Abstract:

A study on Euzophera batangensis Caradja was conducted in Fujiau province from 1989-1993. Euzophera batangensis Caradja is one of the primary pests damaging stem of Casuarina shelterbelt along the sea shore. The growth and resistance performance of 51 different geographical provenances of Casuarina spp. intraduced in 1987 and 1989 were investigated. The varianceanalysis showed that the ability of C₃₈, C₃₉, C₄₄, to resist the pest was quite significant and they were the most resistant provenances. More than ten species of natural enemies of the borer were collected. If the crown density is over 0.3 or the age of stand is over 2 years, the tree could de hardly damaged. The comparison of infectivety of 8 steinernematid Steinernema feltiae Agriotos was the best one. Putting the nematode to water inthe ratio of 200 nematode juveniles to one ml of water and spraying the lipuid to the damaged sites of the tress in forest, a mortality of 72.0% could be obtained. The best way to use Beauveria bassiana to control the pest was to spray the mixture of Beauveria, diesel oil and water, the motality was from 86.1% to 100%.

Key words: Casuarina spp., Euzophera batangensis Caradja, Tree resistance, Nematode, Beauveria bassiana