Location: Soil Dynamics ResearchTitle: Investigating the interaction between nutrient stress and cotton leafrool dwarf virus infection and the effects on yield loss and symptoms
|SCHLARBAUM, KELLY - Auburn University|
|CONNER, KASSIE - Auburn University|
|GAMBLE, AUDREY - Auburn University|
|JACOBSON, ALANA - Auburn University|
Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: 11/4/2022
Publication Date: 6/25/2023
Citation: Schlarbaum, K., Conner, K., Gamble, A.V., Balkcom, K.S., Fang, D.D., Jacobson, A.L. 2023. Investigating the interaction between nutrient stress and cotton leafrool dwarf virus infection and the effects on yield loss and symptoms [abstract]. In Proceedings: 2023 Beltwide Cotton Conferences, New Orleans, LA. January 10-12, 2023. pp 526.
Technical Abstract: Cotton leafroll dwarf virus (CLRDV), a single stranded RNA polerovirus, was first observed in United States cotton fields in 2017 along with foliar symptoms and yield loss. Symptoms of CLRDV infection can be variable, and severity of yield loss is not yet fully understood. A two-year field study was conducted to determine if symptom expression and yield losses associated with CLRDV are influenced by nutrient deficiencies. An experiment was conducted in plots that have been maintained under twelve unique nutrient treatments since 1911 in Auburn, AL; Treatments were as follows: winter legume- no nitrogen, no winter legume- no nitrogen, nitrogen added- no winter legume, no phosphorous, no micronutrients, high potassium (4/3 rate), no rock phosphate, no potassium, low potassium (2/3 rate), no sulfur, complete fertilizer with micronutrients, and low potassium (1/3 rate). Data was collected on individual healthy and CLRDV-infected plants in each treatment. Plant infection status was confirmed by testing for CLRDV using RT-PCR. Symptom severity was rated on a biweekly basis 30 days after emergence and included rugosity, leaf bronzing, leaf cupping, tenting or thickening, reddening of leaves, stems or petioles, shortened internodes, and stunted plant height. Yield was collected from each plant. In 2021, there were significant differences in yield between healthy and infected plants in some treatments, and a general trend across all treatments of increased yield in noninfected plants. Symptoms were variable and there were not clear symptoms associated only with CLRDV.