Hendra, WawanSalbiah, DesitaSutikno, Agus2013-07-172013-07-172013-07-17Arnalishttp://repository.unri.ac.id:80/handle/123456789/4431Wawan Hendra.Jur.2013Red pepper (Capsicum annuum L.) is an important commodities which have high economic value in Indonesia. Aphis glossypii is a major pest of pepper plants which cause the production loss between 6%-25% and reached more than 90% as a virus vector. Using marygold leaf extract as an insecticide expected to reduce the risk of crop losses by A. gossypii. This study aims to find and obtained the better concentration of Tithonia diversifolia leaf extract to controling A. gossypii on red pepper plants. The Research conducted experimentally using a completely randomized design (CRD) with 6 treatments (T. diversifolia leaf extract concentration) and 4 replications. The data were statistically analyzed using variance analysis and tested further with LSD (Least Significant Difference) at the 5% level. The results showed that concentration 4 g/l water ofT. diversifolia leaf extract is effective to controlling A. gossypii with a mortality about 91.67%, the initial death time 2.25 hours and LT50 about 20.25 hours.otherTithonia diversifoliaAphis gossypiiCapsicum annumstudent Paper Post Degree