scholarly journals Potency of Bacillus subtilis and Lysinibacillus Mixed With Silica Nano Particles and Carbon Fiber in Controlling Potato Leaf Blight Disease [Phytophthora infestans (Mont.) de Bary]

2019 ◽  
Vol 2 (2) ◽  
pp. 54
Author(s):  
Hersanti Wartono ◽  
Fitri Widiantini ◽  
Kirana Sonya Harviana
2019 ◽  
Vol 22 ◽  
pp. 101366 ◽  
Author(s):  
Bhimanagoud Kumbar ◽  
Riaz Mahmood ◽  
S.N. Nagesha ◽  
M.S. Nagaraja ◽  
D.G. Prashant ◽  
...  

Author(s):  
Anna Fitriana ◽  
Lukman Hakim ◽  
Marlina Marlina

Potato leaf blight is caused by Phytophthora infestans fungus is one of the important diseases in potato plants. The decrease in potato production due to P. infestans can reach 90%. Until now, P. infestans pathogen attack is an important problem and there is no fungicide that is really effective against the disease. This study aims to examine the effectiveness of endophytic fungi from potato roots in suppressing the development of P. infestans potato leaf blight disease carried out at University Farm Stasiun Riset Bener Meriah (UFBM) Syiah Kuala University Tunyang Village, Timang Gajah District, Bener Meriah Regency from May to October 2014. The method used is the experimental method. The results of this study indicate that endophytic fungi from the roots of potato plants in coffee skin compost media can suppress the development of leaf blight caused by P. infestans, endophytic fungi from potato plant roots in coffee skin compost media. The best results were found in B9 endophytic fungi isolates with the intensity of the pathogen attack P. infestans 48.00%, the intensity of damage to potato plants due to pathogen P. infestans and 2.60%, the weight of healthy tubers 332.4 grams.


2015 ◽  
Vol 34 (1) ◽  
pp. 21 ◽  
Author(s):  
Wartono Wartono ◽  
Giyanto Giyanto ◽  
Kikin H. Mutaqin

<p>Bacterial leaf blight control in rice (Oryza sativa Lin.) using bactericide is prohibitive, due to its high cost and its negative effect on the environment. Biocontrol when avaible, therefore is the best alternative solution. Bacillus subtilis is a perspective of biocontrol agent to control several plant diseases, because of its ability to produce antimicrobial and produce plant growth promoting substances. This research was aimed to examine the effectiveness of B. subtilis spore formulation by way of seed treatments and foliar sprays, using different frequencies and concentrations, to control bacterial leaf blight disease (BLB) on rice, caused by Xanthomonas oryzae pv. oryzae, and to evaluate its function as plant growth promoter. The experiments were conducted at greenhouse and in the field using factorial design. At the greenhouse experiment, seed treatment and foliar spray, using concentration of 2% produced better result in controlling BLB, and better result on promoting rice plant growth. In the field experiment, application at 2 week interval showed better effect on suppressing the the disease and on increasing yield. Applications of the formulation of B. subtilis B12 spore reduced BLB disease by 21% and potentially increased yield up to 50%.</p>


2020 ◽  
Vol 39 (2) ◽  
pp. 105
Author(s):  
Hanudin Hanudin ◽  
Lia Sanjaya ◽  
Budi Marwoto

<p>Bacterial leaf blight caused by Pseudomonas cichorii is a major disease in chrysanthemum plants almost all over the world. In Indonesia, this pathogen can cause damage to chrysanthemum 10- 60%. Bacteria spread from one plant to another through water droplets from modern irrigation networks as well as conventional irrigation. P. cichorii is a polyphagic pathogen, which infects succulents and others across continents with varying incidence. Symptoms of transmission of this pathogen in each type of plant are always different, and effective control methods have not been found. This article discusses the virulence of pathogens, the incidence of transmission, and recommendations for controlling bacterial leaf blight on chrysanthemums in Indonesia. A search of various references from within and outside the country shows that P. cichorii can be controlled by combining several methods, namely (a) the use of tolerant varieties (Puspita Nusantara, Puspa Kania, Dwina Kencana, Dwina Pelangi, Pasopati, Paras Ratu, and Wastu Kania), (b) technical culture (extracting infected leaves and watering in the morning), and (c) application of synthetic chemical bactericides with active ingredients of hydrogen peroxide and peroxyacetic acid, or biopesticides with active bacterial isolates of the antagonistic bacteria Bacillus subtilis MI600, and B. amyloliquefaciens IN937, and combination of P. fluorescens Pf Irana with Pf Slada-2.</p><p>Keywords: Chrysanthemum, P. chicorii, bacterial leaf blight disease, epidemiology, control</p><p> </p><p><strong>Abstrak</strong></p><p><strong>PENYAKIT HAWAR DAUN BAKTERI (Pseudomonas cichorii (Swingle 1925) (STAPP 1928) PADA TANAMAN KRISAN (Dendranthema grandiflora Tzvelev) DAN UPAYA PENGENDALIANNYA DI INDONESIA</strong></p><p>Hawar daun bakteri yang disebabkan oleh Pseudomonas cichorii merupakan penyakit utama pada tanaman krisan hampir di seluruh penjuru dunia. Di Indonesia, patogen ini dapat menyebabkan kerusakan pada tanaman krisan 10-60%. Bakteri menyebar dari satu tanaman ke tanaman lain melalui tetesan air dari jaringan irigasi modern maupun penyiraman konvensional. P. cichorii merupakan patogen yang bersifat polifag, yang menginfeksi tanaman sukulen dan lainnya di seluruh benua dengan insidensi bervariasi. Gejala penularan patogen ini pada setiap jenis tanaman selalu berbeda, dan belum ditemukan metode pengendalian yang efektif. Artikel ini membahas virulenitas patogen, insidensi penularan, dan rekomendasi pengendalian hawar daun bakteri pada tanaman krisan di Indonesia. Penelusuran dari berbagai referensi dari dalam dan luar negeri menunjukkan P. cichorii dapat dikendalikan dengan memadukan beberapa metode, yaitu (a) penggunaan varietas toleran (Puspita Nusantara, Puspa Kania, Dwina Kencana, Dwina Pelangi, Pasopati, Paras Ratu, dan Wastu Kania), (b) kultur teknis (perompesan daun terinfeksi dan penyiraman pada pagi hari), serta (c) aplikasi bakterisida kimia sintetik berbahan aktif hydrogen peroxide dan peroxyacetic acid, atau biopestisida berbahan aktif isolat bakteri antagonis Bacillus subtilis MI600, dan B. amyloliquefaciens IN937, serta kombinasi P. fluorescens Pf Irana dengan Pf Slada-2.</p><p>Kata kunci: Krisan, P. chicorii, bakteri hawar daun, epidemiologi, pengendalian.</p>


2021 ◽  
Vol 74 (1) ◽  
pp. 181-187
Author(s):  
Mehi Lal ◽  
Sorabh Chaudhary ◽  
Sanjay Rawal ◽  
Sanjeev Sharma ◽  
Manoj Kumar ◽  
...  

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