The results showed that in the single predator - single prey system of d . catalinae and t . nr . fijiensis , the adult female of d . catalinae had significantly different feeding preference in selecting the stages of t . nr . fijiensis , with the most preference of the eggs followed by larva , protonymph , deutonymph and adult respectively 结果表明：在小黑瓢虫与红蜘蛛“单种捕食者?单种猎物”作用系统中，小黑瓢虫雌成虫对红蜘蛛各虫态的取食呈现选择性，其中最喜取食卵，其次为幼螨，最不喜食成螨。
