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日本一家化学公司研制成一种含氮生物碱,可预防作物连作病害。施用后,对西红柿、茄子等蔬菜因连作发生的青枯病、灰霉病等有较好预防效果；用于花卉、果树等作物亦有效。
A chemical company in Japan developed a nitrogen-containing alkaloid to prevent plant-to-plant diseases. After application, tomatoes, eggplant and other vegetables due to continuous crop bacterial wilt, gray mold and so have a better preventive effect; for flowers, fruit trees and other crops are also effective.