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菌核病是油菜的一种主要病害,对其产量的影响一般在二成左右,严重的达五成以上。秦油2号是陕西省农垦科教中心培育的一个杂交油菜种,由于产量优势强,近几年种植面积迅速扩大。现已见到的品种介绍和引种示范报道都介绍该品种比其它品种感菌核病轻,菌核病对产量影响小,认为是属“耐菌核病”品种。1986年秋我站引进种植6.5亩。根据我市植保站的预报,本地1987年油菜菌核病为偏重发生年,4月6日同等类型田块甘油5号病株率已高达83.4%,而秦油2号只有2.5%,只有植株底部叶片有少量病斑。4月15日秦油2号进入花末期,甘油5号基秆侵入率已达22.4%,而秦油2号基杆上还未发现病斑,于是忽视了防治。然而在5月6日我们发现秦油2号平均46.97％的茎秆已被菌核病菌侵入为害,茎秆为害株率比感病品种甘油5号还重0.43%,严重的高达66.67％。这说明秦油2号虽有一定的抗耐病能力,但若不注意防治,仍会造成较大的损失。
Sclerotinia sclerotiorum is a major disease, its impact on the yield is generally about 20%, a serious up to 50%. QinYu No.2 is a hybrid rapeseed cultivate cultivated in Shaanxi Province Science and Education Center. Due to its superior yield, the planting area has rapidly expanded in recent years. Now we have seen the species introduction and introduction of demonstration reports have introduced the varieties than other varieties of susceptible strains of sclerosis, Sclerotinia production on the impact of small, that is a “resistant sclerotinia” varieties. Autumn 1986 I plant 6.5 acres of planting. According to the prediction of the plant protection station in our city, the local 1987 sclerotinia sclerotiorum occurred year on year. On April 6, the rate of strain 5 on the same type of field plots was as high as 83.4%, while that of QinYou 2 was only 2.5%. Only plants Bottom leaves a small amount of lesions. On April 15, Qinyou 2 entered the late flowering stage, the penetration rate of glycerol 5 base stem reached 22.4%, while no spot was found on the base rod of Qinyou No.2, so it ignored the control measures. However, on May 6, we found that on average, 46.97% of the stalks of Qinyou No.2 were invaded by Sclerotinia sclerotiorum, and the rate of stalk damage was 0.43% heavier than that of the susceptible variety Glycerin 5, which was as high as 66.67%. This shows that although there is a certain number of Qin oil resistance to disease resistance, but if you do not pay attention to prevention and treatment, will still cause greater losses.