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南阳地区属大豆的适生区。全区大豆常年播种面积为150—180万亩,占秋粮总播面积的15—20％和秋粮总产量的12％,对本区经济发展起着重要作用。近年来,由于气候、品种等方面的原因,大豆紫斑病粒严重地影响了大豆的品质和产量。调查表明,紫斑粒达20—30％,大豆减产8—10％;达30—50％,减产10—15％;达50％以上,减产30—50％。近两年来,我们对大豆紫斑粒进行了调查研究,以便为进一步引进繁育良种及科学管理种植提供科学依据。
Nanyang is a suitable area for soybean. The perennial soybean planting area of the region is 150-180 million mu, accounting for 15-20% of the total sowing area of autumn grain and 12% of the total output of autumn grain, which plays an important role in the economic development in this suburb. In recent years, due to climate, variety and other reasons, soybean purple spots seriously affect the quality of soybean and yield. The survey showed that purple speckle reached 20-30%, soybean cut 8-10%; up to 30-50%, cut 10-15%; up to 50%, cut 30-50%. In the past two years, we conducted a survey on soybean purple spot in order to provide scientific basis for the further introduction of breeding seeds and scientific management.