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All Journal Jurnal Fitopatologi Indonesia Jurnal Penelitian Kelapa Sawit Jurnal Entomologi Indonesia

Agus Eko Prasetyo

Pusat Penelitian Kelapa Sawit

Author-ID : 2452065

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Medicine & Pharmacology

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Laju Infeksi Ganoderma pada Empat Kelas Tekstur Tanah Agus Susanto; Agus Eko Prasetyo; Sri Wening
Jurnal Fitopatologi Indonesia Vol 9 No 2 (2013)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Basal stem rot disease caused by Ganoderma is the most destructive disease in oil palm plantation in Indonesia. Development of this disease is faster and heavier in nutrient poor soils, such as sandy soil. The objective of this research is to study and quantitatively measure the infection rate of Ganoderma disease in sandy soil. The treatments consisted of five different mixtures of mineral soil (M) and sand (P) i.e: A (100% M–0% P), B (75% M-25% P), C (50% M-50% P), D (25% M-75% P), and E (0% M-100% P). Physical, chemical, and biological properties of each soil mixture treatment were analyzed. Soil texture can be differentiated into sandy clay loam, sandy loam, loamy sand, sand for treatmen A, B, C, D, E, respectively. Sandy soil medium had less microorganism population (< 1 × 106 cfu g-1soil) than sandy clay loam which microrganism population was 3 × 106 cfu g-1 soil. The infection rate of Ganoderma in sandy soils was 1.77–1.83 palm per month per 100 palms. Infection rate of Ganoderma in sandy soil was faster and higher than those in loamy soilKey words: basal stem rot, oil plam, sandy soil

Laju Fotosintesis pada Tanaman Kelapa Sawit Terinfeksi Karat daun Cephaleuros virescen Agus Susanto; Agus Eko Prasetyo; Hari Priwiratama; Muhdan Syarovi
Jurnal Fitopatologi Indonesia Vol 16 No 1 (2020)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Photosynthesis Rate of Oil Palm Infected by Red Rust Cephaleuros virescens The incidence of oil palm red rust disease caused by Cephaleuros virescens tends to increase in Indonesia. However, the loses due to this disease has never been measured quantitatively. This study was conducted to measure the rate of photosynthesis on 5-year-old palms with 3 infection categories, i.e. mild, medium, and heavy infection. Field observation of oil palm in Kalianta showed that the infection of red rust disease occurred starting from lower to the upper fronds. Higher infection was prevalently on the adaxial than abaxial leaf. The red rust infection on frond number 17 or younger severely affects the photoshynthesis rate of the oil palm. On the palm with heavy infection category, the photosynthesis rate on frond number 9 was decreased up to 42.48%, i.e. from 15.51 µmol to 8.92 µmol, compared to that with mild infection.

EFEKTIVITAS FLUBENDIAMIDA DALAM PENGENDALIAN ULAT API Setothosea asigna Van Eecke, ULAT KANTUNG Metisa plana Walker, DAN PENGGEREK TANDAN Tirathaba rufivena Walker SERTA PENGARUHNYA TERHADAP AKTIVITAS KUMBANG PENYERBUK Elaeidobius kamerunicus Faust.EFEKTI Hari Priwiratama; Tjut Ahmad Perdana Rozziansha; Agus Eko Prasetyo
Jurnal Penelitian Kelapa Sawit Vol 26 No 3 (2018): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Flubendiamide is a new insecticide that highly selective against Lepidopteran insect pests. A research was conducted to determine the effects of flubendiamide application on the mortality of nettle caterpillar S. asigna, bagworm M. plana, and bunch moth T. rufivena on mature oil palm. In addition, we also investigated the effects of flubendiamide application on the activity of pollinating weevil E. kamerunicus. Flubendiamide was sprayed directly on the affected oil palm canopy or fruit bunches at the application rate of 0, 50, 100, 150, and 200 mL/ha. On the other hand, flubendiamide was sprayed directly on the anthesis male inflorescences at the dose of 150 mL/ha to study for its impacts against the activity of E. kamerunicus. The results showed that the mortality of each pest increased in line with the dose of application. Flubendiamide was effective against the leaf-eating caterpillar at the application rate of 150-200 mL/ha whilst the application of 200 mL/ha flubendiamide was required for controlling the bunch moth. Moreover, the application of flubendiamide had no adverse effects on the activity and the development of E. kamerunicus on male inflorescences.

KEANEKARAGAMAN SERANGGA PADA EKOSISTEM KELAPA SAWIT TERPAPAR INSEKTISIDA DALAM JANGKA PANJANG Agus Eko Prasetyo; Tjut Ahmad Perdana Rozziansha; Mahardika Gama Pradana; Agus Agus Susanto
Jurnal Penelitian Kelapa Sawit Vol 27 No 3 (2019): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Penelitian keanekaragaman serangga meliputi informasi jenis, nilai keanekaragaman dan kekayaan jenis serangga mulai banyak dilakukan berkaitan dengan penggunaan insektisida dalam mengendalikan hama di perkebunan kelapa sawit. Aplikasi insektisida jangka panjang selama 9 bulan dengan rotasi aplikasi dua minggu sekali telah dilakukan sebagai kajian informasi tentang penurunan jenis dan keanekaragaman serangga di perkebunan kelapa sawit. Jenis insektisida yang digunakan terdiri dari insektisida Fipronil, insektisida biologis Bacillus thuringiensis (Bt) dan kombinasi insektisida Klorantraniliprol (1 kali) dan Bt (3 kali). Penangkapan serangga digunakan perangkap nampan kuning, Malaise trapdan jaring serangga. Berdasarkan hasil pengamatan, serangga yang tertangkap pada seluruh lokasi pengamatan sejumlah 7.943 individu, yang terdiri dari 80 Famili dan 11 Ordo. Nilai indeks keanekaragaman dan jumlah individu pada lokasi dengan aplikasi insektisidakimia Fipronillebih rendah daripada perlakuan lain yang disebabkan berkurangnya jumlah famili dan individu, sedangkan pada lahan dengan aplikasi insektisida biologisBt maupun kombinasinya dengan insektisida kimia Klorantraniliprol relatif tidak mempengaruhi indeks keanekaragaman dan nilai sebaran serangga.

Dampak aplikasi kumatetralil dan Sarcocystis singaporensis terhadap serangan hama tikus di perkebunan kelapa sawit Mahardika Gama Pradana; Hari Priwiratama; Agus Eko Prasetyo; Agus Susanto
Jurnal Penelitian Kelapa Sawit Vol 29 No 3 (2021): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iopri.jur.jpks.v29i3.155

The management of rat attack in oil palm plantation is commonly achieved through rodenticide application as well as in combination with the utilization of natural enemies. In this study, field efficacy of two rodenticide active ingredients i.e. coumatetralyl and Sarcocystis singaporensis against Rattus tiomanicus was conducted in mature oil palm blocks. The experiment was carried out in a randomized complete block design consisting of 3 treatments and 6 blocks/replicates. The application of coumatetralyl was conducted at the dose of 1 block bait per palm, while S. singaporensis treatment was conducted at the dose of 2 pellets per palm. The rodenticide application was carried out four times at five days interval. The result showed that incidence of rat attack decreased in all experimental blocks. The incidence of rat attack on coumatetralyl treatment was significantly lower than the control block at 5 and 10 days after application (daa), where as S. singaporensis treatment only showed a significant reduction at 5 daa. The average rate of reduction in rat attack during application of coumatetralyl, S. singaporensis, and control treatments was 53.80%; 38.58%; and 21.86%, respectively. The intensity of rat attack on male flowers before application was ranged between 31.87% to 40.64%, while the intensity on fruit bunches was ranged from 4.85% - 7.52%. The decrease in the incidence and intensity of rat attack is in line with the decrease in rodenticide consumption. In coumatetralyl treatment, consumed bait decreased from 75.02% to 57.03%, while in S. singaporensis treatment it decreased from 61.38% to 47.20%. In general, the efficacy value of coumatetralyl was higher than that of S. singaporensis.

Gejala serangan dan tingkat serangan Sparganobasis subcruciata Marshall sebagai hama baru pada kelapa sawit di Indonesia bagian timur Agus Eko Prasetyo; Tjut Ahmad Perdana Rozziansha; Muhayat Muhayat; Roch Desmier de Chenon
Jurnal Entomologi Indonesia Vol 16 No 1 (2019): March
Publisher : Perhimpunan Entomologi Indonesia

Sparganobasis subcruciata Marshall is a species of weevil occurring in Papua and eastern parts of Indonesia, which had been begun found to causes damage to oil palm in the Boven Digoel district. The research was carried out to investigate the symptoms of S. subcruciata attack and it’s damage level in one of oil palm plantation in Boven Digoel. The result shows that larvae of this weevil bore into the stem, particularly the lower part, giving rise to symptoms which are similar to symptoms of Ganoderma disease, specifically the occurrence of more than three leaves in the spear failing to open, hanging down and drying out and the ultimate death of the palm. The weevil has been detected in Boven Digoel, Papua, where significant numbers of oil palms appeared to be dead or dying in each of the plantation visited by us. We consider that this weevil constitutes a major threat to oil palm plantations in Papua and that it may in the future, if it is not already the case, be a threat to plantations in Eastern Indonesia. Early detection of the presence of the weevil is difficult and requires research, as do methods of control, which we suggest should focus on the development and use of pheromones.

Co-Authors Agus Agus Susanto Agus Susanto Hari Priwiratama Mahardika Gama Pradana Mahardika Gama Pradana Muhayat Muhayat Muhdan Syarovi Roch Desmier de Chenon Sri Wening Tjut Ahmad Perdana Rozziansha

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