Effect of endomycorrhiza fungi Glomus spp. on induction of resistance in potato plants against Rhizoctonia solani

2020 ◽  
Vol 73 (2) ◽  
pp. 213-217
Author(s):  
Seddiqe Mohammadi ◽  
Elnaz Shahabi ◽  
Ali Kasraian
Keyword(s):  
Rhizoctonia Solani ◽  
Potato Plants ◽  
Glomus Spp ◽  
Induction Of Resistance

scholarly journals Anastomosis Groups and Pathogenicity of Rhizoctonia solani and Binucleate Rhizoctonia from Potato in South Africa

Plant Disease ◽  
2015 ◽  
Vol 99 (12) ◽  
pp. 1790-1802 ◽  
Author(s):  
N. Muzhinji ◽  
M. Truter ◽  
J. W. Woodhall ◽  
J. E. van der Waals
Keyword(s):  
South Africa ◽  
Rhizoctonia Solani ◽  
Stem Canker ◽  
Black Scurf ◽  
Bootstrap Support ◽  
Internal Transcribed Spacer Region ◽  
Binucleate Rhizoctonia ◽  
Anastomosis Groups ◽  
Potato Plants ◽  
Comprehensive Survey

A survey of anastomosis groups (AG) of Rhizoctonia spp. associated with potato diseases was conducted in South Africa. In total, 112 Rhizoctonia solani and 19 binucleate Rhizoctonia (BNR) isolates were recovered from diseased potato plants, characterized for AG and pathogenicity. The AG identity of the isolates was confirmed using phylogenetic analysis of the internal transcribed spacer region of ribosomal DNA. R. solani isolates recovered belonged to AG 3-PT, AG 2-2IIIB, AG 4HG-I, AG 4HG-III, and AG 5, while BNR isolates belonged to AG A and AG R, with frequencies of 74, 6.1, 2.3, 2.3, 0.8, 12.2, and 2.3%, respectively. R. solani AG 3-PT was the most predominant AG and occurred in all the potato-growing regions sampled, whereas the other AG occurred in distinct locations. Different AG grouped into distinct clades, with high maximum parsimony and maximum-likelihood bootstrap support for both R. solani and BNR. An experiment under greenhouse conditions with representative isolates from different AG showed differences in aggressiveness between and within AG. Isolates of AG 2-2IIIB, AG 4HG-III, and AG R were the most aggressive in causing stem canker while AG 3-PT, AG 5, and AG R caused black scurf. This is the first comprehensive survey of R. solani and BNR on potato in South Africa using a molecular-based approach. This is the first report of R. solani AG 2-2IIIB and AG 4 HG-I causing stem and stolon canker and BNR AG A and AG R causing stem canker and black scurf on potato in South Africa.

Interactions between field populations of the potato cyst nematode Globodera pallida and Rhizoctonia solani diseases of potatoes under controlled environment and glasshouse conditions

Nematology ◽  
2010 ◽  
Vol 12 (5) ◽  
pp. 783-790 ◽  
Author(s):  
Shuvash Bhattarai ◽  
Patrick P.J. Haydock ◽  
Matthew A. Back ◽  
Martin C. Hare ◽  
William T. Lankford
Keyword(s):  
Rhizoctonia Solani ◽  
Early Stage ◽  
Disease Incidence ◽  
Globodera Pallida ◽  
Controlled Environment ◽  
Second Stage ◽  
Potato Plants ◽  
Juvenile Population ◽  
Controlled Environments ◽  
Two Populations

Abstract This research elucidates interactions between Globodera pallida and Rhizoctonia solani (AG3) by comparing disease development in potato plants inoculated with G. pallida and R. solani. The effects of juvenile population density and time of infestation on R. solani disease were investigated in controlled environments. Plants were inoculated with a range of densities of second-stage juveniles (J2) of G. pallida (800, 4000, 10 000, 20 000 and 40 000 J2/plant) and R. solani at 2, 4 and 6 weeks after planting and a single treatment of G. pallida density and R. solani alone. The experiment demonstrated that greatest disease incidence and severity occurred when high population densities of G. pallida were applied at an early stage of plant development. To determine if this effect could explain differences in R. solani disease incidence and severity following interactions with individual field populations of G. pallida, a glasshouse experiment was conducted using two populations of G. pallida with known hatching characteristics (fast and slow hatching). The experiment revealed that a combination of a fast-hatching population with R. solani caused significantly more R. solani disease incidence and severity than a population of G. pallida with slower hatching characteristics.

scholarly journals In vitro evaluation of fungicidal responses on the growth of pathogenic Rhizoctonia solani Kuhn, antagonistic binucleate Rhizoctonia and Trichoderma harzianum Rifai

1970 ◽  
Vol 39 (1) ◽  
pp. 107-110
Author(s):  
Md Maniruzzaman Khandaker ◽  
Md Khurshed Alam Bhuiyan ◽  
Abul Khair
Keyword(s):  
Boric Acid ◽  
Rhizoctonia Solani ◽  
Key Words ◽  
Trichoderma Harzianum ◽  
Stem Canker ◽  
Black Scurf ◽  
Binucleate Rhizoctonia ◽  
Crop Fields ◽  
Potato Plants

Two pathogenic isolates of Rhizoctonia solani Kuhn causing stem canker/black scurf disease of potato plants and four antagonist isolates, two of binucleate Rhizoctonia and two of Trichoderma harzianum Rifai were isolated from crop fields and evaluated in vitro for their fungicidal responses against eight fungicides. Vitavax was effective in inhibiting the growth of R. solani and binucleate Rhizoctonia but it did not inhibit the growth of T. harzianum at 100 ppm concentration. Terraclor Super X, Dithane M 45 and Boric acid are the fungicides which at 100 ppm concentration did not inhibit the growth of antagonist isolates of T. harzianum and binucleate Rhizoctonia but inhibited the growth of isolates of R. solani to some extent. The in vitro findings suggest that any one of these three fungicides along with antagonist isolates of binucleate Rhizoctonia and T. harzianum can be used as biocontrol agents to reduce soil borne inocula of R. solani. Key words: Rhizoctonia solani; Binucleate; Trichoderma harzianum; Fungicide DOI: 10.3329/bjb.v39i1.5534Bangladesh J. Bot. 39(1): 107-110, 2010 (June)

scholarly journals Influence of Bacillus Spp. Based Bioproducts on Potato Plant Growth and Control of Rhizoctonia Solani

2019 ◽  
Vol 76 (1) ◽  
pp. 29
Author(s):  
Sorina DINU ◽  
Oana Alina BOIU-SICUIA ◽  
Florica CONSTANTINESCU
Keyword(s):  
Plant Growth ◽  
Rhizoctonia Solani ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Aqueous Suspension ◽  
Potato Plants ◽  
Bacillus Spp ◽  
Seeding Material ◽  
Biocontrol Potential ◽  
And Control

Some Bacillus based bioproducts were analyzed for their plant growth promotion and Rhizoctonia solani biocontrol potential in potato plants. The bioproducts were formulated as concentrated aqueous suspension, each containing one of the following plant beneficial bacteria: Bacillus safensis Rd.b2, Bacillus spp. 75.1s and Cp.b4 strains. These were applied on potato seeding material in order to evaluate plant growth promotion effects. The biocontrol efficacy was also evaluated, using Rhizoctonia solani DSM 63002 as plant pathogen, and Prestige 290FS as reference chemical treatment.In the plant growth-promotion experiments, several biologic parameters were biometrically evaluated. Best results regarding plant growth and vigor were obtained using CropMax, a commercial phytostimulatory product. However, the bacterial treatment with Bacillus spp. Cp.b4 and 75.1s showed an improved plant growth compared to the untreated control. An efficacy of 93.75% against Rhizoctonia dumping-off was registered when using the Prestige 290FS chemical control. Mix treatments based on this pesticide, in low dose, combined with Cp.b4 or 75.1s biocontrol strains significantly reduced the pathogenic attack, showing 85 to 87.5% efficacy.The present research demonstrated that the bacterial bioproducts based on Bacillus spp. 75.1s and Cp.b4 strains increase plant growth and are highly effective in controlling Rhizoctonia attack in potato plants.

Effet de composés phénoliques et de substances provenant de l'appareil souterrain de la Pomme de terre sur la croissance et la sclérotifïcation in vitro du Rhizoctonia solani

1990 ◽  
Vol 68 (1) ◽  
pp. 43-49
Author(s):  
B. E. Otrysko ◽  
G. J. Banville ◽  
A. Asselin
Keyword(s):  
Phenolic Compounds ◽  
Rhizoctonia Solani ◽  
Mycelial Growth ◽  
Water Soluble ◽  
Potato Plants ◽  
Pomme De Terre ◽  
Composés Phénoliques ◽  
Visible Effect

We tested the hypothesis that phenolic compounds initiate the formation of sclerotia in Rhizoctonia solani AG 3. Water soluble substances were recovered in situ from the underground parts of undisturbed potato plants by adsorption onto columns fitted with a water circulating device. These extracts inhibited mycelial growth of five isolates of R. solani belonging to anastomosis groups AG 1, AG 2, AG 3 and AG 4. However, there was no effect on the initiation of sclerotia. Fourteen phenolic compounds were bioassayed in vitro at concentrations ranging from 10−3 to 10−6 M against these same isolates. Phenolic acids had no significant effect on mycelial growth, whereas the substituted aldehydes were inhibitory at 10−3 and 10−4 M. There was no visible effect on sclerotial initiation.

scholarly journals Induction of Resistance against Soybean Damping-off caused by Rhizoctonia solani

2014 ◽  
Vol 42 (2) ◽  
pp. 137-158
Author(s):  
Marwa Atwa ◽  
Shehata Shehata ◽  
Mohamed Rahhal
Keyword(s):  
Rhizoctonia Solani ◽  
Damping Off ◽  
Induction Of Resistance
Sign in / Sign up

Export Citation Format

Share Document