Prevention and treatment of boron deficiency in celery

(1) Symptoms and causes of the disease are characterized by abnormal hypertrophy and shortening of the petiole and bending toward the medial side. The medial tissue of the curved part becomes brown, gradually cracking, and the petioles are distorted so that they are chapped. Gradually browning from the edge of young leaves inward, and finally the new leaves are necrotic. The reason for the lack of boron is due to the lack of boron in the soil, and to the fact that there are many other nutrients in the soil, which inhibits normal absorption. In addition, boron deficiency is also prone to occur under conditions of high temperature and drought.
(2) Control methods If the soil is deficient in boron, 1 kg of borax can be applied per 667 square meters to supplement the deficiency of boron. After the symptoms of boron deficiency are found, a 0.1%-0.3% borax aqueous solution can be used for foliar spray.

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