Patogenisitas Beberapa Isolat Cendawan Entomopatogen Metarhizium spp. terhadap Telur Spodoptera litura Fabricius (Lepidoptera: Noctuidae)

TRIZELIA ., MY SYAHRAWATI, AINA MARDIAH

Abstract


Metarhizium spp. is one of the entomopathogenic fungus that can be used to control Spodoptera litura. The purpose of this research was to study the pathogenicity of Metarhizium spp. to S. litura eggs. The isolates were collected from rhizosphere of different crops i.e., cabbage, onion, leek and chili. The results showed that there was an effect of all isolates on egg mortalies. Mortality of S. litura eggs ranges between 19.79%-75.70%, depended on the fungal isolates. First instar larvae commonly died 3 days after eclosion. The maximum mortality of first instar larvae was 58.65%. At a concentration of 108 conidia/ml, the isolate Mt-kb had the highest virulence and causing higher egg mortality as well as first instar larvae.

KEY WORDS: Metarhizium spp., ntomopathogenic fungus, Spodoptera litura, eggs, mortality.


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