GIS APPICATION FOR PLANT DISEASES DISTRIBUTION ON JACK FRUIT, BAEL FRUIT AND MA KIANG TREES IN LOWER NORTHERN PART OF THAILAND

摘要

Geographic Information System (GIS) was introduced to study on the diseases distribution of 338 Jack fruit trees (Artocarpus heterophyllus Lamk.), 126 Bael fruit trees (Aegle marmelos Corr.) and 36 Ma kiang trees (Eugenia paniala Roxb.). The study area covered on 7 provinces in the lower Northern part of Thailand which consisted of 50 districts and 81 sub-district in Kamphaengphet, Nakhonsawan, Phitsanulok, Phichit, Sukhothai, Tak and Uttaradit provinces. Field survey on morphological study found that the average of perimeter on Jack fruit trees, Bael fruit trees and Ma kiang trees were 81.3, 67.4 and 133.5 cm, respectively. The percentage of plant diseases distribution on Jack fruit showed the leaf spot disease caused of Colletotrichum artocarpi and die back disease caused of C. gloesporioides were 85.8% and 60.7%, respectively. In this survey discovered a new disease which destroy stem of Bael fruit in Thailand. Bael fruit stem showed die back symptom, caused of Hysterium sp. which was 28.6% of the total. Ma kiang showed no serious plant diseases, there were lichen on their stem, sooty mold caused of Meliola sp., and agal disease caused of Cephaleuros virescens which were 11.1%, 5.6% and 2.8%, respectively. All database were input to GIS for query and display.