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All Journal AGRIVITA, Journal of Agricultural Science
S. M. Widyastuti
Gadjah Mada University
Agriculture, Biological Sciences & Forestry

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Tree Health Typology of Homegardens and Dry Fields Along an Altitudinal Gradient in Kulon Progo, Indonesia S. M. Widyastuti; Indira Riastiwi; Priyono Suryanto
AGRIVITA, Journal of Agricultural Science Vol 41, No 1 (2019)
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.v41i1.758

Abstract

Homegarden–dry field is one of land management form that maintains biodiversity while at the same time synergize the production and conservation. Changes in market conditions pose a threat for monoculturalism on homegarden and dry field. On the basis of this consideration, it is necessary to do a research on trees health in homegarden and dry field. This study aimed to determine the constituent species in the agroforestry system of Kulon Progo, tree health typology in Kulon Progo, and the type of damages to homegarden and dry field tree species in agroforestry. This research method used inventory of species in the agroforestry system and identification of damage to trees using Forest Health Monitoring (FHM). The result showed that there were three typologies of trees’ health. Those were classified into typology 1, 2 and 3 in Kulon Progo. The types of damage that present at homegarden and dry field in Kulon Progo are the open wound, galls rust, broken branch, leaf spot, excessive branching, gummosis and termite attack.
THE INFECTION PROCESS OF Fusarium subglutinans IN Pinus merkusii SEEDLINGS S. M. Widyastuti; M. Christita; Harjono Harjono; S. Christanti
AGRIVITA, Journal of Agricultural Science Vol 36, No 2 (2014)
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.v36i2.405

Abstract

Pinus merkusii or tusam is an original Indonesian plant and it is naturally distributed in Aceh and North Sumatra. Damping-off disease is the main problem in its nurseries. Fusarium subglutinans is one of the leading causes of damping-off disease. The knowledge of fungal infections process of tusam seedlings is essential to control damping- off disease effectively.The aim of this research is to understand (1) infection process of F. subglutinans in tusam seedlings and the defence response of seedlings against the infection of F. subglutinans. The methods used in this research were (1) identification of fungal pathogens that causing the disease, (2) pathogenicity test of F. subglutinans, (3) detection the accumulation of lignin, accumulation of callose and hypersensitive reactions by staining of seedling tissue using phloroglucinol, aniline blue and lactophenol trypan blue.The results of this study revealed that spores germination occurred in two days after inoculation. Direct penetration through cell wall and stomata was observed on the third day after inoculation. There was hypersensitive reaction in stomata. Accumulation of callose and lignin appeared on the third day after inoculation. However, defence response of seedlings was not effective, as F. subglutinans is a necrotroph fungus.Keywords: damping-off, Fusarium subglutinans, Pinus merkusii, tusam
Co-Authors Harjono Harjono Indira Riastiwi M. Christita Priyono Suryanto S. Christanti