Kemapanan Pareuchaetes Pseudoinsulata Rego Barros (Lepidoptera: Arctiidae) Pada Gulma Siam Di Yogyakarta = Establishment of Pareuchaetes of Pseudoinsulata Rego Barros (Lepidoptera: Arctiidae) on Siam Weed in Yogyakarta

• Main Author: Perpustakaan UGM, i-lib
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2002
• Subjects: Jurnal i-lib UGM
• Online Access: https://repository.ugm.ac.id/18055/; http://i-lib.ugm.ac.id/jurnal/download.php?dataId=830
• Institution: Universitas Gadjah Mada

Abstract Studies on the establishment of a Siam weed feeder, Pareuchaetes pseudoinsulata (Lepidoptera: Arctiidae) were conducted during January 1998 to April 1999 in Wanagama I, Gunungkidul and Pogung Kidul, Sleman, Yogyakarta. The insect was introduced from Guam to Indonesia by Marihat Research Center, North Sumatera as biological agent against Siam Weed in 1992. The biological agent was reared in laboratory and released on Siam weed fields in Yogyakarta in 1993. The insect stadia used for releasing in the field were fourth instar larvae, fifth instar larvae, mated and unmated adults. Number of insect released in each release site was 200 individuals. The insect population growth, and Siam weeds damaged after release and factors affected the establishment were observed to evaluate the establishment of the biological agent. Results showed that the best stage to release was the mated adult. Eggs and larvae of the insects could be observed until third generation however it did not develop into the following generation. The damage of weed was also observed at very low intensity. The insect dispersion only occurred on the release sites. Establishment of P. pseudoinsulata was inhibited by predators especially ants and spider, while wind and rainfall might inhibit the development of the first instar. Keywords: Pareuchaetes pseudoinsulata, Siam Weed.