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Abstract
Cabbage-heart caterpillar ,Crocidolomia pavonana F. (Lepidoptera: Crambidae), is one of the important pests in Brassicaceae family. Alternative control for cabbage-heart caterpillar that can be used is plant extracts. Neem, cirtonella and jatropha are reported to have an insecticidal effects. This study aimed to determine the effect of combination of neem, citronella, and jatropha oil to against C. pavonana larvae and to obtain the most effective ratio and concentration of oil combinations. The experimental method used in this research was Randomized Block Design with 41 treatments, i.e. control, single neem, citronella, jatropha oil and its combination each tested at 1%; 0,5%; 0,25%; and 0,1% concentration. Each treatment was replicated 3 times. The results of this experiment showed that single oil or combination of neem, citronella and jatropha oil at 1% and 0,5% consentration caused 100% larvae mortality, 1:3:2 ratio at 1% concentration was able to reduce food consumption, 3:2:1 ratio at 0,25% concentration was inhibit larvae development and reduce the weight of pupae, and 3:1:2 ratio at 0,5% concentration can reduce the weight of larvae.
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