Download This PaperGeospatial Analysis on the Influence of Biophysical Factors on the Gall Rust Prevalence in Falcata (Paraserianthes Falcataria L. Nielsen) Plantation in Gingoog City, Philippines
journal of biodiversity and environmental science, 2017
7 Pages Posted: 27 May 2020
Date Written: 2017
Abstract
This study was conducted to provide additional information on the prevalence of gall rust disease in falcata plantations. A geospatial analysis was employed to determine the influence of biophysical factors to the prevalence of gall rust. The study was conducted in a falcate (Paraserianthes falcataria) plantation in 5 villages within Gingoog City, Philippines. Stratified sampling were followed based on elevation range. Geospatial analysis and mapping was executed using Arc Map ver. 10.1. Result showed that percentage of healthy falcata decreases as the elevation increases and begun to decrease significantly at 400m asl. Severe cases were found at elevation ranging from 400 to 600m asl. Multiple linear regression analysis showed that 22.7% of the variation in infestation rate can be explained by diameter and elevation. Mature trees seemed to have higher tolerance to the disease as no death in mature stand was observed and has not succumbed to the disease. The galls caused death or serious injury to seedlings and saplings, which will potentially lower wood quality and thus will reduce the price of the timber. It was recommended that commercial plantation of P. falcataria will be limited to elevation 300m asl and below. Regular monitoring, removal and burning of infected plant parts until the plantation passed sapling stage was also recommended. The kriging interpolation method has proven to be an effective tool to be able to generate a health map which can serve as guidance for the farmers in selecting areas suitable for P. falcataria with respect to gall rust disease.
Keywords: Gall rust, Uromycladium falcatarium, Tree disease, Plantation, Paraserianthes falcataria
JEL Classification: q23
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