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综合病虫越冬(发生)基数、作物布局、气象和水文条件分析,预计2005年全国主要农作物病虫害仍呈偏重发生态势。其中,小麦条锈病、水稻螟虫、蝗虫、草地螟、稻纵卷叶螟、稻飞虱等重大病虫害将严重或偏重发生。全年主要病虫发生面积近3.3亿hm2次,需要防治面积4亿hm2次左右。1发生
Based on the overwintering (occurrence) baselines, crop layout, meteorological and hydrological conditions of pests and diseases, it is estimated that the main pests and diseases in the country will still be on the rise in 2005. Among them, wheat stripe rust, rice stem borer, locusts, meadow moth, rice leaf roller, planthopper and other major pests and diseases will be serious or biased. The main pests and diseases occurred throughout the year nearly 330 million hm2 times, need to control the area of 400 million hm2 times. 1 happened