CD Skripsi
Uji Konsentrasi Ekstrak Akar Tuba (Derris Elliptica Benth) Dengan Pelarut Organik Terhadap Mortalitas Ulat Krop Kubis (Crocidolomia Pavonana F.) Di Laboratorium
ABSTRACT
Cabbage (Brassica oleracea var. capitata L.) is a horticulture that contains nutrients and plays an important role for human health. The production of cabbage plants in Indonesia fluctuates due to several factors, one of which is the attack of cabbage crop caterpillars (Crocidolomia pavonana F.). Control using synthetic insecticides is the main choice of farmers in controlling C. pavonana, but it turns out that it can cause negative impacts such as pest resistance, recurrence, killing natural enemies, environmental pollution problems and harmful to humans. Another alternative control that can be done is using botanical insecticide from tuba root (Derris elliptica Benth). This study aims to obtain the concentration of tuba root extract with organic solvents that are effective against the mortality of Crocidolomia pavonana F. in the laboratory. The research was conducted experimentally using a completely randomized design (CRD) consisting of five treatments and four replicates. The treatments were 0%, 0.25%, 0.5%, 0.75% and 1% concentration of tuba root extract with organic solvents. The observation parameters consisted of the initial mortality time, lethal time 50, lethal concentration 50 and 95, daily mortality rate, and total mortality. The results indicated that the concentration of 0.75% concentration of tuba root extract is an effective concentration in controlling C. pavonana larvae because it has been able to cause total mortality of 87.50% with the initial mortality time of 3.75 hours and lethal time 50 of 24.25 hours after application. The 0.75% concentration is an effective concentration because it has been able to cause total mortality of more than 80%.
Keywords: Botanical insecticide, Crocidolomia pavonana F., Tuba root
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