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| 取食扶桑绵粉蚧对六斑月瓢虫生长繁殖和捕食偏好的影响 |
| Effects of feeding on Phenacoccus solenopsis Tinsley on development, reproduction and predation preference of Cheilomenes sexmaculata Fabricius |
| 投稿时间：2024-04-22 修订日期：2024-06-01 |
| DOI： |
| 中文关键词: 六斑月瓢虫 扶桑绵粉蚧 玉米蚜 生长繁殖 捕食偏好 |
| 英文关键词:Cheilomenes sexmaculata Phenacoccus solenopsis Rhopalosiphum maidis development and reproduction predation preference |
| 基金项目:广西科技基地和人才专项；国家自然科学基金青年基金项目 |
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| 中文摘要: |
| 六斑月瓢虫Cheilomenes sexmaculata Fabricius是我国华南地区常见的捕食性天敌之一，可捕食多种农林害虫。为了明确取食扶桑绵粉蚧Phenacoccus solenopsis Tinsley对六斑月瓢虫的影响，本研究以取食玉米蚜Rhopalosiphum maidis Fitch作为对照，探讨六斑月瓢虫连续2个世代取食扶桑绵粉蚧的生长发育、繁殖力和捕食偏好情况。结果表明，六斑月瓢虫取食扶桑绵粉蚧发育历期显著延长，F1和F2代发育历期分别为15.43和14.38 d。饲喂粉蚧的六斑月瓢虫体重显著增加，F1和F2代的体重分别为8.95和8.59 mg。取食粉蚧对六斑月瓢虫的总存活率和产卵量无显著影响，F1和F2代总存活率分别为58.33%和62.92%，产卵量分别为503.94和597.80粒。六斑月瓢虫取食粉蚧的F1、F2代瓢虫组及食蚜组成虫对猎物的选择性指数（D）均大于1，表明六斑月瓢虫成虫对玉米蚜表现出捕食偏好。综上表明六斑月瓢虫2代内能够较好地适应扶桑绵粉蚧，可将该粉蚧列入六斑月瓢虫的生物防治范围。 |
| 英文摘要: |
| Cheilomenes sexmaculata Fabricius is one of the common predatory natural enemies in southern China, feeding on a variety of agricultural and forestry pests. In order to clarify the effects of C. sexmaculata feeding on Phenacoccus solenopsis Tinsley, rearing on Rhopalosiphum maidis Fitch as a control treatment, the development, reproduction and predation preference of C. sexmaculata feeding on P. solenopsis were studied in two consecutive generations. The results showed that C. sexmaculata feeding on P. solenopsis developed significantly slower than on R. maidis, with 15.43 and 14.38 d for the F1 and F2 mealybug-feeding generations, respectively. Newly-emerged adult weight of C. sexmaculata feeding on P. solenopsis increased significantly, with 8.95 and 8.59 mg in the F1 and F2 mealybug-feeding generation, respectively. There were no significant differences in total survival and fecundity when fed on mealybugs, with 62.92% and 60.00% survival, and 597.80 and 533.90 eggs laid in F1 and F2 generations, respectively. The prey selectivity index D of adult C. sexmaculata in F1, F2 mealybug-feeding groups and aphid-feeding group were all greater than 1, indicating that the adult C. sexmaculata showed a predatory preference for R. maidis. The results indicate that C. sexmaculata is well adapted to P. solenopsis within 2 generations and that the mealybug can be included in the biological control range of C. sexmaculata. |
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