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综合越冬基数、气象条件、栽培与种植结构等因素分析,预计2014年黑龙江省农作物生物灾害总体趋势为中等偏重发生,发生程度将重于常年,接近上年。稻瘟病、马铃薯晚疫病、玉米大斑病有重发趋势。有利于水稻稻瘟病发生,一是水稻品种单一化种植比例较大,主栽品种抗病性下降。今年水稻种植面积仍会有所增加,垦稻12、龙粳系列、空育131、五优稻4号等主栽品种在一些主产区占比将达60%。其中,空育131曾在2005、2006年全省大面积发病,2013
Based on the analysis of the factors such as the base of overwintering, meteorological conditions, cultivation and planting structure, it is estimated that the general trend of crop biological disasters in Heilongjiang Province will occur moderately heavier in 2014, and the occurrence will be heavier than perennial, close to the previous year. Rice blast, potato late blight, corn leaf spot recurrence trend. Is conducive to the occurrence of rice blast, first, a larger proportion of rice varieties planted, the main cultivars decreased resistance. This year, the area under rice cultivation will still increase. Major cultivars such as Kenyao 12, Longjing Series, Kongyu 131 and Wuyoudao 4 will account for 60% of the main producing areas this year. Among them, Kongyu 131 was diagnosed in a large area in 2005 and 2006, 2013