摘要
The functional response of adult Nabis kinbergii （Hemiptera： Nabidae） to density of diamondback moth Plutella xylostella （Lepidoptera： Plutellidae） was investigated under laboratory conditions. Holling＇ s （1959） type Ⅱ model was found to be a good fit for the observed functional response of this predator. The numbers of P. xylostella consumed increased with temperature from 15℃ to 35℃. The maximum number of prey killed was observed at 35℃, with average of 10.3 and 8.3 forth instar larvae consumed by adult females and males of N. kinbergii, respectively. The predation of N. kinbergii on P. xylostella increased with successive immature stages. The number of prey consumed by predators decreased as the body size of prey increased. An average of 131 eggs or 95 larvae of P. xylostella were killed by a single of female adult in 24 hours at 24＂C. The pupae of P. xylostella were observed to be eaten by fifth instar nymphs and adults N. kinbergiiin numbers of less than an average of 0.7 pupae per predator in 24 hours at 24＂C. Predation preference by N. kinbergii was also investigated. The number of P. xylostella and Myzus persicae killed by female N. kinbergii was not significantly different, but males killed significantly more P. xylostella than M. persicae. Both eggs and larvae of P. xylosteUa were killed in significantly greater number than those of Pieris rapae in the same feeding arena.
成年 Nabis kinbergii 的功能的反应(半翅类：Nabidae ) 到有菱形斑纹的蛾 Plutella xylostella 的密度(鳞翅目：Plutellidae ) 在实验室条件下面被调查。Holling' s (1959 ) 类型Ⅱ模型被发现是一好为这个食肉动物的观察功能的反应合适。P 的数字。消费的 xylostella 从 15 ℃与温度增加了到 35 ℃。杀死的猎物的最大的数字向前在 35 ℃被观察，与 10.3 和 8.3 的一般水准中间形态幼虫由 N 的成年女性和男性消费了。kinbergii 分别地。N 的捕食。P 上的 kinbergii。xylostella 与连续最不成熟的年龄增加了。当猎物的身体尺寸增加了，食肉动物消费的猎物的数字减少了。131 个鸡蛋的 Anaverage 或 P 的 95 幼虫。xylostella 被女成年人的一个单身者在 24 ℃在 24hours 打死。P 的蛹。xylostella 被观察被第五个中间形态美女和成年人 N 吃。在数字的 kinbergii 不到 0.7 蛹的一般水准每在 24 小时 at24 ℃的食肉动物。由 N 的捕食偏爱。kinbergii 也被调查。P 的数字。xylostella andMyzus persicae 由女 N 杀死了。kinbergii 不是显著地不同的，但是男性们显著地杀死了更多的 P。xylostella 比 M。persicae。P 的鸡蛋和幼虫。xylostella 在一样的喂竞技场 Pieris rapae 比那些在显著地更大的数字被打死。
