甘兰型油菜生育期长、抗逆性强、需肥量大、产量高,深受广大农民群众的欢迎,种植面积正在日益扩大。但由于甘兰型油菜需肥量大,缺乏经验的农村社员往往在移栽时使用过多的未经腐熟的有机肥料,结果在高温的作用下发酵分解,招致种蝇产卵危害,对油菜籽的产量造成一定的损失。笔者从1974—1980年先后在宋埠公社宋埠大队及赤岸公社沿里大队等地从事甘兰型油菜的技 Brassica napus has long growth period, strong resistance, large amount of fertilizer required, high yield, welcomed by the majority of peasants, planting area is growing. However, due to the large amount of oil required for the type of Brassica napus, rural residents who are inexperienced often use excessive amounts of uncompounded organic fertilizers during transplanting. As a result, fermentative decomposition takes place under the action of high temperature, resulting in spawning of the species fly. Seed yield caused some losses. The author from 1974-1980 in Song port commune Song port brigade and Chian commune along the brigade and other places engaged in the technology of Brassica napus