Sun Li Juan, Yi Wei Xian, Zheng Chang Ying
Shandong Province Key Laboratory for Integrated Management of Plant Disease & Insect Pest, Qingdao Agricultural University, Qingdao 266109, Shandong, China.
Huangdao Entry-Exit Inspection Bureau, Qingdao 266555, Shandong, China.
Ying Yong Sheng Tai Xue Bao. 2017 Oct;28(10):3403-3408. doi: 10.13287/j.1001-9332.201710.032.
In order to make clear the suitability of eggs of Plutella xylostella as foodstuff of Orius minutus and the predatory and control ability of the bug to P. xylostella, the influence of praying on eggs of P. xylostella on development and reproduction of O. minutus was studied indoors with Myzus persicae as reference. The predation functional response was included to evaluate the control ability of O. minutus to P. xylostella. The results showed that O. minutus could finish its generation and reproduce offspring when fed on eggs of P. xylostella. The developmental durations of nymphal bugs (♀: 12.3 d, ♂: 12.2 d), the length of body of adult bugs [♀: (2.13±0.01) mm, ♂: (1.91±0.00) mm], the width of body of adult bugs [♀: (0.87±0.01) mm, ♂: (0.71±0.01) mm], the fecundity per female (12.7±1.1), the pre-oviposition period [(5.1±0.6) d] and the oviposition period [(3.7±0.4) d] all had no significant difference from those of treatment group of M. persicae; the longevity of adult bugs [♀: (10.7±1.4) d, ♂: (9.1±1.3) d] was longer than that of treatment group of M. persicae [♀: (8.5±0.5) d, ♂: (6.4±0.3) d]; the survival rate of nymphal bugs [(65.0±6.8)%] was lower than that of treatment group of M. persicae [(80.0±8.2)%], and the percentage of females was low. The predation functional responses of O. minutus to P. xylostella were all in accord with Holling2 equation. The largest amounts of caught per day (N) of the 1st, 2nd, 3rd, 4th and 5th instar nymphal bugs to eggs of P. xylostella were 7.5, 16.3, 23.3, 29.1 and 38.7, respectively; the N of the female and male adult to eggs of P. xylostella was 39.0 and 26.9, respectively; the N of the 5th instar nymph to lower instar larva of P. xylostella was 41.3; and the N of the female and male adult to lower instar larva of P. xylostella was 40.8 and 23.9, respectively. Single female and male pray eggs of P. xylostella up to (711.3±58.1) and (535.4±30.6), lower instar larvae of P. xylostella up to (371.9±52.0) and (253.9±32.3) during their whole lifetime, respectively. O. minutus could be reared with eggs of P. xylostella, and O. minutus has a good ability to control P. xylostella.
为明确小菜蛾卵作为东亚小花蝽食物的适宜性以及该蝽对小菜蛾的捕食和控制能力，以桃蚜为对照，在室内研究了取食小菜蛾卵对东亚小花蝽生长发育和繁殖的影响。通过捕食功能反应来评价东亚小花蝽对小菜蛾的控制能力。结果表明，东亚小花蝽取食小菜蛾卵能够完成世代发育并繁殖后代。若虫发育历期（♀：12.3 d，♂：12.2 d）、成虫体长[♀：(2.13±0.01) mm，♂：(1.91±0.00) mm]、成虫体宽[♀：(0.87±0.01) mm，♂：(0.71±0.01) mm]、单雌产卵量(12.7±1.1)、产卵前期[(5.1±0.6) d]和产卵期[(3.7±0.4) d]与取食桃蚜处理组相比均无显著差异；成虫寿命[♀：(10.7±1.4) d，♂：(9.1±1.3) d]长于取食桃蚜处理组[♀：(8.5±0.5) d，♂：(6.4±0.3) d]；若虫存活率[(65.0±6.8)%]低于取食桃蚜处理组[(80.0±8.2)%]，且雌虫比例低。东亚小花蝽对小菜蛾的捕食功能反应均符合HollingⅡ型方程。1龄、2龄、3龄、4龄和5龄若虫对小菜蛾卵的日最大捕食量(N)分别为7.5、16.3、23.3、29.1和38.7；雌、雄成虫对小菜蛾卵的N分别为39.0和26.9；5龄若虫对小菜蛾低龄幼虫的N为41.3；雌、雄成虫对小菜蛾低龄幼虫的N分别为40.8和23.9。单头雌、雄东亚小花蝽一生分别最多可取食小菜蛾卵(711.3±58.1)粒和(535.4±30.6)粒，取食小菜蛾低龄幼虫分别最多为(371.9±52.0)头和(253.9±32.3)头。东亚小花蝽可以用小菜蛾卵饲养，且对小菜蛾有较好的控制能力。
