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Evaluating Optimal Spray Timing, Planting Date, and Current Thresholds for Lygus lineolaris (Hemiptera: Miridae) in Virginia and North Carolina Cotton.
J Econ Entomol. 2019 05 22; 112(3):1207-1216.JE

Abstract

Economically damaging infestations of Lygus lineolaris (Palisot de Beauvois) (Hemiptera: Miridae), the tarnished plant bug, have been increasing in North Carolina and Virginia cotton since 2009. We conducted experiments to compare prophylactically timed sprays based on cotton phenology and current action thresholds based on sweep net and drop cloth sampling. In the second year of the study, we included planting date as a factor, with early and late-planted cotton. We found L. lineolaris nymph densities were reduced by at least 60% in North Carolina and 74% in Virginia in threshold plots when compared with the untreated control. Protecting the crop from first square through the fourth week of bloom afforded at least 30% control across planting dates in Virginia and at least 40% control in North Carolina. Economic returns were two to three times greater in early-planted cotton than in late-planted cotton. Treating cotton at action threshold or using prophylactic sprays from first square until the sixth week of bloom in early-planted cotton yielded over $500/ha in net returns in both North Carolina and Virginia. This study supports previous research that shows controlling L. lineolaris infestations during squaring and early weeks of flowering is critical for maximizing yield potential. Our findings also suggest that prebloom and bloom thresholds based on adult and nymphal density devised in the Mid-South may need revision in North Carolina and Virginia.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Aghaee MA
North Carolina State University, Vernon James Research and Extension Center, Plymouth, NC.
Dorman SJ
Virginia Tech University, Tidewater Agricultural Research and Extension Center, Suffolk, VA.
Taylor SV
Virginia Tech University, Tidewater Agricultural Research and Extension Center, Suffolk, VA.
Reisig DD
North Carolina State University, Vernon James Research and Extension Center, Plymouth, NC.

MeSH

AnimalsGossypiumHemipteraHeteropteraNorth CarolinaNymphVirginia

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

30615120

Citation

Aghaee, Mohammad-Amir, et al. "Evaluating Optimal Spray Timing, Planting Date, and Current Thresholds for Lygus Lineolaris (Hemiptera: Miridae) in Virginia and North Carolina Cotton." Journal of Economic Entomology, vol. 112, no. 3, 2019, pp. 1207-1216.
Aghaee MA, Dorman SJ, Taylor SV, et al. Evaluating Optimal Spray Timing, Planting Date, and Current Thresholds for Lygus lineolaris (Hemiptera: Miridae) in Virginia and North Carolina Cotton. J Econ Entomol. 2019;112(3):1207-1216.
Aghaee, M. A., Dorman, S. J., Taylor, S. V., & Reisig, D. D. (2019). Evaluating Optimal Spray Timing, Planting Date, and Current Thresholds for Lygus lineolaris (Hemiptera: Miridae) in Virginia and North Carolina Cotton. Journal of Economic Entomology, 112(3), 1207-1216. https://doi.org/10.1093/jee/toy407
Aghaee MA, et al. Evaluating Optimal Spray Timing, Planting Date, and Current Thresholds for Lygus Lineolaris (Hemiptera: Miridae) in Virginia and North Carolina Cotton. J Econ Entomol. 2019 05 22;112(3):1207-1216. PubMed PMID: 30615120.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluating Optimal Spray Timing, Planting Date, and Current Thresholds for Lygus lineolaris (Hemiptera: Miridae) in Virginia and North Carolina Cotton. AU - Aghaee,Mohammad-Amir, AU - Dorman,Seth J, AU - Taylor,Sally V, AU - Reisig,Dominic D, PY - 2018/06/10/received PY - 2019/1/8/pubmed PY - 2019/12/18/medline PY - 2019/1/8/entrez KW - cotton KW - integrated pest management KW - plant bug KW - planting date KW - sampling method SP - 1207 EP - 1216 JF - Journal of economic entomology JO - J Econ Entomol VL - 112 IS - 3 N2 - Economically damaging infestations of Lygus lineolaris (Palisot de Beauvois) (Hemiptera: Miridae), the tarnished plant bug, have been increasing in North Carolina and Virginia cotton since 2009. We conducted experiments to compare prophylactically timed sprays based on cotton phenology and current action thresholds based on sweep net and drop cloth sampling. In the second year of the study, we included planting date as a factor, with early and late-planted cotton. We found L. lineolaris nymph densities were reduced by at least 60% in North Carolina and 74% in Virginia in threshold plots when compared with the untreated control. Protecting the crop from first square through the fourth week of bloom afforded at least 30% control across planting dates in Virginia and at least 40% control in North Carolina. Economic returns were two to three times greater in early-planted cotton than in late-planted cotton. Treating cotton at action threshold or using prophylactic sprays from first square until the sixth week of bloom in early-planted cotton yielded over $500/ha in net returns in both North Carolina and Virginia. This study supports previous research that shows controlling L. lineolaris infestations during squaring and early weeks of flowering is critical for maximizing yield potential. Our findings also suggest that prebloom and bloom thresholds based on adult and nymphal density devised in the Mid-South may need revision in North Carolina and Virginia. SN - 1938-291X UR - https://www.unboundmedicine.com/medline/citation/30615120/Evaluating_Optimal_Spray_Timing_Planting_Date_and_Current_Thresholds_for_Lygus_lineolaris__Hemiptera:_Miridae__in_Virginia_and_North_Carolina_Cotton_ DB - PRIME DP - Unbound Medicine ER -