year-old branches, and begins hatching in late April to early May of the following year, which coincides with the chestnut bud-break period...
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Integrated Pest and Disease Control Methods for Greenhouse Cucumbers in Spring
I. Common Diseases in Spring 1. Downy mildew (1) Occurrence characteristics: persistent (long-term companion), devastating (rapid spread, outbreaks). (2) Occurrence conditions: High humidity: relative humidity above 83% favors disease development, (water droplets or water film on leaf surface), spore germination and invasion. Optimum temperature: 15-20°C. Nutritional status...
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How to prevent and control pests and diseases in early spring eggplant? Key technical points to master
For eggplant seedlings raised in early spring, the main focus is preventing and controlling soil-borne diseases: damping-off, rhizoctonia rot and sclerotinia rot. For seedbed soil disinfection, mix 50 kg of seedbed soil with 20 g of 68% Jinlei water-dispersible granules and 10 ml of 2.5% Shileshi suspension concentrate, sift the soil and mix well, then fill nutrient pots, or spread it over the seedling bed. During the seedling stage, spray 0.1%-0.2% monopotassium phosphate...
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Pest and Disease Control Techniques for Greenhouse Cultivation of Water Spinach
1. The main diseases are damping-off and stem rot at the seedling stage, caused by low temperatures and excessively high relative humidity. Reducing humidity can alleviate the occurrence of diseases on the 12582 Nongxintong website. Spray with Ridomil at 700 times dilution or Kameitong at 800 times dilution for control. 2. The main pests are mites and red spider mites, which can be controlled with Karmante at 1000 times...
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What are the key points for pollution-free control of white rust in water spinach?
Symptoms: The lesions appear on the underside of the leaves. On the upper surface of the leaves, pale yellow to yellow spots first appear, then gradually turn brown. The lesions expand, and on the underside of the leaves white raised blister-like spots form, nearly round or oval to irregular in shape, sometimes merging into larger blisters. In the later stage, the blisters rupture and release white sporangia. When the leaves are severely affected, the lesions are dense and the diseased...
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What are the control methods for striped flea beetles on rapeseed?
In recent years, the striped flea beetle has become another major insect pest during the seedling stage of rapeseed in Hongta District. The striped flea beetle is commonly known as the cabbage flea and the soil flea, and its larva is called the white maggot. This insect not only flies but also jumps well, making it difficult to catch on the leaves. When disturbed, it jumps to the ground or to the field-edge ditch, and then quickly flies back onto the leaves to feed. It often gathers in groups on the undersides of leaves to feed,...
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Broadleaf weeds during the rapeseed growing season can be controlled with herbicides
Rapeseed sclerotinia stem rot is one of the important diseases in rapeseed production. It can occur from the seedling stage to maturity, with damage to the stem being the most severe. Control methods: First, increase the application of phosphorus and potassium fertilizers and apply only a small amount of nitrogen fertilizer. At the same time, open drainage furrows to facilitate drainage, thin the seedlings properly, and maintain a reasonable density. Spray paclobutrazol to improve lodging resistance. A reasonable density...
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How to control aphids on rapeseed? These technical points need to be mastered
Aphids, commonly known as greasy bugs, are the main insect pest of rapeseed in Linxiang District, occurring in all major rapeseed-producing areas; when drought is severe in winter and spring, the pest is heavier in plots lacking irrigation conditions. Aphid damage mainly occurs from the bolting stage to the maturity stage of rapeseed, and untimely or improper control can cause a certain amount of yield loss. 1. Rapeseed aphids...
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Key Pest and Disease Control Methods and Techniques for Chestnut
1. Select good varieties and prepare enough scion wood. Select good varieties. For the improvement of chestnut orchards, the three new varieties Dahongpao, Qingmaozao and Hongmaozao should be selected. These new varieties have been trial-planted in our city and have the characteristics of early fruiting, high quality, high yield, large fruit and strong stress resistance, and are suitable for promotion and planting throughout the city. Scion collection and storage...
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What to Do When Water Spinach Gets White Rust? A Detailed Guide to Prevention and Control Methods
First, implement a 2-to-3-year crop rotation with other vegetable varieties. Second, before sowing, dress the seeds for sterilization at a ratio of 300 g of 35% metalaxyl per 100 kg of seeds; third, in the early stage of the disease, spray with 50% copper metalaxyl wettable powder at 6000 to 7000 times dilution, or with 72.2% propamocarb aqueous solution at 8000 times dilution, applying once every 7 to 10 days...
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