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The distribution and composition of Odonata (Dragonfly and Damselfly) in Sriwijaya University, Inderalaya Campus South Sumatera Yulia Pujiastuti; Yuanita Windusari; Muhammad Agus
JURNAL PENELITIAN BIOLOGI BERKALA PENELITIAN HAYATI Vol 23 No 1 (2017): December 2017
Publisher : The East Java Biological Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (923.341 KB) | DOI: 10.23869/bphjbr.23.1.20171

Abstract

The information about distribution and composition of Odonata in Sriwijaya University campus area is still not much. The decrease areas supporting the growth of Odonata influence distribution and composition of these species. The objective of research was to analyze the distribution and composition of Odonata in Sriwijaya University, Inderalaya Campus. This research had been conducted from December 2016 until February 2017 and continued in April 2017 by using visual observation, direct capture, and sticky traps. The sampling locations were determined by five points of observation station by using purposive sampling method. The result revealed Odonata living in Sriwijaya University, Inderalaya Campus is was aggregated and consisted of 22 species belonged to five families. The highest composition of species was found in Libellulidae (77.65%) followed by Coenagrionidae (17.86%).
Epidemiology of banana bunchy top disease in South Sumatra, Indonesia Arsi Arsi; Suparman Suparman; Yulia Pujiastuti; Chandra Irsan
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 2 (2025): SEPTEMBER, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLAN
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.225298-308

Abstract

Banana bunchy top disease has become increasingly important in South Sumatra. The disease, caused by Banana bunchy top virus (BBTV), leads to severe losses as infected plants fail to produce fruit. The virus is transmitted in a persistent manner by banana aphid, Pentalonia nigronervosa. Both nymphs and adults of the aphid can transmit the virus, with adults being more efficient vectors than nymphs. The threat of the disease in the province has been escalating, as indicated by the significant rise in the number of infected banana plants in the recent years. However, no epidemiological study had been conducted prior to this research. This study aimed to identify and evaluate the contributing factors to the epidemic of banana bunchy top disease in South Sumatra. A survey was conducted to assess the banana cropping system and all aspects contributing to the disease’s epidemiology in the province. Thirteen regencies were surveyed using a purposive sampling method, covering 11 regencies and 3 cities selected based on the accessibility of banana plantations by transportation routes. In each site, banana plants within an imaginary 50-meter diameter circle centered on an infected plant were sampled. The result showed that the BBTV epidemic was influenced by several factors: (1) banana genome, with diploid AA and triploid AAA cultivars being more resistant than those containing the B genome; (2) cropping system, with higher disease prevalence in mixed-cropping systems than in monoculture; (3) botanical environment, where the presence of alternative hosts of P. nigronervosa correlated with higher disease incidence; (4) farmer behavior, with lack of concern or action against the disease contributing to its spread; and (5) transportation access, with higher incidence observed in areas closer to roads.