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一、江苏省农业害虫的类型据估计,我国每种作物的害虫种类在100—300种。在这些害虫中有80%以上由于与自然天敌间处于相互制约和保持相对稳定的低密度状态,始终不超过经济允许水平。所以江苏省稻、麦、棉、杂粮等主要农作物上的重要害虫仅数十种。这些农业害虫,由于生态因素的差异,表现了在年度间、地区间,其发生数量和为害程度上有很大差别。现将江苏省近年来主要农业害虫归纳于表1。
First, the types of agricultural pests in Jiangsu Province It is estimated that each species of pests in our 100 100 species. More than 80% of these pests have not exceeded the allowable economic level due to their mutual restraint with natural predators and the relatively stable low density. Therefore, Jiangsu Province, rice, wheat, cotton, miscellaneous grains and other major crops on the main pests only dozens. Due to the difference of ecological factors, these agricultural pests show great differences in the annual, inter-regional, their occurrence and the degree of damage. The main agricultural pests in Jiangsu Province in recent years are summarized in Table 1.