Growth Inhibition of Spodoptera frugiperda using Combination Calotropis gigantea L. and Crescentia cujete L. AS Aprialty, S Sjam, VS Dewi, and YE Agustina
Universitas Hasanuddin
Abstract
Spodoptera frugiperda is an invasive insect and has spread in various countries, including Indonesia, which attacks almost all maize crops. This study purpose to determine the development inhibition of the combination C. gigantea extract and C. cujete extract. The research was implemented at the Pesticides and Natural Materials Laboratory, Faculty of Agriculture, Hasanuddin University. Observations doing at 2 stages, that is testing various concentration of C. gigantea and C. cujete extracts on mortality and development inhibition larva S. frugiperda, and then for concentration 7,5% that caused the high mortality, it was further tested by combining between the extract of C. gigantea and C. cujete. The results showed that C. gigantea extract caused high mortality at a concentration of 7.5% and 10% with LC50 at a concentration 7.36% and LC90 at a concentration 9.08%. C. cujete extract caused high mortality at a concentration of 5% up to 10% with LC50 at a concentration 5.96% and LC90 at a concentration 8.06%. The percentage development inhibition of S. frugiperda larvae each reached 100% using extract C. gigantea concentration 10% and extract C. cujete concentration 10%, while the percentage of inhibition using a combination extract reached 100% at a concentration 7.5%. The high mortality and percentage development inhibition of S. frugiperda larvae was found in the use of C. cujete extract compared with C. gigantea, and if two extracts were combined, it caused the highest mortality and development inhibition compared without the combination.
Keywords: Spodoptera frugiperda, C. gigantea, C. cujete