Abstract:
Brontispa longissima pest is important pest at plantation of coconut in subprovince of Indragiri Hilir, Riau province. This research to test the ability of some concentration of local entomophatogenic fungus Beauveria bassiana to control pest of coconut leaf beetle Brontispa longissima. The experiment was conducted at Plant Pest Laboratory at Agriculture Faculty Riau University using completely randomized design with 6 treatment and 4 replication. Each experimental unit consisted of ten B. longissima beetle. Treatment consist of some concentration of local B.bassiana that is 0g/l water, 40g/water, 45g/l water, 50g/water, 55g/l water and 60g/l water. The data obtained were statistically analyzed by analysis of variance and further test with level 5% of Duncan New Multiple Range Test (DNMRT). The result showed that concentration of
B. bassiana 55g/l water is effective to control B. longissima with total mortality is 85% during 276 hours.
