The leaves of lettuce and oil wheat have brownish edges recently. What happened? How to prevent?
According to the description, it should be a physiological disease. The main reason for the appearance of brownish edges is due to frequent recent rains. After the rain is fine, the stomata on the leaves of oil wheat and lettuce is blocked, which seriously affects the plant's respiration, transpiration, and photosynthesis, resulting in the trace elements calcium and boron in the soil. Can not be absorbed in time, the appearance of brown dry edge directly affects the quality of the listing of vegetables, causing severe sales can not be.
Control methods: As a result of recent continuous rain, the increase in humidity, lettuce and oil-wheat soft rot common occurrences, comprehensive prevention and control should be used, can be used 3% endotoxin 800 times liquid + Beijing Bo calcium 800 times liquid + boron fertilizer 1000 Times of liquid or 20% Yezizole 800 times liquid + agricultural vigor 750 times liquid + boron 1000 times liquid, sprayed once every 5 to 7 days, spraying once on the second day after rain, can effectively reduce the occurrence.
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