Yingying Song, Kangwen Sun, Sen Guo, Zhaoke Dong, Ritao Qu, Hongying Cui, Wenxiu Guo, Baohua Ye, Lili Li, Yuyong Liang, Xingyuan Men
{"title":"Interspecific predation of a native herbivore facilitates colonization by fall armyworms, Spodoptera frugiperda","authors":"Yingying Song, Kangwen Sun, Sen Guo, Zhaoke Dong, Ritao Qu, Hongying Cui, Wenxiu Guo, Baohua Ye, Lili Li, Yuyong Liang, Xingyuan Men","doi":"10.1007/s10340-024-01824-8","DOIUrl":null,"url":null,"abstract":"<p><i>Spodoptera frugiperda</i> is a newly invasive pest in China, often sharing the same feeding niche with native <i>S. exigua</i>. To clarify the competitive displacement, colonization and potential threat to crops by <i>S. frugiperda</i>, the cannibalism and predation behavior, feeding preferences, development and reproduction of both species under laboratory conditions, as well as the population dynamics and damage to maize plants in the field, were studied. Results found that food scarcity intensified interspecific predation between <i>S. frugiperda</i> and <i>S. exigua</i>, but the survival rate of 4th instar <i>S. frugiperda</i> was not significantly influenced (> 93%; <i>P</i> > 0.05). Although <i>S. frugiperda</i> exhibited less aggressive behaviors, its cannibalism coefficient and attack intensity were significantly higher than those of <i>S. exigua</i> (<i>P</i> < 0.05). Moreover, <i>S. frugiperda</i> showed a higher feeding preference for mechanically lethal insects when the maize leaf supply was insufficient. Additionally, a combined diet of maize leaves and lethal insects significantly increased their pupal weight and fecundity (<i>P</i> < 0.05)<i>.</i> Field trials showed that when <i>S. frugiperda</i> and <i>S. exigua</i> co-occurred, the population of <i>S. frugiperda</i> at mature stage was similar to that after the intraspecific treatment, and seriously damaged maize plants. These results suggested that interspecific predation by <i>S. frugiperda</i> on <i>S. exigua</i> not only conferred an obvious advantage, but may also promote its development and reproduction, and facilitated its colonization in the invaded area. Our results provide an understanding of the rapid colonization mechanisms of <i>S. frugiperda</i> and will assist development of integrated management strategies.</p>","PeriodicalId":16736,"journal":{"name":"Journal of Pest Science","volume":"85 1","pages":""},"PeriodicalIF":4.3000,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Pest Science","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1007/s10340-024-01824-8","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENTOMOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Spodoptera frugiperda is a newly invasive pest in China, often sharing the same feeding niche with native S. exigua. To clarify the competitive displacement, colonization and potential threat to crops by S. frugiperda, the cannibalism and predation behavior, feeding preferences, development and reproduction of both species under laboratory conditions, as well as the population dynamics and damage to maize plants in the field, were studied. Results found that food scarcity intensified interspecific predation between S. frugiperda and S. exigua, but the survival rate of 4th instar S. frugiperda was not significantly influenced (> 93%; P > 0.05). Although S. frugiperda exhibited less aggressive behaviors, its cannibalism coefficient and attack intensity were significantly higher than those of S. exigua (P < 0.05). Moreover, S. frugiperda showed a higher feeding preference for mechanically lethal insects when the maize leaf supply was insufficient. Additionally, a combined diet of maize leaves and lethal insects significantly increased their pupal weight and fecundity (P < 0.05). Field trials showed that when S. frugiperda and S. exigua co-occurred, the population of S. frugiperda at mature stage was similar to that after the intraspecific treatment, and seriously damaged maize plants. These results suggested that interspecific predation by S. frugiperda on S. exigua not only conferred an obvious advantage, but may also promote its development and reproduction, and facilitated its colonization in the invaded area. Our results provide an understanding of the rapid colonization mechanisms of S. frugiperda and will assist development of integrated management strategies.
期刊介绍:
Journal of Pest Science publishes high-quality papers on all aspects of pest science in agriculture, horticulture (including viticulture), forestry, urban pests, and stored products research, including health and safety issues.
Journal of Pest Science reports on advances in control of pests and animal vectors of diseases, the biology, ethology and ecology of pests and their antagonists, and the use of other beneficial organisms in pest control. The journal covers all noxious or damaging groups of animals, including arthropods, nematodes, molluscs, and vertebrates.
Journal of Pest Science devotes special attention to emerging and innovative pest control strategies, including the side effects of such approaches on non-target organisms, for example natural enemies and pollinators, and the implementation of these strategies in integrated pest management.
Journal of Pest Science also publishes papers on the management of agro- and forest ecosystems where this is relevant to pest control. Papers on important methodological developments relevant for pest control will be considered as well.