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1

Mangosteen thrips: collection, identification and control

100%
Affandi B., Emilda D.
Journal of Fruit and Ornamental Plant Research
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2009
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tom 17
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nr 2
219-233
The mangosteen international standard for export requires fruit free from scar. This was the most constraining issue for the Indonesian export of mangosteen. Thrips are pests which cause scars on mangosteen fruits. Hence, there is an inevitable need to control the thrips population. This research was aimed at identifying the thrips pest that causes scars on the mangosteen fruit. This project was also aimed at studying the effects of using yellow fluorescent sticky trap (YST), and the combination treatment: YST and intensive orchard care (YST+IOC) on the percentage and intensity of fruit scars caused by thrips. The research was conducted at a farm with a polycultured mangosteen orchard in Lima Puluh Kota, West Sumatra, Indonesia. It was conducted during the two fruit seasons from September 2006 to February 2007, and from October 2007 to February 2008. The results showed that there were two species of thrips pests that are associated with the mangosteen: Scirtothrips dorsalis (Hood) and Selenothrips rubrocintus Giard. All of the treatments gave significant differences in decreasing the percentage and intensity of scars. These differences were significantly different compared to the control group in the first year as well as in second year. The combined treatment of YST+IOC proved to have the best results in reducing the percentage (41.19% and 43.96%) and intensity of scars (32.14% and 15.81%) in the first year as well as in the second year, respectively.
2

Preliminary study of the activity of some essential oils against Fusarium oxysporum f. sp. cubense

100%
Istianto M., Emilda D.
Journal of Fruit and Ornamental Plant Research
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2011
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tom 19
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nr 2
Wilt disease, caused by Fusarium oxysporum f. sp. Cubense (Foc), is one of the most important diseases of bananas. An Integrated Pest Management (IPM) strategy is a promising concept for controlling this disease. This concept must be supported with all suitable control techniques that can be compatibly and effectively utilized. Essential oils, which have been long recognized as having good fungus-toxic com­pounds, are a recommend technology which may be used to complete previous con­trol techniques. The aim of this experiment was to evaluate the antifungal activity of essential oils extracted from Cymbopogon nardus, Eugenia aromatica, Pogostemon calbin, and Vitiveria zizanoides against Foc. The experiment was conducted in the January-April time period of 2010, in the laboratory of the Indonesian Tropical Fruit Research Institute, at room temperature. The result showed that the essential oils which had been tested were able to suppress Foc mycelial growth. Essential oil ex­tracted from E. aromatica provided the strongest suppression of Foc mycelial growth, mainly when used at a volume of 9 and 18 pi. This result indicated that essential oil of E. aromatica had good potency and may be developed as a control agent against wilt disease of banana.
3

Effect of organic fertilizers on sesceptibility of potted durian seedlings to Ohytophthora diseases

71%
Muryati, Octriana L., Emilda D., Santoso P. J., Sunarwati D.
Journal of Fruit and Ornamental Plant Research
|
2009
|
tom 17
|
nr 1
67-77
This research was aimed on evaluating the effect of organic fertilizers on susceptibility of durian seedlings to Phytophthora palmivora. The green compost, chicken manure and rice husk, alone or in a mixture, significantly increased seedling survival. Therefore, such growing media composition should be taken into account as one of the elements of integrated Phytophthora control in durian. On the other hand, goat manure has a ruinous effect on the growth and survival of durian seedlings and shall be avoided in durian orchards.
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