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All Journal Jurnal MIPA Jurnal Bios Logos EUGENIA Akta Agrosia The Studies of Social Sciences Vivabio : Jurnal Pengabdian Multidisiplin
Parluhutan Siahaan
Jurusan Biologi Fakultas MIPA Universitas Sam Ratulangi Manado 95115
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences

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Journal : Akta Agrosia

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Host Diversity of Beauveria bassiana (Balsamo) Vuillemin in Rice Field in Bolaang Mongondow Regency Siahaan, Parluhutan; Saroyo, Saroyo; Langoy, Marnix L.D.; Saimima, Arie J.
Akta Agrosia Vol 24 No 2 (2021)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Abstract

Beauveria bassiana can attack a variety of hosts and their virulence can vary at each host and location. Exploration of the diversity of hosts B. bassiana from local isolates needs to be done as initial information that can explain the ability of B. bassiana in infecting insects. Sampling locations were selected in three district, each district selected three stations and each station consisted of 10 plots. The location of sampling is determined by the purposive random sampling method. Each station was made a plot measuring 1m x 1m and distributed randomly. Every insect infected with B. bassiana was taken and taken to a laboratory for identification. The results showed that there were five insects that hosted B. bassiana, namely Nilaparvata lugens, Scotinophara coarctata, Leptocorisa oratorius, Nezara viridula and Paraeucosmetus pallicornis. The highest host diversity index was found in North Dumoga with a value of 1.47. The highest abundance index was found in N. lugens host in East Dumoga with a value of 43%. The highest density was found in the host N. lugens in Central Dumoga with a value of 1.93 ind / m2. There were indications of differences in virulence of the  B. bassiana local isolates that were influenced by the spesies of host and location Keywords: Beauveria bassiana, diversity,  Bolaang Mogondow Regency, diversity and abundance indices
Vegetative Growth Response of Soybean (Glycine max L. Merril) After Applicated Several Plant Growth Regulators (PGRs) Mangais, Rowland; Rampe, Henny L.; Siahaan, Parluhutan
Akta Agrosia Vol 25 No 1 (2022)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Vegetative growth of plants can be influenced by internal factors including hormones (Plant Growth Regulators). The purpose of the study is to determine the growth response of soybean ( Glycine max L.Merril) after application of some plant growth regulators (PGRs). The research method used was Completely Randomized Design (CRD). There were four levels of extract concentration that were applied namely P0: Control, P1: onion extract, P2  bamboo shoot extract, and P3:  banana weevil extract. Data of the growt parameters were analyzed with ANOVA (Analysis of Variance) and continued with LSD 0.05 test. Results of the study showed that the application of PGRs from extracts of onion , bamboo shoots and banana weevil give the  increase of growth in height of plants  in 15 days after planting, fresh  weight, dry wight and root volume  of soybean (G. max). Application of PGRs couldn’t give any effect in high, number of leaves and ratio of canopy roots 27 days after planting.Keywords : Glycine max L. Merril , Vegetative growth, and Plant Growth  Regulators (PGRs
Co-Authors Adelfia Papu Ai S Nio Anwar Sahid Baideng, Eva Desti, Yunita DINGSE PANDIANGAN Edwin de Queljoe Kakanga, Christin J.R. Koda, Marlince Mangais, Rowland Mangansige, Crestie T. Marhaenus J. Rumondor Marnix L.D. Langoy Marnix Langoy Mereh, Risa Junita Nio Song Ai Orpa Smarce Fransina Manori Patricia Claudya Torey Pirade, Monalisa Rampe, Henny L. Redsway T.D Maramis Roni Koneri Sagay, Kezia Sisilia Saimima, Arie J. Santoso, Ardelia Qonita Saroyo Saroyo Siahaan, Saroyo Sonke, Natasya Gloria Susan M Mambu Susan Mambu Susan Marlein Mambu Tangapo, Agustina Monalisa Tjolleng, Fitria Tri A. Mokodompit Wongkar, Jusak Wowiling, Susan Yelni Gogahu, Yelni Yunia E Banyo