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根据1999年全国农作物重大病虫发生趋势预测会商会”讨论结果及目前掌握的情况分析,预计:今年全国主要农怍物病虫仍将较重发生,其中小麦病虫中等偏重发生,程度接近去年;棉铃虫等棉花害虫为偏重发生,轻于重发生的前几年;水稻病虫发生可能轻于去年;蝗虫、草地螟、玉米螟等害虫偏重至大发生。 小麦病虫 预计小麦病虫发生总的趋势为中等偏重,其中南方麦区病害重于虫害,北方麦区病虫并重,穗蚜等害虫的发生重于去年。 水稻病虫 预计水稻病虫继续呈中等偏重态势,并仍以迁飞性及钻蛀性害虫和流行性病害为主。
According to the discussion results of the Chamber of Commerce for Predicting Major Pest and Disease Occurrences in 1999 and the analysis of the current situation, it is expected that the major pests of pests in the country will still occur heavier this year, with the moderate incidence of wheat pests occurring close to last year ; Cotton bollworm and other cotton pests are prevalent, lighter than re-occurring a few years ago; pests and diseases of rice may be lighter than last year; locusts, meadow borers, corn borers and other pests focus on the occurrence of large. The overall trend was moderately weighted, of which the disease in the southern wheat area was heavier than that in the pests, and the occurrence of pests in the northern wheat area was more severe than that in the previous year.Water pests Rice pests and diseases are expected to continue to be moderately heavier and still relocate Fly and boring pests and epidemic diseases.