Factors that govern the spatial distribution of the root rot disease at Sabah tea

Siti Farihah Juaini, (2005) Factors that govern the spatial distribution of the root rot disease at Sabah tea. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Root rot disease of tea trees in Sabah Tea Plantation is caused by Poria hypolateritia (fungus). The study site is located 20km from Ranau. A total of 7 hectares were selected as study site. These consisted of Nalapak Field 2 as first site is 4 hectares and second field is Nalapak Organic 2, 3 hectares. Both of the fields are in sloping area. The main objective of this research is to investigate this spatial distribution of the Poria disease found at Sabah Tea. Thus, in order to reach this objective, three sub objectives are carried out winch are; 1) to asses the spatial variability of root rot disease in Sabah tea by means of variograph, 2) to create a digital elevation model (DEM) for the fields under investigation, 3) to assess the role of topography for the distribution of root disease in tea. In Nalapak Field 2, 74 data of dead and 21 data for removed trees were taken. When in Nalapak Organic 2, 221 data of disease trees were taken. The samples then were analyzed by using the kriging and DEM. Besides that, hotspot analysis was used to show the density estimation of disease trees in Sabah Tea Plantation. The distribution of the disease is spatial for both fields.

Item Type: Academic Exercise
Uncontrolled Keywords: Sabah Tea Plantation, Poria hypolateritia, Nalapak, sloping area, disease tree
Subjects: Q Science > QK Botany
Divisions: SCHOOL > School of Science and Technology
Depositing User: MDM SITI AZIZAH IDRIS
Date Deposited: 09 Dec 2013 02:09
Last Modified: 11 Oct 2017 07:01
URI: http://eprints.ums.edu.my/id/eprint/7709

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