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All Journal Jurnal Fitopatologi Indonesia Jurnal Penelitian Kelapa Sawit

Agus Susanto

Indonesian Oil Palm Research Institute

Author-ID : 2452108

Agriculture, Biological Sciences & Forestry Medicine & Pharmacology

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Ganoderma boninense Penyebab Penyakit Busuk Batang Atas Kelapa Sawit Agus Susanto; Agus Eko Prasetyo; Hari Priwiratama; Sri Wening; Surianto Surianto
Jurnal Fitopatologi Indonesia Vol 9 No 4 (2013)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Basal stem rot disease (BSR) caused by Ganoderma boninense is the major pathogen of oil palm in Indonesia and Malaysia. Sometimes in the same location, especially in the peatland, upper stem rot (USR) disease is also found. This research was carried out to identify the pathogen of upper stem rot by molecular approach. Fruiting bodies of fungus were collected from 3 plants with upper stem rot symptoms and 2 plants with basal stem rot symptoms from Labuhan Batu North Sumatra and Kampar Riau. Results showed that all of the fruiting body samples taken from plants with upper stem rot and basal stem rot symptoms were G. boninense.

PERKEMBANGAN POPULASI Elaeidobius kamerunicus FAUST PASCA INTRODUKSI DAN PENINGKATAN FRUIT SET KELAPA SAWIT DI PULAU SERAM, MALUKU, INDONESIA Agus Eko Prasetyo; Agus Susanto
Jurnal Penelitian Kelapa Sawit Vol 24 No 1 (2016): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Elaeidobius kamerunicus is the main pollinating agent in oil palm plantations in Indonesia today. The development of oil palm plantations in new areas requires introduction of these insects, moreover the new areas are located on different islands. First introduction of Elaeidobius kamerunicus Faust had been done from North Sumatra to Seram Island on 23 September 2013. The introduction was performed on larva and pupa stadium in 4-5 days post anthesising of male inflorescences. The introduction of E. kamerunicus using plywood boxes has an average risk of death by 7.89% at 6 days delivery period. Observation before releasing of the weevils showed that this insect was not detected in both of oil palm male and female flowers and the oil palm fruit set was very low approximately 11.27%. For about 500 weevils/ha were released in Marnuhu estate and could be developed into 362,401 weevils/ha in 5 months with 97.86% of oil palm sex ratio. The oil palm fruit sets were increased after 1 and 2 months introduction, 53.70% and 75.56 %, respectively. The lower sex ratio of oil palm or the more availability of male inflorescences make growth of E. kamerunicus population became faster and the greater number of weevils that visiting anthesising of female flowers make the higher value of oil palm fruit set.

KEEFEKTIFAN FUNGISIDA TERHADAP ISOLAT CENDAWAN TERBAWA BENIH KELAPA SAWIT Donnarina Simanjuntak; Rokhana Faizah; Agus Eko Prasetyo; Agus Susanto
Jurnal Penelitian Kelapa Sawit Vol 25 No 1 (2017): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Oil palm seed is known to bring some pathogenic microbes and reduce the quality of seeds. Research aims to determine the effectiveness of fungicide active ingredients and later as a recommendation fungicide to control fungal isolates carried by oil palm seeds. Research were conducted in the Plant Protection laboratory, IOPRI business unit of Marihat, from April to October 2016. Research using descriptive analysis of seeds and seed health testing methods used consisted of visual observation of seeds and washing test. Seeds obtained from six production sites namely derpericarping, seed selection, first immersion, first winding, germination chamber, and distribution of germinated seed. The fungicides used consist of 39 different types of active ingredients. From the results of seed health testing there are three fungi carried by seeds that have been isolated, ie Aspergillus, Penicillium, and Mucor. These three fungi were further tested against 39 types of fungicides and the result there are 13 to 18 of fungicides that are effective to suppress the growth rate of the three fungi until the seventh day after the application.

PENGARUH INSEKTISIDA TERHADAP AKTIVITAS DAN KEMUNCULAN KUMBANG BARU Elaeidobius kamerunicus FAUST (COLEOPTERA: CURCULIONIDAE) PADA BUNGA JANTAN KELAPA SAWIT (Elaeis guineensis Jacq.) Agus Eko Prasetyo; Agus Susanto
Jurnal Penelitian Kelapa Sawit Vol 27 No 1 (2019): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Elaeidobius kamerunicus is the main pollinating insect in oil palm plantations in Indonesia which influences the oil palm fruit set. Theoil palm (Elaeis guineensis) male inflorescence is the only one of their breeding site. The application of insecticides, especially those directly to the male inflorescence, can affect the activity and breeding of pollinator insects. Various insecticides include Deltamethrin (2 mL/L), Lamda Sihalotrin (2 mL/L), Dimehipo (2 mL/L), Asefat (1.5 g/L), Fipronil (2.5 mL/L), Chlorantraniliprol (1 mL/L), Flubendiamide (0.5 mL/L) and B. Thuringiensis (2 mL/L) have been tested on E. kamerunicus weevils by in vivo trial and on anthesising male inflorescence at different levels of bloom (25 %, 50%, 75% and 100%) in the field. The weevils mortality observations were carried out for 5 days after the insecticides application in the laboratory while observations in the field included the number of weevils visit before and after insecticide application until the end of the male flower anthesis and the number of new emerged weevil in each spikelet after 21 days of incubation. The results showed that the chemical insecticides i.e. Deltametrin, Lamda Sihalotrin, Dimehipo, Asefat, and Fipronil were killed the weevil, affecting the weevil visit on anthesising male inflorescence 1-3 days later, and decreasing the number of new emerged weevil from each spikelet of male inflorescence after incubation for 21 days. Meanwhile, the treatment of Chlorantraniliprole and Flubendiamide and B. thuringiensis did not affect the development of E. kamerunicus both in the laboratory and in the field so that they were safe for oil palm pollinating naturally.

Co-Authors Agus Eko Prasetyo Donnarina Simanjuntak Hari Priwiratama Rokhana Faizah Sri Wening Surianto Surianto

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