Intraguild Predation of <em>Hippodamia variegata</em> on Aphid Mummies in Cotton Field
Intraguild predation among arthropod predators in agricultural ecosystems may have a negative impact on biological control. At present, there are few direct reports on trophic relationships among participants of predation in field groups. In this study, we measured the feeding choices of <i>Hi...
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MDPI AG
2023-01-01
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| Series: | Insects |
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| author | Shuying Dou Bing Liu Yangtian Liu Jianping Zhang Yanhui Lu |
| author_facet | Shuying Dou Bing Liu Yangtian Liu Jianping Zhang Yanhui Lu |
| author_sort | Shuying Dou |
| collection | DOAJ |
| description | Intraguild predation among arthropod predators in agricultural ecosystems may have a negative impact on biological control. At present, there are few direct reports on trophic relationships among participants of predation in field groups. In this study, we measured the feeding choices of <i>Hippodamia variegata</i> (Goeze) towards mummies with different densities of <i>Aphis gossypii</i> Glover. The dynamics of the occurrence of mummies in the cotton field were investigated over 2017–2019. Singleplex PCR and multiplex PCR were used to detect the predation of 2090 <i>H. variegata</i> individuals on aphids and mummies in Xinjiang cotton field, which revealed the intraguild predation frequency between <i>H. variegata</i> and various parasitoids. There was no obvious feeding preference of <i>H. variegata</i> towards live aphids or mummies, which mainly depended on the relative density of prey. Among the four species of aphids detected in <i>H. variegata</i>, <i>A. gossypii</i> had a high detection rate and was the main prey source of the ladybeetle in the cotton filed. Mostly, ladybeetles consumed parasitoids through mummies, with 6.39% directly feeding on adult parasitoids. <i>H. variegata</i> had strong trophic links to both parasitoids and aphids. We established a food web of aphids–primary parasitoids–hyperparasitoids–<i>H. variegata</i>, which can be used to evaluate the pest control ability of <i>H. variegata</i> from a new perspective. |
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| spelling | doaj.art-03c6b7bc2a0749ac9813fdfaf4c533a92023-11-30T22:48:44ZengMDPI AGInsects2075-44502023-01-011418110.3390/insects14010081Intraguild Predation of <em>Hippodamia variegata</em> on Aphid Mummies in Cotton FieldShuying Dou0Bing Liu1Yangtian Liu2Jianping Zhang3Yanhui Lu4Xinjiang Production and Construction Corps Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization/Key Laboratory at Universities of Xinjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Shihezi University, Shihezi 832003, ChinaState Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, ChinaState Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, ChinaXinjiang Production and Construction Corps Key Laboratory of Special Fruits and Vegetables Cultivation Physiology and Germplasm Resources Utilization/Key Laboratory at Universities of Xinjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of Agriculture, Shihezi University, Shihezi 832003, ChinaState Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, ChinaIntraguild predation among arthropod predators in agricultural ecosystems may have a negative impact on biological control. At present, there are few direct reports on trophic relationships among participants of predation in field groups. In this study, we measured the feeding choices of <i>Hippodamia variegata</i> (Goeze) towards mummies with different densities of <i>Aphis gossypii</i> Glover. The dynamics of the occurrence of mummies in the cotton field were investigated over 2017–2019. Singleplex PCR and multiplex PCR were used to detect the predation of 2090 <i>H. variegata</i> individuals on aphids and mummies in Xinjiang cotton field, which revealed the intraguild predation frequency between <i>H. variegata</i> and various parasitoids. There was no obvious feeding preference of <i>H. variegata</i> towards live aphids or mummies, which mainly depended on the relative density of prey. Among the four species of aphids detected in <i>H. variegata</i>, <i>A. gossypii</i> had a high detection rate and was the main prey source of the ladybeetle in the cotton filed. Mostly, ladybeetles consumed parasitoids through mummies, with 6.39% directly feeding on adult parasitoids. <i>H. variegata</i> had strong trophic links to both parasitoids and aphids. We established a food web of aphids–primary parasitoids–hyperparasitoids–<i>H. variegata</i>, which can be used to evaluate the pest control ability of <i>H. variegata</i> from a new perspective.https://www.mdpi.com/2075-4450/14/1/81predatory ladybeetleparasitoidmolecular detectionfood webintraguild predation |
| spellingShingle | Shuying Dou Bing Liu Yangtian Liu Jianping Zhang Yanhui Lu Intraguild Predation of <em>Hippodamia variegata</em> on Aphid Mummies in Cotton Field Insects predatory ladybeetle parasitoid molecular detection food web intraguild predation |
| title | Intraguild Predation of <em>Hippodamia variegata</em> on Aphid Mummies in Cotton Field |
| title_full | Intraguild Predation of <em>Hippodamia variegata</em> on Aphid Mummies in Cotton Field |
| title_fullStr | Intraguild Predation of <em>Hippodamia variegata</em> on Aphid Mummies in Cotton Field |
| title_full_unstemmed | Intraguild Predation of <em>Hippodamia variegata</em> on Aphid Mummies in Cotton Field |
| title_short | Intraguild Predation of <em>Hippodamia variegata</em> on Aphid Mummies in Cotton Field |
| title_sort | intraguild predation of em hippodamia variegata em on aphid mummies in cotton field |
| topic | predatory ladybeetle parasitoid molecular detection food web intraguild predation |
| url | https://www.mdpi.com/2075-4450/14/1/81 |
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