Prosapia bicincta (Hemiptera: Cercopidae) abundance, plant associations, and impacts on groundcover in Hawai'i Island rangelands.

Autor:	Wilson S; Department of Plant and Environmental Protection Sciences, University of Hawai'i at Mānoa, Honolulu, HI, USA.; Daniel K. Inouye US Pacific Basin Agricultural Research Center, United States Department of Agriculture-Agricultural Research Service, Hilo, HI, USA.; Oak Ridge Institute for Science and Education, United States Department of Energy, Oak Ridge, TN, USA., Thorne MS; Department of Human Nutrition, Food and Animal Sciences, University of Hawai'i at Mānoa, Kamuela Cooperative Extension Office, Kamuela, HI, USA., Johnson MA; Daniel K. Inouye US Pacific Basin Agricultural Research Center, United States Department of Agriculture-Agricultural Research Service, Hilo, HI, USA., Peck DC; Vestaron Corp, Field Development, Kalamazoo, MI, USA., Wright MG; Department of Plant and Environmental Protection Sciences, University of Hawai'i at Mānoa, Honolulu, HI, USA.
Jazyk:	angličtina
Zdroj:	Environmental entomology [Environ Entomol] 2024 Oct 11; Vol. 53 (5), pp. 870-880.
DOI:	10.1093/ee/nvae062
Abstrakt:	The twolined spittlebug, Prosapia bicincta (Say), is a major economic pest of forage grass and turfgrass. Prosapia bicincta was first detected in rangelands on Hawai'i Island in 2016 and has since spread to an estimated 72,000 ha in the North and South Kona districts. This study aimed to quantify P. bicincta abundance, plant associations, and impacts on groundcover over time. Monthly surveys of P. bicincta nymphs and adults were conducted from February 2018 to September 2022 along 17 established 100-m transects at 4 ranches located in Kona, Hawai'i Island, spanning an elevation gradient from 519 to 1,874 m above sea level (a.s.l.). Monitoring revealed P. bicincta occurs from 519 to 1,679 m a.s.l., primarily in Kikuyu grass (Cenchrus clandestinus (Hochst. ex Chiov.)) Morrone (Poales: Poaceae) pastures. Peaks in P. bicincta abundance coincided with the wet season, with most activity occurring from April to October and little to no activity between November and March. Mid elevation (1,000-1,300 m) transects had significantly higher mean P. bicincta abundance (126 nymphs/m2) relative to low (500-999 m) (64 nymphs/m2) and high elevations (>1,300 m) (20 nymphs/m2). Sites with the highest abundance of P. bicincta were also associated with the greatest decrease in mean grass cover (30%) and were replaced by forbs, bare ground, and shrubs. Grasses accounted for 72% of the total P. bicincta detections, with the remaining plants comprised of legumes (16%), sedges (6%), and forbs (6%). Twenty new P. bicincta plant associations were found. This information will help improve the effectiveness of management to suppress populations below economic thresholds. (© The Author(s) 2024. Published by Oxford University Press on behalf of Entomological Society of America.)
Databáze:	MEDLINE
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