Patogenisitas Cendawan Entomopatogen Lecanicillium lecanii (Zimmerman) Viegas terhadap Larva Instar III Spodoptera exigua (Lepidoptera: Noctuidae)

Abstract

This research aimed to describe the effect of the application of fungal L. lecanii concentration on mortality and time of death to the larvae of S. exigua. The method used were carried out an experimentally in the laboratorium and some parameters were analysed statistically using a single-factor completely randomized design with 6 concentration (10⁵ conidia/ml, 10⁶ conidia/ml, 10⁷ conidia/ml, 10⁸ conidia/ml, 10⁹ conidia/ml and 0 conidia/ml) and 4 replications. The results showed that the application of various concentrations of an effect on mortality rates. At the concentration used was 10⁵ conidia/ml, 10⁶ conidia/ml, 10⁷ conidia/ml, 10⁸ conidia/ml and the concentration of 10⁹ conidia/ml with a mortality rate respectively after application of 20%, 45%, 55%, 70 % and 75%. While the application of various concentrations of conidia showed that conidial concentration effect on the time of death. Each conidial concentration of 10⁵–10⁹ conidia/ml caused the death time is 212,4 hours, 187,2 hours, 159,6 hours, 141,6 hours and 126 hours.