Dorman, Seth J.Taylor, Sally V.Malone, SeanRoberts, Phillip M.Greene, Jeremy K.Reisig, Dominic D.Smith, Ronald H.Jacobson, Alana L.Reay-Jones, Francis P. F.Paula-Moraes, SilvanaHuseth, Anders S.2022-01-212022-01-212022-01-13Dorman, S.J.; Taylor, S.V.; Malone, S.; Roberts, P.M.; Greene, J.K.; Reisig, D.D.; Smith, R.H.; Jacobson, A.L.; Reay-Jones, F.P.F.; Paula-Moraes, S.; Huseth, A.S. Sampling Optimization and Crop Interface Effects on Lygus lineolaris Populations in Southeastern USA Cotton. Insects 2022, 13, 88.http://hdl.handle.net/10919/107838Tarnished plant bug, <i>Lygus lineolaris</i> (Hemiptera: Miridae), is an economically damaging pest in cotton production systems across the southern United States. We systematically scouted 120 commercial cotton fields across five southeastern states during susceptible growth stages in 2019 and 2020 to investigate sampling optimization and the effect of interface crop and landscape composition on <i>L. lineolaris</i> abundance. Variance component analysis determined field and within-field spatial scales, compared with agricultural district and state, accounted for more variation in <i>L. lineolaris</i> density using sweep net and drop cloth sampling. This result highlights the importance of field-level scouting efforts. Using within-field samples, a fixed-precision sampling plan determined 8 and 23 sampling units were needed to determine <i>L. lineolaris</i> population estimates with 0.25 precision for sweep net (100 sweeps per unit) and drop cloth (1.5 row-m per unit) sampling, respectively. A spatial Bayesian hierarchical model was developed to determine local landscape (&lt;0.5 km from field edges) effects on <i>L. lineolaris</i> in cotton. The proportion of agricultural area and double-crop wheat and soybeans were positively associated with <i>L. lineolaris</i> density, and fields with more contiguous cotton areas negatively predicted <i>L. lineolaris</i> populations. These results will improve <i>L. lineolaris</i> monitoring programs and treatment management decisions in southeastern USA cotton.application/pdfenCreative Commons Attribution 4.0 InternationalGossypium hirsutumrisk factorssampling planscoutingtarnished plant bugArticle - Refereed2022-01-20https://doi.org/10.3390/insects13010088