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All Journal Buletin Palma
MELDY L.A. HOSANG
Balai Penelitian Tanaman Kelapa dan Palma Lain, Manado
Agriculture, Biological Sciences & Forestry

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Ketahanan Lapang Empat Aksesi Kelapa Genjah Kopyor Terhadap Hama Oryctes rhinoceros di Kabupaten Pati, Jawa Tengah MELDY L.A. HOSANG
Buletin Palma No 38 (2010): Juni, 2010
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bp.v11n38.2010.33-42

Abstract

Field Resistance of four kopyor dwarf coconut Accessions to Oryctes rhinoceros in Pati District, Central JavaThe objective of this research was to determine the level of field resistance of four kopyor dwarf coconut accessions to . The research was conducted on farmers' land having kopyor dwarf coconut palms in Pati, Central Java in April 2010. Three districts were observed and 60 kopyor dwarf coconut accession from each sub district were randomly selected and observed. Observations were recorded by counting the total number of frond cuts on five fully opened young fronds. Results showed that the highest number of frond cuts of dwarf coconut accessions were found on green accession (GKH), followed by brown (GKC), Yelow (GKK) and the least number was found on Orange accession (GKG) with average number of cuts/frond was 0,57, 0,42, 0,22 and 0,13 respectively. The estimation of the reduction of coconut production showed that the highest reduction around 20% was found on GKH and the lowest one on GKG which is less than 10%.
Serangan Hama Bunga Kelapa Tirathaba rufivena Walker (Lepidoptera : Pyralidae) pada Tanaman Kelapa Genjah Salak di Kebun Percobaan Kima Atas MELDY L.A. HOSANG
Buletin Palma No 39 (2010): Desember, 2010
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bp.v0n39.2010.172-180

Abstract

Incidence of the greater coconut spike moth Tirathaba rufivena Walker (Lepidoptera, Pyralidae) on Salak Dwarf Coconut at Kima Atas Experimental GardenThe objectives of this research is to study the incidence of  (Walker) pest inSalak Dwarf coconut (GSK) at experimental garden Kima Atas, North Sulawesi. The study was conducted from January to February 2007 by survey on Salak Dwarf plantation. Observation was done by counting the number of healthy and infected female flowers, larval population, symptoms of attacks, and the natural enemies. The results showed that of 647 palms observed, 118 palms (18.27%) are already flowering, and 529 (81.73%) palms have not yet bearing fruits. Of the total palms that are flowering or fruiting, 34.75% palms are not attacked and 65.25% palms were attacked by, which consisted of a light attack 20.34%, medium attack 22.88%, and heavy attack 22.03%.
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