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Journal : Proceeding International Conference on Global Resource Conservation

Plant Collections of Bali Botanic Garden Potentially Used As Organic Pesticides Wibawa, I Putu Agus Hendra; Priyadi, Arief
Proceeding International Conference on Global Resource Conservation Vol 4, No 1: Proceeding of 4th ICGRC 2013
Publisher : Proceeding International Conference on Global Resource Conservation

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.209 KB)

Abstract

Along with society awareness of the importance of healthy life, demand of agricultural products which are pesticide residues free has been increasing. Recently, efforts to control plant pests and diseases by farmers have been relied on synthetic pesticides. Utilization of this kinds of pesticides results in various diseases such as cancer, fetal defects, infertility, liver diseases, and so on.  One of the alternatives which can be chosen to minimize those negative effects is using organic pesticides. Its ingredients are organic compounds which easily degraded, do not pollute the environment and relative safe for humans and livestock because its residues are degradable. Indonesia is one of countries with biggest biodiversity in the world, so it has great opportunities to produce organic pesticides. Bali Botanic Garden (BBG) is a government institution which plays role to conserve various kinds of plants from their natural habitats, especially the threatened species. This activity was aimed at knowing how many plant collections in BBG which have potency as organic pesticides and their specific functions whether as fungicides, insecticides, bactericides, rodenticides, nematicides, molluscicides, or fish poisons. The results show that there were 23 plants which have potency as organic pesticides. From that group, 22 kinds act as insecticides, 7 as fungicides, 5 as nematicides, 3 as molluscicides, rodenticides, fish poisons (pissicides), and bactericides respectively.Keywords: organic pesticides, Bali Botanic Garden, plant collections Keywords: organic pesticides, Bali Botanic Garden, plant collections
Association of Spheranthus africanus (Asteraceae) with other Weeds In a Fallowed Rice Field Priyadi, Arief; Wibawa, I Putu Agus Hendra; Lugrayasa, I Nyoman
Proceeding International Conference on Global Resource Conservation Vol 4, No 1: Proceeding of 4th ICGRC 2013
Publisher : Proceeding International Conference on Global Resource Conservation

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.209 KB)

Abstract

Spheranthus africanus is a minor weed of rice, which can be utilized for various purposes. It can be used for phytoremediation of soil contaminated with Pb and also reported to have anti-bacterial activity to be used as natural pesticides. However, because of its minority status little is known about this species in its natural habitat. This study was aimed to understanding the relationship between S. africanus with other weed species in a fallowed paddy field in Tabanan District, Bali, Indonesia. Vegetation analysis by quarter method was done in the rice field, where the species had occurred, in 2011 and 2012. Determination of association type between S. africanus with other weed was conducted by using 2x2 contingency table to calculate χ2, association coefficient (AC) and Ochiai index (OI). The result shows that the Shannon diversity index in this same area for the two consecutive years were 2.06 and 2.48 with species richness of 22 and 27 respectively. Calculation of Summed Dominance Ratio (SDR) showed that the species composition was not evenly distributed, in other words some species dominated others. In terms of association, although S. africanus mainly has no association with most of the weed species in the field, it prominently has positive association with Lindernia ciliata, and Digitaria ciliaris, with no significant negative association. Keywords: diversity, species association, Spheranthus africanus
Taking inventory of Orchid Types in a Region of Tambora Mountain - Sumbawa Island Wibawa, I Putu Agus Hendra; Peneng, I Nyoman; Priyadi, Arief
Proceeding International Conference on Global Resource Conservation Vol 4, No 1: Proceeding of 4th ICGRC 2013
Publisher : Proceeding International Conference on Global Resource Conservation

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.209 KB)

Abstract

Indonesia is well known as one of the countries with high biodiversity in the world, including its orchids. It is expected that there are 6,000 kinds of orchids which grow wildly in forest regions around the world. Along with accelerated forest destructions in Indonesia, due to land conversions or natural disasters, the existence of orchids in their natural habitats is threatened. It is likely that some of these richness could be lost before they can be conserved and known of their functions. Regions of Tambora mountain in Sumbawa island have biodiversity that had not been revealed. Therefore, taking inventory of flora in that region is very crucial to be done as soon as possible. This activity was aimed at saving biodiversity especially rare and endemic orchids there, and also quantitatively knowing richness and frequency of orchids species which are found. From the research, it is known that there were 22 orchids species, from which only one is terrestrial and the rests are epiphytes. In terms of richness, there were some orchids which were common and also rare. Keywords: orchids, Tambora Mountain, conservation, exploration