The data collected from April 26 to June 2 in 2003 showed that individuals of silverleaf whitefly distributed at the height where the medium and old-age leaves blended.

• 初步结果显示银叶粉蝨族群个体在番茄植株上集中于中下层叶片交际之处，将试验取样之来源设定在茎顶下数第10,11,12叶，以肉眼当叶计数。