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| 1 | Effects of mummy consumption on fitness and oviposition site selection on Harmonia axyridis显示文摘Intraguild predation(IGP)has been commonly reported between predators and parasitoids used as biological control agents as predators consuming parasitoids within their hosts.However,the effect of parasitoid-mummy consumption on the fitness of the predator and subsequent oviposition site selection have not been well studied.In our study,we conducted two laboratory experiments to examine the influence of Aphidius gifuen-sis Ashmead(Hymenoptera:Braconidae)mummies as prey on fitness and subsequently oviposition site selection of Harmonia axyridis(Pallas)(Coleoptera:Coccnellidae).Re-sults indicate that when H.aryridis was reared on A.gifiuensis mummies only,its larval development was prolonged,and body weight of the 4th instar larvae and newly emerged adults,and fecundity decreased.Moreover,H.axyridis did not exhibit oviposition pref-erence on plants infested with unparasitized aphids or aphids parasitized for shorter than 9 days.However,compared with plants with mummies(parasitized≥9 days),H.axryridis laid more eggs on plants with unparasitized aphids.In contrast,H.axryridis previously fed with A.gifuensis mummies did not show a significant oviposition preference between plants with unparasitized aphids and those with mummies(parasitized≥9 days).Overall,our results suggest that mummy consumption reduced the fitness of H.axyridis.Although H.axyridis avoided laying eggs on plants with A.gifuensis mummies,prior feeding ex-perience on A.gifuensis mummies could alter the oviposition site preference.Thus,in biological control practice,prior feeding experience of H.axyridis should be carflly considered for reduction of IGP and increase of fitness of H.axyridis on A.gifuensis. | Xing-Lin Yu Yi Feng Zhu-Jun Feng Phongsakorn Chana Guan-Xiong Zhu Peng-Liang Xia Tong-Xian Liu | 2020 | Insect Science2020，27，5： | 1 |
| 2 | 植物组成型防御对蚜虫的影响显示文摘植物的防御体系可以分为组成型和诱导型,两者共同抵御蚜虫的侵害。本文主要从植物对蚜虫的组成型防御进行综述,主要介绍了角质层、叶色、茸毛等植物形态特征与抗蚜性的关系,以及植物的次生代谢物质在蚜虫防御中的重要作用。以期阐释组成型防御在植物—蚜虫二级营养结构以及植物—蚜虫—天敌三级营养结构中的重要作用,并对植物组成型防御在抗蚜方面的应用进行展望。 | 王永克 梁勇 王少卫 罗兵 | 2022 | 中国植保导刊2022，42，10： | 0 |
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