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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 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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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, later turning 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, non-functional sporangia. When the leaves are severely affected, the lesions are dense and the diseased...
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What chemicals are used to control white rust in water spinach?
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, once every 7 to 10 days...
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What to do when water spinach gets white rust? Detailed control methods
①Use disease-free seeds or treat seeds with 0.3% of seed weight of ridomil-mancozeb seed dressing. ②This disease is limited to infecting Convolvulaceae vegetables; after 2~3 years of crop rotation, the control effect is good. ③Pay attention to field drainage and thin out plants for ventilation. ④At the early stage of the disease, spray 48% metalaxyl-mancozeb wettable powder, 40% metalaxyl-copper wettable powder...
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What are the control methods for white rust in water spinach?
Because of the high temperature and frequent rain after early summer, water spinach is prone to white rust. Once the disease occurs, it not only reduces the yield but also affects the quality. 1. Symptoms At the early stage of the disease, spots first appear on the upper surface of the leaves as pale yellow to yellow spots, which later gradually turn brown. The spots are relatively large. On the underside of the leaves, white raised blister-like pustules form, nearly round or elliptical to irregular, sometimes coalescing into larger pustules. Later, the pustules rupture and release white sporangia. When the leaves are severely damaged, the spots are dense, the diseased leaves become deformed, and the leaves fall off.
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How to prevent and control white rust in water spinach, all in one article
1. Practice a 2- to 3-year crop rotation with other vegetable varieties. 2. Before sowing, mix the seed for sterilization at a ratio of 300 g of 35% metalaxyl per 100 kg of seed; 3. 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, once every 7 to 10 days...
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Wheat stripe rust can be managed by a zone-based strategy of treating key spots to protect the wider area
Wheat stripe rust is a serious biological disaster that has long affected the safe production of wheat in China. In years when the disease is common, wheat yields are reduced by 10%-20%, and in years of severe epidemic, losses can reach more than 60%, or even leave wheat with almost no harvest. Based on a comprehensive analysis of factors such as the amount of inoculum, weather conditions and variety distribution, it is predicted that in 2011...
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Which fungicides give good control of sorghum rust?
Symptoms Sorghum rust begins to develop around the heading stage of sorghum. Red or purple to light brown small spots form on the leaves, then as the pathogen spreads, the spots enlarge and form elliptical raised uredinia (summer spore pustules) on the leaf surface; when they rupture, they expose rice-brown powder, namely urediniospores (summer spores). Later, telia form in the original spots...
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How to carry out integrated control of cowpea rust and powdery mildew in greenhouses?
At the early stage of the disease, spray 70% thiophanate-methyl wettable powder at 500 times dilution, or 40% copper oxychloride wettable powder at 600 times dilution, 50% sulfur suspension concentrate at 300 times dilution, or Fenbiqing at 150 times dilution. Spray 2 to 3 times consecutively, at 5 to 7 day intervals.
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