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Uji Konsentrasi Entomopatogen Metarhizium Anisopliae Metsch (Sorokin) Isolat Padi Terhadap Mortalitas Rayap (Coptotermes Curvignathus Holmgren) Hama Kelapa Sawit
Coptotermes curvignathus is a major pest that attacks oil palms in peat soils. The origin of the isolate affects the pathogenicity of the entomopathogenic fungus Metarhizium anisopliae. This study aims to obtain the concentration of entomopathogenic fungus Metarhizium anisopliae rice isolate as a bioinsecticide against termites Coptotermes curvignathus, a pest of oil palm. The research was conducted experimentally usingacompletely randomized design (CRD), consisting of 5 treatments with 5 replicates. The treatments given were several concentrations of Metarhizium. anisopliae, namely 0 g.l-1, 25 g.l-1, 50 g.l-1, 75 g.l-1, 100 g.l-1 distilled water. Parameters observed were initial time of death, lethal time 50, lethal concentration 50 and 95, daily mortality, total mortality, behavioral and morphological changes, and temperature and humidity. The results showed that the concentration of Metarhizium anisopliae rice isolate concentration of 100 g.l-1 distilled water with a conidia density of 6.15 x 106 con.ml-1 is a concentration that can be considered as a bioinsecticide because it causes total mortality of Coptotermes curvignathus by 82%, the initial time of death is 7.2 hours and lethal time 50 Coptotermes curvignathus 25 hours. The right concentration of Metarhizium anisopliae isolate sawah to kill 50% of Coptotermes curvignathus is 1.79% concentration. The right concentration for 95% lethality is 12.07%.
Keywords: bioinsecticide, conidia density, peat soils, total mortality
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