Chitosan oligosaccharide is mainly used to prevent and control various diseases of vegetables caused by fungi, bacteria and viruses. It is particularly effective for diseases that are not as effective as protective fungicides. It has a strong inhibitory effect on pathogens and induces disease resistance on plants. Effective control of soil-borne diseases such as fusarium wilt, blight, damping off, root rot, etc. It is suitable for watermelon, winter melon, cucumber, bitter melon, muskmelon and other melons, pepper, tomato and other solanaceous fruits, cabbage, celery, cabbage and other leafy vegetables.
Reference application method: (take chitosan oligosaccharide preparation water as an example)
① Seed soaking Can mainly prevent bacterial wilt, fusarium wilt, black rot, etc. on tomato and pepper, melon fusarium wilt, powdery mildew, wilt, black spot, etc., and viral diseases of vegetables. It can be used before sowing. 5% chitosan oligosaccharide water solution 100 to 200 times for seed soaking for 6 hours.
② Root irrigation To prevent and control root diseases such as fusarium wilt, bacterial wilt, root rot, etc., use 5% chitosan oligosaccharide water solution 1000~1500 times to irrigate the roots, with an interval of 7~10 days, and use 2~3 times in a row.
③ Spraying To prevent and control stem and leaf diseases, use 5% chitosan oligosaccharide water 800~1000 times, evenly spray on stems and leaves at the initial stage of the disease, and use 2~3 times at an interval of about 7 days.
To control soft rot such as Chinese cabbage, 5% chitosan oligosaccharide water can be used to spray 800~1000 times. The first spray is before or at the early stage of the disease, and then every 5 days for a total of 5 sprays.
To prevent tomato virus disease, use 5% chitosan oligosaccharide aqueous solution 600~800 times, spray once at the seedling stage, and start at the beginning of the disease, spray once every 5~7 days, 3~4 times in a row.
To prevent and control late blight of tomato and potato, 5% chitosan oligosaccharide water is sprayed at 800-1000 times of liquid conventionally, sprayed once every 7-10 days, and sprayed 2-3 times in a row.
To prevent and control soil-borne diseases and disinfect the seedbed, spray 600~800 times of 5% chitosan oligosaccharide water agent per square meter evenly, or evenly sprinkle 56 kg of fine soil into the soil, and then sow or transplant. Severely diseased fields can be doubled. It is better to use it as a protective agent before the onset of the disease.
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