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Agus Susanto
Pusat Penelitian Kelapa Sawit, Medan
Medicine & Pharmacology

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Respons Curvularia lunata Penyebab Penyakit Bercak Daun Kelapa Sawit terhadap Berbagai Fungisida Agus Susanto; Agus Eko Prasetyo
Jurnal Fitopatologi Indonesia Vol 9 No 6 (2013)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.166 KB) | DOI: 10.14692/jfi.9.6.165

Abstract

Leaf spot disease of oil palm caused by Curvularia sp. is the major disease in nursery. Implementation of best nursery practices is the key to prevent it. Generally, fungicides are used only if epidemic of leaf spot diseases occur in the field. The objectives of this research were to determine causal agent of leaf spot disease of oil palm and the potential alternative weed host around the nursery, to select suitable fungicides, and to study the effect of fungicides rotation to disease incidence. The results showed that the causal agent of leaf spot disease of oil palm was Curvularia lunata. The fungus was also found on grasses, Cyperus rotundus and Imperata cylindrica. Difeconazol, copper oxide, and propineb suppressed leaf spot disease in nursery. Application of fungicide by rotation between difeconazol and copper oxide with frequency every 10 days suppressed the development of leaf spot disease of oil palm in the nursery.
Pengendalian Penyakit Busuk Pangkal Batang Kelapa Sawit secara Kultur Teknis Hari Priwiratama; Agus Eko Prasetyo; Agus Susanto
Jurnal Fitopatologi Indonesia Vol 10 No 1 (2014)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (308.722 KB) | DOI: 10.14692/jfi.10.1.1

Abstract

Effort to manage basal stem rot disease (BSR) caused by Ganoderma boninense could be conducted through several cultural practice approaches. Four series of field experiments was conducted to observe the effectiveness of cultural practice methods for controlling the epidemic of basal stem rot due to G. boninense. Sanitation trial consisted of three treatments i.e root sanitation with big hole planting system, big hole without root sanitation, and standard replanting system as comparison. Hole in hole and standard planting system were compared in the hole in hole trial. Digging and mounding trial was conducted in four treatments, i.e. digging and mounding with teer and Trichoderma, digging and mounding with Trichoderma, mounding with Trichoderma, and infected palm without any treatment as comparison. Meanwhile, a 4 m × 4 m trench was used in the isolation trench trial. Annual observation was conducted to determine the disease incidence of BSR in each trial. Results showed that all methods could prevent palms from G. boninense infection in the early stage of oil palm development. Proper root sanitation delayed G. boninense infection until 2 years after treatment (YAT), hole in hole planting system was able to suppress disease incidence up to 7 YAT, digging and mounding was useful to prolong the life of the infected palms up to 3 YAT, meanwhile the use of isolation trench was demonstrated to prevent G. boninense infection to neighboring palms up to 2 YAT.
Co-Authors Agus Eko Prasetyo Hari Priwiratama