油菜“花而不实”是一种由于缺少硼素营养而引起的生理性病害。多发生在甘蓝型油菜上,白菜型油菜尚未发现。当1956年甘蓝型油菜在我省开始推广时奉化县就有发生。此后由于甘蓝型油菜具有比白菜型品种高产稳产、抗病性强等方面的优点,栽培面积也不断扩大,这一方面推动了油菜生产的发展,另一方面油菜“花而不实”的情况也 Rape “flower but not real” is a lack of boron nutrition due to physiological diseases. Occurred in the cabbage rape, cabbage rape yet to be found. When 1956 cabbage rape in our province began to promote Fenghua County have occurred. Since then, because rapeseed has the advantages of high and stable yield and strong disease resistance compared with cabbage varieties, the cultivated area is also expanding. On the one hand, it promotes the development of rapeseed production. On the other hand, and also