Detection, spatial tracking, damage and yield assessment and mapping of Anthracnose-twister of onion using Remote Sensing Technology in San Jose City, Nueva Ecija [manuscript]
Date
2019
Authors
Mary Jane M. De Guzman
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Abstract
Detection, tracking and mapping the geographical distribution of anthracnose-twister disease of onion conducted in San Jose City, Nueva Ecija and carried out in 14 of its barangays from January 2019 to April 2019. Yield was assessed as well the damage and incidence where the progress was determined through a map series.
A total of 77.78 hectares (4.67%) anthracnose-twister incidence over 1,663.12 estimated onion area was surveyed throughout the season. Barangays with high incidence level were detected in Caanawan and Kaliwanagan. High damage level was only detected in barangay Kaliwanagan affecting a total of 0.81 hectares equivalent to 0.49% of the onion area.
Normalized Difference Vegetation Index (NDVI) images in Barangay Bagong Sikat and Barangay San Juan acquired using Unmanned Aerial Vehicle (UAV) to detect anthracnose-twister incidence which surveys validated through ground truthing. An estimated 24,058.29 MT of onion was produced in 29 onion-growing Barangays in San Jose City.