【摘要】 荔枝不同品种受荔枝瘤瘿螨[Acerialitchii(Keifer)]为害的情况差异极显著,4号和19号2品种受害最严重。同一树冠上不同层次之间受害率和虫口密度差异极显著;不同方位之间受害情况差异不显著,而虫口密度差异显著。各生态因子对荔枝瘤瘿螨若螨消长作用大小顺序为气温>湿度>天敌>降雨;成螨为天敌>降雨>湿度>气温;整个种群数量为气温>湿度>天敌>降雨。更多还原

【Abstract】 Litchi varieties were found to have highly significant difference in damages caused by Aceria litchii (Keifer). Litchi varieties No.4 and No.19 were highly infested. A. litchii (Keifer) was observed to show no significant difference in distribution but significant difference in population density in different orientations of the litchi canopy, as well as significant differences in distribution and population density among different layers of the canopy. The gray sequence of four ecological factors to A. litchii (Keifer) was studied. The result showed that the gray sequence of the ecological factors to nymphs was in the order of temperature > humidity > natural enemy > rainfall; to adults, natural enemy > rainfall > humidity > temperature; and to the population, temperature > humidity > natural enemy > rainfall.更多还原