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All Journal Buletin Tanaman Tembakau, Serat & Minyak Industri Jurnal Pembangunan dan Alam Lestari Buletin Tanaman Tembakau, Serat & Minyak Industri
Bambang Tri Rahardjo
Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management

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Pengaruh PGPR terhadap Penekanan Populasi Nematoda Puru Akar (Meloidogyne incognita (Kofoid and White) Chitwood) pada Tanaman Kenaf (Hibiscus cannabinus L.) Kristiana Sri Wijayanti; Bambang Tri Rahardjo; Toto Himawan
Buletin Tanaman Tembakau, Serat & Minyak Industri Vol 8, No 1 (2016): April 2016
Publisher : Balai Penelitian Tanaman Pemanis dan Serat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/bultas.v8n1.2016.30-39

Abstract

Tanaman kenaf yang terinfeksi nematoda Meloidogyne incognita  dapat mempengaruhi pertumbuhan tanaman dan produksi serat. Penelitian ini bertujuan untuk mengevaluasi pengaruh Plant Growth Promoting Rhizobacteria (PGPR) dalam menekan populasi nematoda M. incognita pada tanaman kenaf di rumah kaca. Penelitian dirancang dengan menggunakan rancangan acak kelompok (RAK) faktorial dengan dua faktor, faktor pertama adalah cara aplikasi PGPR yang terdiri atas 2 cara yaitu suspensi PGPR diberikan sebelum tanam dengan merendam benih selama 5 jam (C1), benih ditanam langsung dalam pot tanpa direndam dalam PGPR (C2), dan suspensi PGPR diberikan pada 15 hari setelah tanam (HST) dan 25 HST. Faktor kedua adalah jenis PGPR yang digunakan yaitu Pseudomonas fluorescens, Bacillus subtilis, Azotobacter sp., P. fluorescens + B. subtilis, P. fluorescens + Azotobacter sp., B. subtilis + Azotobacter sp., dan P. fluorescens + B. subtilis + Azotobacter sp., serta kontrol (tanpa PGPR).  Hasil penelitian menunjukkan bahwa perendaman benih dengan kombinasi tiga bakteri memberikan pengaruh yang nyata terhadap populasi juvenil nematoda dalam tanah, sedangkan perlakuan tanpa perendaman tidak memberikan pengaruh. Populasi juvenil nematoda di dalam akar yang diberi PGPR baik tunggal maupun kombinasi melalui perendaman benih atau tanpa perendaman benih tidak berpengaruh, kecuali pada kombinasi P. fluorescens dan B. subtilis yang diberikan melalui perendaman benih mampu menekan populasi juvenil nematoda di akar 43,28% bila dibandingkan tanpa perendaman benih. Pemberian rizobakteri P. fluorescens  menurunkan jumlah telur nematoda terbanyak (86,39%) dan menekan intensitas penyakit sebesar 71,95% bila dibandingkan kontrol.Infection of Meloidogyne incognita on kenaf could affect its growth and the production of fiber. This study aimed to evaluate the effect of PGPR on the reduction of nematode M. incognita population on kenaf in the greenhouse. The factorial experiment was laid on randomized block design. The study consisted of two factors with three replicates . The first factor was method of PGPR application, ie: PGPR suspension was given before planting (kenaf seeds was soaked for 5 hours) (C1) and the seeds directly planted without submerged (C2), PGPR suspension was given at 15 days after planting (DAP) and 25 dap. The second factor was type of bacteria (Pseudomonas  fluorescens,  Bacillus  subtilis,  Azotobacter  sp.,  P.  fluorescens + B. subtilis, P. fluorescens + Azotobacter  sp., B. subtilis + Azotobacter  sp.,  and  P.  fluorescens  +  B. subtilis   + Azotobacter  sp.) and control. The results showed that submerged seed with the three bacterial rhizobacteria significant compared to the control treatment and single treatment and two combination rhizobacteria, while without submerged seed with single or combination rhizobacteria not significant on the population of juvenile nematodes in the soil. Combination of P. fluorescens and B. subtiliswith submerged seed capable of suppressing the population of  juvenile  nematodes  in the  roots  of 43.28%  when  compared with or without submerged seed.   Population  of  juvenile  nematodes  in the  roots by submerged seed and without submerged seed either single or combination rhizobacteria do not affect each other. P. fluorescens suppress nematode eggs are highest 86.39% and disease intensity by 71,95% where compared to control.
Endophyte Initiation Beauveria bassiana (Balsamo) Vullemin (Hypocreales: Cordycipitaceae) in Reduction of Aphis glycine Matsumura (Hemiptera: Aphididae) Investation in Soybean (Glycine max (L.) Merrill) Plant Mufidah Afiyanti; Rina Rachmawati; Achmad Faisal Akbar; Rose Novita Sari Handoko; Bambang Tri Rahardjo
Indonesian Journal of Environment and Sustainable Development Vol 10, No 1 (2019)
Publisher : Graduate Program

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpal.2019.010.01.04

Abstract

Soybean (Glycine max (L.) Merrill) is a universal important plant. Its production has decreased each year. A major problems is a pest known as Aphis glycine Matsumura (Hemiptera: Aphididae) which caused the decline of yield up to 40%. Thus, there is a need to control A. glycine. Recent studies showed B. bassiana has a potency as endophyte in Vicia faba (Fabaceae) plant tissue. It could harm A. gossypii and causes death up to 57,7%. Therefore, the aim of this research is to control infestation of A. glycine by using B. bassiana. This research used Randomized Block Design with soybean plant Anjasmoro variety as samples. The initiation of B. bassiana was conducted by using seed-soaking and soil-wetting methods. The results showed that fungus B. bassiana was able to colonize soybean plants with a percentage of colonization reaching 6.67%. Colonization was only found in the stems of soybean plants in the seed immersion treatment with the susceptibility of B. bassiana fungus in density of 108 conidia / mL for 2 hours, colonization on the stem itself by 20%. Fungus density results from evaluation of 1.6 x 105 conidia / mL and conidial viability reached 87.4%. There were no deaths and changes in the population of A. glycine aphids. Direct pathogenicity testing has a significant effect on the treatment between observations of the second day. Initiation of B. bassiana fungi did not significantly affect plant height and number of leaf branches. This results conclude that B. bassiana may function as endophyte in soybean plants. However, its function in reduction of greenfly still need further researchKeywords: Biological control, Environmental pest management, Greenfly
Pengaruh PGPR terhadap Penekanan Populasi Nematoda Puru Akar (Meloidogyne incognita (Kofoid and White) Chitwood) pada Tanaman Kenaf (Hibiscus cannabinus L.) Kristiana Sri Wijayanti; Bambang Tri Rahardjo; Toto Himawan
Buletin Tanaman Tembakau, Serat & Minyak Industri Vol 8, No 1 (2016): April 2016
Publisher : Balai Penelitian Tanaman Pemanis dan Serat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.357 KB) | DOI: 10.21082/bultas.v8n1.2016.30-39

Abstract

Tanaman kenaf yang terinfeksi nematoda Meloidogyne incognita  dapat mempengaruhi pertumbuhan tanaman dan produksi serat. Penelitian ini bertujuan untuk mengevaluasi pengaruh Plant Growth Promoting Rhizobacteria (PGPR) dalam menekan populasi nematoda M. incognita pada tanaman kenaf di rumah kaca. Penelitian dirancang dengan menggunakan rancangan acak kelompok (RAK) faktorial dengan dua faktor, faktor pertama adalah cara aplikasi PGPR yang terdiri atas 2 cara yaitu suspensi PGPR diberikan sebelum tanam dengan merendam benih selama 5 jam (C1), benih ditanam langsung dalam pot tanpa direndam dalam PGPR (C2), dan suspensi PGPR diberikan pada 15 hari setelah tanam (HST) dan 25 HST. Faktor kedua adalah jenis PGPR yang digunakan yaitu Pseudomonas fluorescens, Bacillus subtilis, Azotobacter sp., P. fluorescens + B. subtilis, P. fluorescens + Azotobacter sp., B. subtilis + Azotobacter sp., dan P. fluorescens + B. subtilis + Azotobacter sp., serta kontrol (tanpa PGPR).  Hasil penelitian menunjukkan bahwa perendaman benih dengan kombinasi tiga bakteri memberikan pengaruh yang nyata terhadap populasi juvenil nematoda dalam tanah, sedangkan perlakuan tanpa perendaman tidak memberikan pengaruh. Populasi juvenil nematoda di dalam akar yang diberi PGPR baik tunggal maupun kombinasi melalui perendaman benih atau tanpa perendaman benih tidak berpengaruh, kecuali pada kombinasi P. fluorescens dan B. subtilis yang diberikan melalui perendaman benih mampu menekan populasi juvenil nematoda di akar 43,28% bila dibandingkan tanpa perendaman benih. Pemberian rizobakteri P. fluorescens  menurunkan jumlah telur nematoda terbanyak (86,39%) dan menekan intensitas penyakit sebesar 71,95% bila dibandingkan kontrol.Infection of Meloidogyne incognita on kenaf could affect its growth and the production of fiber. This study aimed to evaluate the effect of PGPR on the reduction of nematode M. incognita population on kenaf in the greenhouse. The factorial experiment was laid on randomized block design. The study consisted of two factors with three replicates . The first factor was method of PGPR application, ie: PGPR suspension was given before planting (kenaf seeds was soaked for 5 hours) (C1) and the seeds directly planted without submerged (C2), PGPR suspension was given at 15 days after planting (DAP) and 25 dap. The second factor was type of bacteria (Pseudomonas  fluorescens,  Bacillus  subtilis,  Azotobacter  sp.,  P.  fluorescens + B. subtilis, P. fluorescens + Azotobacter  sp., B. subtilis + Azotobacter  sp.,  and  P.  fluorescens  +  B. subtilis   + Azotobacter  sp.) and control. The results showed that submerged seed with the three bacterial rhizobacteria significant compared to the control treatment and single treatment and two combination rhizobacteria, while without submerged seed with single or combination rhizobacteria not significant on the population of juvenile nematodes in the soil. Combination of P. fluorescens and B. subtiliswith submerged seed capable of suppressing the population of  juvenile  nematodes  in the  roots  of 43.28%  when  compared with or without submerged seed.   Population  of  juvenile  nematodes  in the  roots by submerged seed and without submerged seed either single or combination rhizobacteria do not affect each other. P. fluorescens suppress nematode eggs are highest 86.39% and disease intensity by 71,95% where compared to control.
Co-Authors Achmad Faisal Akbar Kristiana Sri Wijayanti Kurnia Paramita Sari Mufidah Afiyanti Nurul Aini Rina Rachmawati Rose Novita Sari Handoko Toto Himawan