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通过调查研究，明确了中国梨木虱在梨园及树冠内均呈聚集型分布；最佳取样为平行跳跃式和５点取样法；最适取样数量一般为每园２０～３０株
Through the investigation and study, it is clear that the Chinese pear psylla are aggregated in pear orchard and canopy. The best sampling is parallel hopping and 5-point sampling. The optimum sampling quantity is 20-30