| Abstrak/Abstract |
A study on the effects of the availability of keben (Barringtonia asiatica Kurtz) to the development of the late instar of Attacus alas (L) larvae reared outdoor without screen had been conducted by rearing the fifth instar of A. atlas larvae with different amount of keben leaves per larvae. The results showed that the amount of plant fodder affects the larval spinning success. The treatment also affects the length of keben’s regeneration time. The minimum number of leaves to gain a good yield and a fast regeneration of its host plants was 25 keben leaves per larvae. Using this number, the percentage of cocooning larvae, cocoon’s weight,, and shell’s weight, were 68.22 (+14.02)%, 8.47(+1.72)g, and 1.45(+0.33)g. The imago’s weight and percentage of survivorships were 7.03 (+ 1.77) g and 77.41 (+ 12.01)%. The larval period was 16.29 (+ 2.02) days independent of food availability. The length of the plants regeneration time on the treatment with 25 keben leaves per larvae was 28.25 (+5.13) days. Outdoor rearing of atakas without screen was affected by the presence of predators such as Vespidae, Evanidae, Formicidae ((Solenopsis geminata Fabricus and Monomorium floricola), Asilidae, chicken, parasites such as Braconidae. (Exorista sp. and Xanthopimpla sp.) and pathogens such as Bacillus cereus, Beavaria bassiana, and Aspergillus flavus). Some catepillars and bugs were attacking the plant fodder and thus competing with Attacus rearing. |
