Uji beberapa konsentrasi cendawan Entomopatogen Beauveria bassiana vuillemin isolat lokal Untuk mengendalikan kumbang janur kelapa Brontispa longissima gestro (coleoptera : Chrysomelidae)

Abstract

To control pest use an entomophatogen fungi was developed as biological control agent like : Beauveria bassiana. The experiment was conducted in Plant Pest Laboratory at Agriculture Faculty Riau University from October until December 2011. This study aimed to test the ability of some concentrations of local entomopathogenic fungus Beauveria bassiana to control pests of coconut leaf beetle Brontispa longissima Gestro. The research was conducted using completely randomized design (CRD), with 6 treatments and 4 replications in order to obtain 24 units of the experiment. Each experimental unit consisted of 10 adult B. longissima. Treatment consists of concentrations of B.bassiana 0g/l aquadest, 40 g/l aquadest, 45 g/l aquadest, 50 g/l aquadest, 55 g/l aquadest and 60 g/l aquadest. The data obtained were statistically analyzed by analysis of variance and further test with the level 5% of Duncan’s New Multiple Range Test (DNMRT). Parameters observed the initial time of death imago test (hours), lethal time 50% (hours), the percentage of daily mortality (%), percentage of total mortality (%), temperature and humidity as supporting observations. The results showed treatment with a concentration of B. bassiana 55 g/l of aquadest is effective to control B. longissima units percentase of total mortality is 85% during 276 hours.