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黑心病该病是由生理失调引起的心叶生长点死亡、变黑。每英亩以15磅硝酸钙加100加仑水喷洒,是一种有效的防治措施。最好每周喷一次,或看苗施用,并注意使顶部幼嫩的心叶充分湿透。高温、生长迅速以及水分不足在往引起病害,土壤含盐量和含氮量过高,亦会促使黑心病发生。棕色条纹此病的主要特征是叶柄内侧发生棕色坏死锈斑。这种棕色组织最初发生在第一片小叶下方,随后往下蔓延到大约1/2～2/3的叶柄内侧.小
Black heart disease The disease is caused by the physiological imbalance of heart-leaf growth point of death, darkening. Sprinkling 15 pounds of calcium nitrate per 100 acres of water per acre is an effective control. It is best to spray once a week, or see Miao application, and pay attention to the top of the tender heart leaves fully wet. High temperature, rapid growth and lack of water cause disease in the past, soil salinity and nitrogen content is too high, will also promote black heart disease. Brown stripes The main feature of the disease is brown necrosis of the medial petioles. This brown tissue initially occurs below the first leaflet and then spreads down to approximately ½ to 2/3 of the medial petiole.