Tree Health Analyzing of Malvaceae Collections in Bogor Botanical Gardens

Abstract

Center for Plant Conservation Botanic Gardens (Bogor Botanical Gardens) is an ex-situ conservation center in Indonesia which has ± 13,000 plants specimens collection in shrubs, herbs, lianas and trees. The collection is classified in 218 families, which one is Malvaceae. Most of Malvaceae collections at Bogor Botanical Gardens is tree shaped. Trees have risk of fracture, failure or death which can cause harm. The aim of this research is determining the health condition of Malvaceae collection to predict the occurrence of damage (broken, failure, dead etc.) and as a consideration for collection collections treatment. The method which used are combination of visual observation methods and sound waves using arborsonic. Total samples measured are 7 trees which have criteria such as being in a location with high visitor accessibility, large diameter, old tree and visible disease or pest attack. Each sample was done visually and checked with arborsonic basically using sound wave. The point of measuring on the tree is depend on initial identification of damage using a rubber hammer. In this research can be concluded, there are 2 trees which high risk of damage and become first priority handling because has percentage of damage above 60%, 5 trees have medium risk with second priority (30-60%).