气候变化领域集成服务门户(CCPortal): Functional response of larval and adult Coccinella septempunctata to eggs and larvae of Plutella xylostella on canola

CCPortal

DOI	10.1111/eea.13405
	Functional response of larval and adult Coccinella septempunctata to eggs and larvae of Plutella xylostella on canola
	Kulkarni, S. S.; Evenden, M. L.
发表日期	2024
ISSN	0013-8703
EISSN	1570-7458
起始页码	172
结束页码	4
卷号	172 期号:4
英文摘要	Understanding of functional responses (i.e., changes in predator feeding rates with prey density) of key predators to different crop pest stages is critical to strengthening biological control, particularly in view of climate change and temperature variation. We investigated prey preferences of Coccinella septempunctata L. (Coleoptera: Coccinelidae) to egg and larval stages of a key brassicaceous pest of canola (Brassica napus L., Brassicaceae), the diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidae). First, laboratory choice and no-choice bioassays tested the hypotheses that C. septempunctata accepts and differentially prefers two prey developmental stages (eggs and larvae). Then, C. septempunctata larvae and adults were exposed to six densities of P. xylostella eggs over 24 h in functional response bioassays that determined the number of eggs consumed. Finally, the functional response bioassays were repeated with larval prey and extended with three temperature regimes: 10, 22 and 32 degrees C. In both choice and no-choice assays, C. septempunctata adults and larvae consumed more P. xylostella larvae than eggs. The functional response of C. septempunctata depended on predator developmental stage and temperature, with reduced handling time and increased attack rates and consumption under warmer conditions. At 10 and 22 degrees C, the functional responses of both C. septempunctata larvae and adults were of Type II, i.e., rates of prey consumption increase at decelerating rates and then plateau with increasing prey density. Our study demonstrates that both larvae and adults of C. septempunctata can consume high numbers of eggs and early instar P. xylostella larvae; these responses are temperature-dependent with increased consumption rates at higher temperatures. This may lead to improvements in management of P. xylostella in canola.
英文关键词	biological control; Brassicaceae; climate change; Coccinellidae; Coleoptera; diamondback moth; integrated pest management; Lepidoptera; Plutellidae; predator-prey interactions; prey preference; temperature variation
语种	英语
WOS研究方向	Entomology
WOS类目	Entomology
WOS记录号	WOS:001156537000001
来源期刊	ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290248
作者单位	University of Alberta
推荐引用方式 GB/T 7714	Kulkarni, S. S.,Evenden, M. L.. Functional response of larval and adult Coccinella septempunctata to eggs and larvae of Plutella xylostella on canola[J],2024,172(4).
APA	Kulkarni, S. S.,&Evenden, M. L..(2024).Functional response of larval and adult Coccinella septempunctata to eggs and larvae of Plutella xylostella on canola.ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA,172(4).
MLA	Kulkarni, S. S.,et al."Functional response of larval and adult Coccinella septempunctata to eggs and larvae of Plutella xylostella on canola".ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA 172.4(2024).