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ARS Home » Southeast Area » Auburn, Alabama » Soil Dynamics Research » Research » Publications at this Location » Publication #390071

Research Project: Conservation Systems to Improve Production Efficiency, Reduce Risk, and Promote Sustainability

Location: Soil Dynamics Research

Title: Effects of cotton stalk management and cover crop use on CLRDV indicence

item FRAZIER, SAMUEL - Auburn University
item BROWN, STEVE - Auburn University
item Balkcom, Kipling
item JACOBSON, ALANA - Auburn University

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/10/2021
Publication Date: 11/15/2021
Citation: Frazier, S., Brown, S., Balkcom, K.S., Jacobson, A. 2021. Effects of cotton stalk management and cover crop use on CLRDV indicence [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts. 11/10/2021, Salt Lake City, UT.

Interpretive Summary:

Technical Abstract: Cotton leafroll dwarf virus (CLRDV) was first reported in cotton (Gossypium hirsutum) in the U.S. in Alabama in 2017. Since then, there has been considerable research involving the disciplines of entomology, virology, pathology, and plant breeding. However, there have been few investigations exploring the effects of agronomic management on CLRDV. This study recorded CLRDV presence in cotton following various cotton stalk destruction methods with and without a cover crop. Stalk destruction methods were major tillage, mowing, and mowing-pulling. A mixture of cereal rye (Secale cereale) and crimson clover (Trifolium incarnatum) was used for the cover crop treatment. Two cotton varieties were included, DP 2055 B3XF and PHY 400 W3FE. Trial locations were in the Alabama Agricultural Experiment Station System at the E. V. Smith Research Center, Shorter, AL; Wiregrass Research and Extension Center, Headland, AL; and Gulf Coast Research and Extension Center, Fairhope, AL. Data collection included cover crop biomass, cotton stand counts, various cotton growth measurements, pre-bloom aphid presence, late season CLRDV infection, and cotton lint yield. CLRDV detection involved polymerase chain reaction (PCR) analysis from leaf and petiole tissue. The logic supporting this investigation is that elimination of cool season vegetation, particularly cotton stalks and regrowth and possibly weed hosts, may reduce impact of CLRDV. It is intended that this study provides insight on the occurrence of CLRDV when cotton is subjected to different agronomic management strategies.