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All Journal AGRIVITA, Journal of Agricultural Science
Kurniawan Budiarto
Indonesian Ornamental Crops Research Institute (IOCRI), West Java, Indonesia
Agriculture, Biological Sciences & Forestry

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Physico-Chemical, Viability Evaluations and Efficacy Assessment of Bacillus subtilis Against Soft Rot Disease in Phalaenopsis Wakiah Nuryani; Hanudin Hanudin; Evi Silvia Yusuf; Kurniawan Budiarto
AGRIVITA, Journal of Agricultural Science Vol 40, No 3 (2018): OCTOBER
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v40i0.1720

Abstract

The study of biological agents in controlling plant disease has discovered many potential microbes with various mode of actions. In the end, these potential microorganism should qualifiedly fulfill several requirements before they are formally stated for commercialization and wider implementation. Evaluations on their physico-chemical characteristics and viabililty after certain storage period were needed to ensure the effectiveness of the product during transportation and commercialization process. The research was aimed to evaluate B. subtilis strains B7 and B30 for their physio-chemical characteristic and viability after six months storage and investigate the efficacy of the strains against soft root disease of Phalaenopsis. The results showed that both antagonists had stable perfomances in physico-chemical, viability and efficacy evaluations after six months storage. The existence of active bacteria was demonstrated from the decrease in pH, murky suspensions and foul smelling as indications of fermentative reactions under optimal and minimal nutrients. Both antagonists showed stable viability after storage and effectively inhibited soft rot disease when applied on the infected plants with slightly lesser supression from streptomycin sulphate.
The Evaluation of Chrysanthemum Clones Under Low Elevation Lia Sanjaya; Budi Marwoto; Kurniawan Budiarto; Eka Fibrianty
AGRIVITA, Journal of Agricultural Science Vol 40, No 2 (2018): JUNE
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v40i0.1753

Abstract

Cultivation of chrysanthemum at low elevation was one effort to expand potential production areas. Under these circumstances, several environmental conditions might not be as conducive as in highland and deviate the plant from the original characters and potential yield. Fifteen promising variants derived from an unconventional breeding program were evaluated at two different elevations; 1200 and 250 m above sea level (asl) at Cianjur-West Java, Indonesia during hot season from April to September 2016. The experiment was designed as progenital selection to seek the adaptive genotypes on the targeted sites. The results showed that varietal differences existed among the tested clones when grown under highland and lowland. At lowland (250 m asl), all clones showed growth retardation expressed by the reduction of flower qualities with different degrees among genotypes. In standard group, only 2015-9 and 2015-15 that produced unchanged flower color, with acceptable plant height standard for cut flower. While in spray type, all tested clones produced flower with degraded floret color.
Co-Authors Budi Marwoto Eka Fibrianty Evi Silvia Yusuf Hanudin Hanudin Lia Sanjaya Wakiah Nuryani