Effect of volatile and unstable exudates from underground potato plant parts on sclerotium formation by Rhizoctonia solani AG-3 before and after haulm destruction

1990 ◽  
Vol 96 (3) ◽  
pp. 155-170 ◽  
Author(s):  
G. Dijst
Keyword(s):  
Rhizoctonia Solani ◽  
Potato Plant ◽  
Plant Parts ◽  
Haulm Destruction ◽  
Before And After ◽  
Sclerotium Formation

scholarly journals Morphological and pathogenic variations in the isolates of Rhizoctonia solani in Bangladesh

1970 ◽  
Vol 35 (3) ◽  
pp. 375-380 ◽  
Author(s):  
BK Goswami ◽  
KA Bhuiyan ◽  
IH Mian
Keyword(s):  
Rhizoctonia Solani ◽  
Host Range ◽  
Infected Plant ◽  
Agar Plate ◽  
Narrow Host Range ◽  
Ecological Zones ◽  
Plant Parts ◽  
Virulent Isolate ◽  
Wide Host Range ◽  
Avirulent Isolate

Rhizoctonia solani isolates were collected from soil of different agro-ecological zones of Bangladesh and also from infected plant parts of different crops and grasses. Collected isolates were classified into five different cluster groups on the basis of morphological and cultural characters. Five isolates taking one from each of the five different cluster groups were selected to study their pathogenicity and host range on 35 different crops. Pathogenicity and host range of the isolates were determined by planting the seeds in water agar plate infested with R. solani isolates and incubated at 25°C temperatures. After analyzing the morphological and cultural characters of the isolates, it was found that there was no relations between the isolates with respect to their origin from where they were collected. It indicated that the diversity among the isolates was not correlated with their origin. In case of host range and pathogenicity among the five selected isolates of different cluster groups, the isolate JES-16 was an avirulent isolate. The isolate SYL-30 had narrow host range and a low virulent isolate. The isolates DIN-8 and GAZ-18 possessed wide host range and might be considered as virulent isolates. The isolate GAZ-9 was a highly virulent isolate with a wide host range. Keywords: Rhizoctonia solani; morphological and pathogenic variations; isolates. DOI: 10.3329/bjar.v35i3.6443Bangladesh J. Agril. Res. 35(3) : 375-380

scholarly journals Crabohydrate Utilization during the Sclerotium Formation of Rhizoctonia solani Kuehn AG-1(IA).

1996 ◽  
Vol 62 (1) ◽  
pp. 23-29
Author(s):  
Zen-ichi MOROMIZATO ◽  
Kosaku KOYAMADA ◽  
Masao TAMORI
Keyword(s):  
Rhizoctonia Solani ◽  
Sclerotium Formation

Critical phosphorus concentrations in potato plant parts at two growth stages

1997 ◽  
Vol 20 (4-5) ◽  
pp. 573-579 ◽  
Author(s):  
F. A. T. Rocha ◽  
P. C. R. Fontes ◽  
R. L. F. Fontes ◽  
F. P. Reis
Keyword(s):  
Potato Plant ◽  
Growth Stages ◽  
Plant Parts

Inhibition of Growth and Sclerotium Formation in Rhizoctonia solani by Garlic Oil

Mycologia ◽  
1980 ◽  
Vol 72 (5) ◽  
pp. 1022 ◽  
Author(s):  
H. B. Singh ◽  
U. P. Singh
Keyword(s):  
Rhizoctonia Solani ◽  
Garlic Oil ◽  
Inhibition Of Growth ◽  
Sclerotium Formation

Microorganisms Associated with Valencia Peanut Affected by Pod Rot in New Mexico

2012 ◽  
Vol 39 (2) ◽  
pp. 95-104 ◽  
Author(s):  
S. Sanogo ◽  
N. Puppala
Keyword(s):  
New Mexico ◽  
Rhizoctonia Solani ◽  
Sclerotium Rolfsii ◽  
Average Frequency ◽  
Controlled Environment ◽  
Soilborne Pathogens ◽  
Plant Parts ◽  
Etiological Study ◽  
Primary Focus ◽  
Insight Into

Abstract Pod rot of peanut is a disease that occurs worldwide. Soilborne pathogens typically causing pod rot include Rhizoctonia solani, Sclerotium rolfsii, and Pythium spp. Although pod rot is known to occur in New Mexico, no etiological study has been conducted on this disease. In 2005 and 2006, 14 Valencia peanut fields were surveyed in eastern New Mexico where the majority of Valencia peanut is produced. The primary focus of the study was to isolate and identify microorganisms associated with pod rot. The secondary focus of the study was to characterize microorganisms from roots and stems from the same plants selected for pod rot assessment. Peanut plants were collected and processed for isolation of microorganisms by plating seeds, pieces of hull, root, and stem on acidified potato dextrose agar. In both years, the average incidence of pods with hull discoloration or pod rot symptoms varied from 55–60 to over 90%, and disease severity ranged from 5 to over 90% across all fields surveyed. A diverse group of microorganisms representing more than 10 fungal and Oomycete genera were recovered from all plant part tissues, with R. solani as the most predominantly isolated mycelial microorganism. Rhizoctonia solani was found in all fields with average frequency of isolation from approximately 20 to 27% for pod tissue, 19 to 36% for root, and 20 to 27% for stem. In controlled-environment studies, all isolates of R. solani from different plant parts were shown to be pathogenic to Valencia peanut. This etiological study is the first in New Mexico to provide an insight into microorganisms associated with peanut affected by pod rot. Breeding Valencia peanuts for resistance to Rhizoctonia pod rot should be a priority.

Infectivity of Potato Spindle Tuber Viroid in Potato Plant Parts

1977 ◽  
Vol 77 (1) ◽  
pp. 15 ◽  
Author(s):  
R. P. Singh
Keyword(s):  
Potato Plant ◽  
Potato Spindle Tuber Viroid ◽  
Plant Parts

scholarly journals The Effects of Phosphorus and Magnesium on Sclerotium Formation in Rhizoctonia solani Kuehn.

1991 ◽  
Vol 57 (5) ◽  
pp. 649-656 ◽  
Author(s):  
Zenichi MOROMIZATO ◽  
Fumie ISHIZAKI ◽  
Konomi TAKARA ◽  
Masao TAMORI
Keyword(s):  
Rhizoctonia Solani ◽  
Sclerotium Formation

scholarly journals Evaluation of Chitinase Activity in Tall Fescue Cultivars Inoculated with Rhizoctonia solani

2015 ◽  
Vol 33 (4) ◽  
pp. 143-147
Author(s):  
Matthew Cutulle ◽  
Jeffrey Derr ◽  
David McCall ◽  
Adam Nichols ◽  
Brandon Horvath ◽  
...  
Keyword(s):  
United States ◽  
Rhizoctonia Solani ◽  
Tall Fescue ◽  
The United States ◽  
Chitinase Activity ◽  
The Other ◽  
Brown Patch ◽  
Great Utility ◽  
Before And After ◽  
Humidity Chamber

Tall fescue has great utility as a low maintenance turfgrass in the northern and transition zone regions of the United States. A factor limiting tall fescue utility is its susceptibility to the pathogen Rhizoctonia solani Kuhn, the causal agent of foliar brown patch. Chitinase activity has been positively correlated with resistance to R. solani in other plant species. A chitinase assay was developed for tall fescue. Three tall fescue cultivars with differing agronomic qualities and brown patch susceptibility as well as a resistant hybrid bluegrass cultivar were inoculated with R. solani in a greenhouse humidity chamber. Chitinase activity 48 hours after inoculation was negatively correlated with percent brown patch severity 10 days after inoculation. ‘Jaguar’ tall fescue was the most tolerant to R. solani and exhibited the highest chitinase activity before and after inoculation. No significant increase in chitinase activity was observed in the other tall fescue cultivars following R. solani inoculation. Identifying tall fescue cultivars expressing high amounts of chitinase activity could be important for developing brown patch-tolerant tall fescue cultivars.

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