Target spot, which is caused by the fungus Corynespora cassiicola, is an emerging disease in cotton in the Lower and Mid-South in the U.S. Phylogenetically, C. cassiicola isolates collected from cotton across the Lower South are distinct from those collected from other crops, particularly vegetables. This suggests that C. cassiicola isolates from cotton are either a recent introduction to the U.S. or has arisen from a mutation.
Rainfall patterns along with variety selection and management inputs relating to yield potential influence the target spot risk in cotton. Greatest target spot-attributed defoliation and subsequent yield losses, which may exceed 300 pounds of lint per acre, have been recorded for an intensively managed, susceptible variety having a yield potential above 2.5 to 3 bales per acre.
Dr. Austin Hagan of Auburn University will discuss the results of a two-year study on developing integrated strategies for managing target spot in cotton. Topics that will be addressed in the webinar will include disease distribution, variety susceptibility and potential yield loss, efficacy of registered and candidate fungicides, fungicide application number, timing, methodology, and placement, as well as the influence of cotton cropping frequency, tillage practices, seeding rate, and planting date on disease development and cotton yield.
Date and time: Monday, February 27, 3 PM ET
Presenter: Austin Hagan, Professor, Extension Plant Pathologist, Auburn University
How to join: You can register for the webinar here. Registration is not required until the day of the webinar.
Dr. Austin Hagan is a Professor of Plant Pathology with an extension/research appointment in the Department of Entomology and Plant Pathology at Auburn University. He is also this year’s Friends of Southern IPM – Implementer award.
Dr. Hagan was named as an Auburn University Alumni Professor in 2001. His extension responsibilities include the diagnosis, monitoring, and development of disease and nematode control strategies for peanut, cotton, cereal, grain, and forage crops as well as amenity turf and ornamentals as well as serving as the Agronomy Team Leader.
Research responsibilities on ornamentals, corn, cotton, grain sorghum, and peanut along with cereal, bioenergy feedstock, and forage crops includes the assessment of cropping and management practices, variety selection, and pesticide inputs on the control of diseases and nematode pests as well as on yield, quality components, and economics. On ornamental crops, his research focus includes the etiology, epidemiology, and control of fungus-incited diseases of container and field grown annual, perennial, and woody ornamentals with emphasis on crapemyrtle, dogwood, hydrangea, rose, and switchgrass.
Dr. Hagan has published 65 refereed articles along with 242 abstracts and proceedings, 586 edited technical research reports, 127 AAES bulletins, circulars, and articles, as well as numerous circulars and other extension publications.