CD Skripsi
Uji Konsentrasi Nematoda Entomopatogen Steinernema Carpocapsae Weiser Lokal Terhadap Hama Penggerek Tongkol Jagung Helicoverpa Armigera Hubner Di Laboratorium
ABSTRACT
Corn (Zea mays L.) is an important food commodity in Indonesia. However,
corn production in Riau Province has declined due to attacks by corn borers
(Helicoverpa armigera Hubner), which can damage up to 39.7% of crops. Control
is generally carried out using synthetic chemical insecticides that have negative
impacts, such as killing natural enemies, resistance, and resurgence. An
environmentally friendly control alternative is to use the local entomopathogenic
nematode (EPN) Steinernema carpocapsae, which can kill the host within 24–48
hours. This study aims to determine the optimal NEP concentration for H. armigera
mortality in the laboratory. The study used a completely randomized design (CRD)
with five concentration treatments (0, 250, 500, 750, and 1000 JI/ml distilled water)
and four replicates. The parameters observed included identification of
entomopathogenic nematodes, initial time of death, 50% lethal time, daily
mortality, and total mortality. The data were analyzed using analysis of variance
and DNMRT 5% follow-up test. The results showed that a concentration of 750
JI/ml was the most effective, causing 80% total mortality within 72 hours and 50%
lethal time was achieved within 48 hours after application.
Keywords: Biological control, infective juvenile, mortality
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