摘要
对5个梨园梨上瘿螨发生情况的抽样调查结果,经聚集指标、Taylor的幂法则和Iwao法的统计分析得出,梨上瘿螨越冬自然种群在果园中的空间分布型为聚集分布,其分布的基本成分为个体群;同时建立了梨上瘿螨越冬种群数量调查的理论抽样数量计算公式。
The spatial distribution pattern of the natural overwintering population of Epitrimerus pyri （Nalepa） was analysed by calculating indices of aggregation,parameters of Taylor model and Iwao model. The result indicated that the spatial distribution pattern of the natural overwintering population of Epitrirnerus pyri （Nalepa） was aggregate distribution and basic compotent of distribution was individual group. The theoretical sampling quantity formula was determined.
出处
《甘肃农业科技》
2007年第4期5-7,共3页
Gansu Agricultural Science and Technology
关键词
梨上瘿螨
越冬
空间分布型
Epitrimerus pyri （Nalepa）
Overwintering population
Patial distribution patterns
