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United States Department of Agriculture

Agricultural Research Service

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Research Project: Aerial Imaging of Seasonal Cotton Root Rot Progression in Flutriafol-Treated and Nontreated Cotton Fields in South and Central Texas

Location: Aerial Application Technology Research Unit

Project Number: 6202-22000-032-03
Project Type: Reimbursable

Start Date: Jan 01, 2013
End Date: Dec 31, 2013

Objective:
1) Monitor the seasonal progression of cotton root rot within flutriafol-treated and untreated cotton fields in the Lower Coastal Bend (Corpus Christi) and Southern Rolling Plains (San Angelo) regions of Texas using aerial imagery; 2) Develop image mosaics and regional maps to document the distribution of cotton root rot incidence and severity in the two regions; and 3) Assess the efficacy of flutriafol treatments for the control of cotton root rot on a whole-field basis and in small plots using new and historical images in both regions.

Approach:
1) Airborne multispectral imagery will be collected using a two-camera imaging system from fungicide-treated and untreated fields on a biweekly basis from early June to early August in the Corpus Christi area and from late July to late September in the San Angelo area. Images will be taken at 3050 m (10000 ft) above ground level in four flight lines with a 30-40% forward overlap. The images will be georeferenced and then classified into root rot-infected and non-infected zones using unsupervised and supervised classification techniques; 2) The georeferenced images will be mosaicked to document the extent and severity of root rot damage within fungicide-treated and untreated fields in both study areas; and 3) Fields previously imaged will be used to evaluate the efficacy of the treatments by comparing the change in infection between the current year and previous years. The small-plot experiments will be used to evaluate the differences in cotton root rot control among different treatments. Multiple study sites in the Corpus Christi and San Angelo areas will be established and different combinations of application rates and methods will be used.

Last Modified: 4/17/2014
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