【摘要】 聚集度指标测定表明，草间小黑蛛在柑桔树上呈聚集分布，聚集是由环境因素引起的。方差分析表明在树冠不同部位的聚集强度无显著差异。更多还原

【Abstract】 Determination value of crowding level indicated that Erigonidium graminicolum appears an assembling distribution in critus trees,which was caused by the environmental factors.As for the assembling intensity,there was no significant difference among the various parts of the crown according to variance analysis.更多还原