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J Econ Entomol

Title:		Belowground Herbivory to Sweetpotato by Sweetpotato Weevil (Coleoptera: Brentidae) Alters Population Dynamics and Probing Behavior of Aboveground Herbivores
Author(s):		Chen J; Chen X; Stout MJ; Davis JA;
Address:		"WWOPS Benchmarking, Amazon, Austin, TX 77845, USA. Department of Entomology, Texas A&M University, College Station, TX 77843, USA. Department of Entomology, Louisiana State University AgCenter, Baton Rouge, LA 70803, USA"
Journal Title:		J Econ Entomol
Year:		2022
Volume:		115
Issue:		4
Page Number:		1069 - 1075
DOI:		10.1093/jee/toac098
ISSN/ISBN:		1938-291X (Electronic) 0022-0493 (Linking)
Abstract:		"Aboveground and belowground herbivory can alter host quality and trophic interactions. However, little research has explored the impacts of belowground herbivory on plant virus epidemiology. To understand this interaction in sweetpotato, Ipomoea batatas L. (Lam), we studied the impact of herbivory by sweetpotato weevil, Cylas formicarius elegantulus (Summers), to storage roots on vector herbivore, Myzus persicae (Sulzer), the green peach aphid, and Aphis gossypii Glover, the cotton aphid, feeding behavior (M. persicae and A. gossypii) and population dynamics (M. persicae only as A. gossypii does not colonize sweetpotato). In addition, a nonvector herbivore, Chrysodeixis includens (Walker), the soybean looper, weight gain was included for comparison. Infestations of sweetpotato weevil in storage roots reduced C. includens weight gain and M. persicae intrinsic rate of increase (rm), net reproductive rate (Ro), and finite rate of increase (lambda) on aboveground portions of the plant. In probing behaviors related to nonpersistent virus spread (30 min trials), M. persicae probed less often, took longer to reach the first pd (potential drop), had shorter II-3 (intracellular subphase sap ingestion) durations, and had fewer archlets on plants infested with C. formicarius elegantulus. Total phloem duration did not differ between treatments, indicating that the lowered performance of M. persicae on infested plants was not due to discrepancies in probing duration. Results were less clear for A. gossypii. Thus, in sweetpotato, belowground herbivory can alter plant virus vector abundance and behavior. Understanding the mechanisms underlying these changes in behavior could improve plant virus vector integrated pest management"
Keywords:		Animals *Aphids *Coleoptera Herbivory *Ipomoea batatas *Plant Viruses Population Dynamics *Weevils Weight Gain electrical penetration graph induced resistance virus vector efficiency;
Notes:		"MedlineChen, J Chen, X Stout, M J Davis, J A eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. England 2022/06/30 J Econ Entomol. 2022 Aug 10; 115(4):1069-1075. doi: 10.1093/jee/toac098"