Asparagus disease prevention
1, brown spot: The disease mainly damage the stems, branches and mimicry leaves of asparagus, but mainly twigs and mimicry. Severe disease often causes premature death of plants.
Prevention and control measures: Use 75% chlorothalonil and 50% carbendazim to mix the above agents into 500-800 times liquid for spraying. Normally, spray once every 10 days or so, and the outbreak period can be sprayed once every 7 days. 40% polysulfide suspension 600 times, 14% chlorine 300 times, 50% Humic acid copper wettable powder 500 times control effect is also good.
2. Asparagus leaf blight: Leaf blight causes large elliptic scars on the stems and lateral branches of plants, with clear brown-red to black borders. The disease infection causes premature defoliation of the asparagus strains in the summer until the entire culm is dead.
Control measures: Increase organic fertilizers; Strengthen management, remove diseased bodies in time after harvest; Combine with prevention of stem blight, spray 30% basic copper sulfate (Green Debao) 400 times solution or 1:0.5 in the initial stage of disease. 100 times of Bordeaux mixture 50%, Huppe copper WP 500 times, 47% Garnett WP 800 times. In severe cases, it is also possible to spray separately 75% chlorothalonil wettable powder 600 times 58% metalaxyl manganese zinc wettable powder 500 times. The drug was stopped 7 days before harvest.
3. Asparagus Stem Blight: The disease occurs mainly on stems, lateral branches or leaves. The spots are swollen or short-lined around the hydrophilic edges and show edema.
Prevention and control measures: The principles of prevention and comprehensive prevention should be adhered to. Use suitable planting fields; thoroughly clean the garden; rational fertilization; do a good job in field management. Chemicals prevention and control should implement the principle of “prevention over treatmentâ€. After the tender stems are sprayed, they must be sprayed in time to receive good results. In the initial stage of onset, it is sprayed once every 5-7 days, and the peak time of onset is 1-3 days. Rain falls within 4 hours after spraying and should be re-sprayed. In order to avoid drug resistance, 2-3 kinds of drugs can be used alternately. For example, 50% carbendazim 500-600 times, used for soil disinfection and spraying during onset. 70% mancozeb WP can prevent and control water spray by 175-250 g/mu. World 1000 times liquid + 75% chlorothalonil 600 times spray. 50% benzoate EC, 800-1000 times, spray control. Dafudan WP, 800-fold dilution.
Vermicelli Bag,Vermicelli Packaging Bag,Paper Bag For Vermicelli,Vermicelli Bag For Dried Vermicelli
Ningxia ZhaiXianSong Commercial and Trading Co.,Ltd. , https://www.nxupin.com