繁育寄主对稻螟赤眼蜂寄生行为及寄生能力的影响

›› 2015, Vol. 58 ›› Issue (7): 783-790.doi:

繁育寄主对稻螟赤眼蜂寄生行为及寄生能力的影响

宋静, 黄静, 王雷英, 李元喜^*

(南京农业大学植物保护学院, 农作物生物灾害综合治理教育部重点实验室, 南京 210095)

出版日期:2015-07-20 发布日期:2015-07-20
作者简介:宋静, 女, 1989年4月, 安徽安庆人, 硕士研究生, 研究方向为昆虫化学生态学, E-mail: 2011102101@njau.edu.cn

Effects of rearing host on parasitization behavior and capacity of Trichogramma japonicum (Hymenoptera: Trichogrammatidae)

SONG Jing, HUANG Jing, WANG Lei-Ying, LI Yuan-Xi^*

(Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China)

Online:2015-07-20 Published:2015-07-20

摘要/Abstract

摘要： 【目的】繁育寄主影响赤眼蜂的生物学特性，为明确米蛾 Corcyra cephalonica (Stainton)卵繁育的稻螟赤眼蜂 Trichogramma japonicum Ashmead是否和二化螟Chilo suppressalis (Walker)卵繁育稻螟赤眼蜂在防治二化螟上有差别，及田间用米蛾卵作为稻螟赤眼蜂续代寄主的可行性，本实验观察了羽化自不同寄主的稻螟赤眼蜂的寄主选择和寄生行为，研究了两种繁育寄主对稻螟赤眼蜂寄生能力的影响，为田间防治水稻螟虫提供参考信息。【方法】室内利用选择试验观察了由米蛾卵和二化螟卵繁育出的稻螟赤眼蜂对两种寄主的选择趋性及在两种寄主上的寄生行为和寄生能力，统计了羽化子代蜂的寿命。【结果】由二化螟卵繁育的稻螟赤眼蜂表现出了对二化螟卵的选择偏好，而米蛾卵繁育的稻螟赤眼蜂在米蛾卵和二化螟卵间没有表现出寄主选择偏好。寄主搜寻时间不受繁育寄主及供试寄主的影响，卵表探测时间和穿刺及产卵时间不受繁育寄主的影响，但同一寄主繁育的稻螟赤眼蜂在米蛾卵上的卵表探测时间显著长于在二化螟卵上的卵表检测时间。除二化螟卵繁育蜂寄生二化螟卵时的寄生率（36.95%）和羽化率（45.68%）较低外，米蛾卵繁育蜂寄生米蛾卵或二化螟卵以及二化螟卵繁育蜂寄生米蛾卵等3组处理间的寄生率、羽化率均无显著差异，各处理组间子代蜂寿命也无显著差异。【结论】繁育寄主影响稻螟赤眼蜂的寄主选择和寄生能力，但不影响寄生蜂搜寻寄主的能力和寄生行为。

关键词: 稻螟赤眼蜂, 寄生行为, 寄主选择, 米蛾, 二化螟, 寄生率, 羽化率, 寿命

Abstract: 【Aim】 The rearing host affects biological characteristics of Trichogramma. In order to know the differences between Trichogramma japonicum Ashmead reared on Corcyra cephalonica (Stainton) eggs and reared on Chilo suppressalis (Walker) eggs in the control effect on Ch. suppressalis, and also the possibility of using Co. corcyra eggs as the alternative host of T. japonicum in the field, we observed the host preference and parasitization behavior of T. japonicum emerged from different rearing hosts, and investigated the effects of rearing host on the parasitization capacity of T. japonicum, so as to provide basic information for the control of rice borer with Trichogramma. 【Methods】 The host preference of T. japonicam reared on Co. cephalonica eggs (TjCc) and Ch. suppressalis eggs (TjCs), respectively, were observed in choice tests in the laboratory. The parasitization behavior and capacity of TjCc and TjCs on eggs of Ch. suppressalisand Co. cephalonica, respectively, were investigated. 【Results】 TjCs preferred Ch. suppressalis eggs to Co.cephalonica eggs, while TjCc did not show preferences. The host searching time was not significantly affected by either rearing host or host for parasitization, and both the outside host examination time and ovipostion time were not significantly affected by rearing host. However, the outside host examination time of both TjCc and TjCs on Co. cephalonica eggs was significantly longer than that on Ch. suppressalis eggs. The parasitism rate (36.95%) on Ch. suppressalis eggs and the emergence rate (45.68%) of TjCs were lower, respectively, than those in other three combinations (TjCc-Cc, TjCc-Cs and TjCs-Cc) among which no significant differences were found. The longevity of emerged wasps was not significantly different among the four treatments. 【Conclusion】 The rearing host affects the host preference and parasitization capacity of T. japonicum, but does not affect the host searching ability and parasitization behavior of the wasp.

Key words: Trichogramma japonicum, parasitization behavior, host preference, Cocyra cephalonica, Chilo suppressalis, parasitism rate, emergence rate, longevity

宋静, 黄静, 王雷英, 李元喜. 繁育寄主对稻螟赤眼蜂寄生行为及寄生能力的影响[J]. , 2015, 58(7): 783-790.

SONG Jing, HUANG Jing, WANG Lei-Ying, LI Yuan-Xi. Effects of rearing host on parasitization behavior and capacity of Trichogramma japonicum (Hymenoptera: Trichogrammatidae)[J]. , 2015, 58(7): 783-790.

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