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 結(jié)果表明:在小黑瓢蟲與紅蜘蛛“單種捕食者?單種獵物”作用系統(tǒng)中,小黑瓢蟲雌成蟲對紅蜘蛛各蟲態(tài)的取食呈現(xiàn)選擇性,其中最喜取食卵,其次為幼螨,最不喜食成螨。