Mortality and Antifeedant Effects of some Jamu Waste Extract on Larvae of Spodoptera litura

<p>The amount of herbal waste in Indonesia is quite high, so it needs to be managed to reduce the amount and increase the value of benefits. One way is to utilize it as a botanical insecticide.<em> </em>This study aims to determine the effect and concentration of herbal waste extract that is effective on mortality and inhibition of feeding activity of <em>Spodoptera litura</em> (F.) (Lepidoptera: Noctuidae). Larvae of <em>S. litura</em> are one of the pests in mustard plants. The extraction method used a maceration method with ethanol solvent. Research using four types of herbal waste extracts with a leaf dipping method. The results show that four extracts affect increased mortality and inhibition of the feeding activity of <em>S. litura</em> larvae. The value of LC<sub>50</sub> is at 60 HAA, LT<sub>50</sub>, and the inhibition of eating activity at a concentration of 36% by ginger <em>jamu</em> waste extract is 29%, 27 hours, and 64%. In contrast, curcuma <em>jamu</em> waste extract<strong> </strong>was 25%, 24 hours, and 68%, respectively. For LC<sub>50</sub> at 72 HAA, LT<sub>50</sub> and inhibition of eating activity at a 50% concentration of galangal <em>jamu</em> waste extract was 17%, 14 hours, and 43%. While turmeric <em>jamu</em> waste extract was 17%, 16 hours, and 42% respectively.</p>