Monitoring infestations of oak forests by Tortrix viridana (Lepidoptera: Tortricidae) using remote sensing

Monitoring infestations of oak forests by Tortrix viridana (Lepidoptera: Tortricidae) using remote sensing

We tested the suitability of Landsat images to track defoliation by insect herbivory with focus on the oak leaf roller, Tortrix viridana (Lep.: Tortricidae). Landsat images from the period before (2002) and after the T. viridana infestation (2007, 2014) were compared in oak forests of Zagros in west...

Full description

Saved in:
Bibliographic Details
Published in:Plant protection science Vol. 52; no. 4; pp. 270 - 276
Main Authors: Gooshbor, Leila, Bavaghar, Mahtab Pir, Amanollahi, Jamil, Ghobari, Hamed
Format: Journal Article
Language:English
Published: Prague Czech Academy of Agricultural Sciences (CAAS) 01-01-2016
Czech Academy of Agricultural Sciences
Subjects:
Calibration
Correlation coefficient
Correlation coefficients
Defoliation
Herbivory
Infrared spectra
Insects
Landsat
landsat satellite
Landsat satellites
marivan city
Near infrared radiation
Normalized difference vegetative index
Oak
oak leaf roller
quercus brantii
quercus infectoria
Remote sensing
Satellite imagery
Spectral bands
Tortricidae
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We tested the suitability of Landsat images to track defoliation by insect herbivory with focus on the oak leaf roller, Tortrix viridana (Lep.: Tortricidae). Landsat images from the period before (2002) and after the T. viridana infestation (2007, 2014) were compared in oak forests of Zagros in western Iran. The Normalised Difference Vegetation Index (NDVI) was calculated for the test area from Landsat 5, 7, and 8 images. Because the red and near-infrared spectral bands of Landsat 8 OLI sensors are different from the other two, a model for the calibration of Landsat OLI NDVI was developed. The proposed model with a correlation coefficient of 0.928 and root mean square error of 0.05 turned out to be applicable and the NDVI decreased significantly during the observation period. Taking into account the protection status of the area and small fluctuations in temperature, the decrease in NDVI could be attributed to T. viridana damage.
ISSN:1212-2580
1805-9341
DOI:10.17221/185/2015-PPS