Wilt and Root Rot Complex of Important Pulse Crops: Their Detection and Integrated Management

2020 ◽  
pp. 93-119 ◽  
Author(s):  
Nidhi Kumari ◽  
Shabnam Katoch
Keyword(s):  
Root Rot ◽  
Integrated Management ◽  
Pulse Crops

Identification of metalaxyl and ethaboxam insensitive Pythium sylvaticum pathogenic to pulse crops in Montana, USA.

2021 ◽  
Author(s):  
Lipi Parikh ◽  
Swarnalatha Moparthi ◽  
Frankie Crutcher ◽  
Mary Burrows
Keyword(s):  
Root Rot ◽  
Damping Off ◽  
Management Options ◽  
Fungicide Sensitivity ◽  
Root Rots ◽  
Pulse Crops ◽  
Pythium Root Rot ◽  
Pythium Sylvaticum ◽  
Potential Pathogenicity

Pythium root rot and damping-off caused by Pythium spp. are important diseases of pulse crops. In a 2016 pathogen survey from dry pea growing fields in Montana, along with commonly known causal agents P. ultimum and P. irregulare, an isolate identified as P. sylvaticum (LPPY17) was isolated from the rhizosphere of a diseased pea plant collected from Valley County, MT. Root rots and damping-off caused by P. sylvaticum have not previously been reported for chickpea, pea, and lentil crops. The isolate LPPY17 was tested for fungicide resistance in vitro, and results indicated a reduced sensitivity to metalaxyl and ethaboxam containing fungicides. LPPY17 was also tested for pathogenicity on chickpea, pea, and lentil seedlings in the greenhouse, and the results from the study revealed LPPY17 is capable of causing both root rots and damping off. Due to the potential pathogenicity and reduced fungicide sensitivity of this species, in the future it will be important to monitor for P. sylvaticum in pulse root rot surveys and diagnostics, as management options may be different from other common Pythium spp.

Distribution and Integrated Management of Root Rot of Pea in Malakand Division

1998 ◽  
Vol 1 (4) ◽  
pp. 267-270 ◽  
Author(s):  
Jahangir Khan ◽  
Mumtaz Khan ◽  
Muhammad Amin
Keyword(s):  
Root Rot ◽  
Integrated Management

scholarly journals Susceptibility of Garden Trees and Shrubs to Armillaria Root Rot

Plant Disease ◽  
2020 ◽  
Vol 104 (2) ◽  
pp. 483-492
Author(s):  
Matthew G. Cromey ◽  
Jassy Drakulic ◽  
Elizabeth J. Beal ◽  
Ian A. G. Waghorn ◽  
Joe N. Perry ◽  
...  
Keyword(s):  
Root Rot ◽  
Integrated Management ◽  
Opportunistic Pathogen ◽  
High Index ◽  
Herbaceous Perennials ◽  
Specific Pcr ◽  
Armillaria Root Rot ◽  
Serious Disease ◽  
Species Specific ◽  
The University

Armillaria root rot (ARR) is a serious disease of woody plants caused by several species of Armillaria. Armillaria isolates from diagnostic samples received in 2017 were identified by genus- and species-specific PCR and compared with isolates from an earlier survey (2004 to 2007). The results were comparable and, therefore, were combined for further analysis. Three species were identified: Armillaria mellea (83%), A. gallica (15%), and A. ostoyae (2%). Their wide host range makes choice of resistant plants in management of the disease difficult. We used the Royal Horticultural Society diagnostic dataset of ARR records from U.K. gardens to compare the susceptibility of different host genera to the disease. The dataset was compared with an earlier experiment at the University of California. An index-based approach was used to separate genera into three categories: 77 low-index (<0.99), 37 medium-index (0.99 to 1.76), and 56 high-index (>1.76) genera were recorded. All three species were associated with both angiosperms and gymnosperms; moreover, A. ostoyae did not show the host preference for gymnosperms that has been reported elsewhere. A. gallica was particularly common on herbaceous perennials and showed a trend to occur on resistant hosts that may be under other stress, supporting its description as an opportunistic pathogen. Four monocotyledons grown as trees or shrubs in U.K. gardens had a very low ARR index according to indices associated with A. mellea and A. ostoyae. Genera in the order Myrtales were almost always low index, while those in the Saxifragales and Fagales were mostly high index. These results provide confidence in the use of host resistance as part of the integrated management of ARR.

Integrated management of root rot and foot rot disease of durian

2017 ◽  
pp. 143-146 ◽  
Author(s):  
M. Chuebandit ◽  
S. Vorakuldumrongchai ◽  
W. Prasert
Keyword(s):  
Root Rot ◽  
Integrated Management ◽  
Foot Rot ◽  
Rot Disease

scholarly journals Resistance of Nineteen Major Caladium Commercial Cultivars to Pythium Root Rot

EDIS ◽  
1969 ◽  
Vol 2005 (3) ◽  
Author(s):  
Zhanao Deng ◽  
Brent K. Harbaugh ◽  
Richard O. Kelly ◽  
Teresa Seijo ◽  
Robert J. McGovern
Keyword(s):  
Root Rot ◽  
Integrated Management ◽  
Ornamental Plants ◽  
Control Measures ◽  
Publication Date ◽  
Aesthetic Value ◽  
Resistance Level ◽  
University Of Florida ◽  
Pythium Root Rot ◽  
Commercial Cultivars

Caladiums (Caladium xhortulanum) are popular ornamental plants widely grown for their bright colorful leaves. Pythium root rot, caused by P. myriotylum, is one of the few soil-borne diseases in caladium that can dramatically reduce plant growth, aesthetic value, and tuber yield. Identification and use of disease-resistant cultivars has proven to be an important and economically viable strategy for integrated management of major diseases in crops and for reducing the use of pesticides. This strategy will be particularly useful for caladiums in the landscape and home gardens, because in such cases choices of root rot control measures are limited. However, information on the resistance level of commercial caladium cultivars has been lacking. This document is ENH996, one of a series of the Environmental Horticulture Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date December 2, 2004.  ENH996/EP251: Resistance of Nineteen Major Caladium Commercial Cultivars to Pythium Root Rot (ufl.edu)

Fusarium spp. associated with root rot of pulse crops and their cross pathogenicity to cereal crops in Montana

Plant Disease ◽  
2020 ◽  
Author(s):  
Swarnalatha Moparthi ◽  
Mary Eileen Burrows ◽  
Josephine Mgbechi-Ezeri ◽  
Bright Agindotan
Keyword(s):  
Root Rot ◽  
Fusarium Species ◽  
Elongation Factor ◽  
Abundant Species ◽  
Cereal Crops ◽  
Fusarium Spp ◽  
Internal Transcribed Spacer Region ◽  
Translation Elongation ◽  
Pulse Crops ◽  
Disease Management Strategy

Root rot caused by Fusarium species is a major problem in the pulse growing regions of Montana. Fusarium isolates (n=112) were obtained from seeds and/or roots of chickpea, dry pea, and lentil. Isolates were identified by comparing the sequences of the internal transcribed spacer region and the translation elongation factor 1-α in Fusarium-ID database. Fusarium avenaceum was the most abundant species (28%), followed by F. acuminatum (21%), F. poae (13%), F. oxysporum (8%), F. culmorum (6%), F. redolens (6%), F. sporotrichioides (6%), F. solani (4%), F. graminearum (2%), F. torulosum (2%) and F. tricinctum (0.9%). The aggressiveness of a subset of 50 isolates that represent various sources of isolation was tested on three pulse crops and two cereal crops. Nonparametric analysis of variance conducted on ranks of disease severity indicated that F. avenaceum and F. solani isolates were highly aggressive on pea and chickpea. In lentil, F. avenaceum and F. culmorum were highly aggressive. In barley, F. avenaceum, F. solani, F. culmorum, and F. graminearum were highly aggressive. In wheat, F. avenaceum, F. graminearum, and F. culmorum were highly aggressive. Two F. avenaceum isolates were highly aggressive across all the crops tested and found to be cross pathogenic. One isolate of F. culmorum and an isolate of F. graminearum obtained from chickpea and lentil seed were highly aggressive on barley and wheat. The results indicate that multiple Fusarium spp. from seeds and roots can cause root rot on both pulse and cereal crops. Rotating these crops may still lead to an increase in inoculum levels, making crop rotation limited in efficacy as a disease management strategy.

Susceptibility of Garden Plants to Phytophthora Root Rot

Plant Disease ◽  
2020 ◽  
Author(s):  
Liz Beal ◽  
Ian Waghorn ◽  
Joe Perry ◽  
Gerard R G Clover ◽  
Matthew Cromey
Keyword(s):  
Host Range ◽  
Root Rot ◽  
Woody Plants ◽  
Integrated Management ◽  
Common Species ◽  
Phytophthora Species ◽  
High Index ◽  
Phytophthora Root Rot ◽  
Wide Host Range ◽  
Serious Disease

Phytophthora root rot (PRR) is a serious disease of horticultural, forest and ornamental plant species caused by species of the oomycete genus Phytophthora. Their wide host range makes choice of resistant plants in management of the disease difficult. We used the Royal Horticultural Society diagnostic dataset of PRR records from U.K. gardens to compare the susceptibility of different host genera to the disease. The dataset was compared with existing reports of plants recorded as notably resistant or notably susceptible to PRR. An index-based approach was used to separate 177 genera of woody plants into three categories: 85 were low-index (<0.10: rarely affected), 34 were medium-index (0.10 – 0.20: sometimes affected) and 58 were high-index (>0.20: frequently affected). Similarly, genera of non-woody plants were separated into: 45 low-index (<0.22), 16 medium-index (0.22 – 0.44) and 18 high-index (>0.44). Taxus was the genus with the highest index, while most genera in the Malvales and Ericales were in the high index group. Most genera in the Myrtales, Fabales and Monocotyledons were low index. Whilst 30 Phytophthora species were recorded in our study, the wide host range spp., P. plurivora, P. cryptogea and P. cinnamomi represented 63% of identifications. Phytophthora plurivora was the most common species on woody plants and P. cryptogea on non-woody plants. These results provide confidence in the use of host resistance as part of the integrated management of PRR.

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