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Author J.G. Elphlnstone |
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Refine your searchBrown rot outbreaks in Europe and measures taken to control the causal pathogen, Pseudomonas solanacearum / J.G. Elphlnstone
in Integrated management of bacterial wilt of potato: lesson from the hill of Nepal: proceedings of a national workshop / Pradhanang, P.M.
Title : Brown rot outbreaks in Europe and measures taken to control the causal pathogen, Pseudomonas solanacearum Material Type: printed text Authors: J.G. Elphlnstone ; , Publisher: Pokhara : Lumle Agriculture Research Centre Publication Date: 1996 Pagination: 10-25 .p Keywords: Potatoes; Wilts; Plant diseases Abstract: The importance of biovar 2 of Pseudomonas solanacearum (syn. Burkholderia solanacearum ; syn. Ralstonia solanacearum) in cool temperate climates has been recently emphasised by outbreaks of potato brown rot disease in some European countries. Dissemination of the pathogen in latently infected potato tubers and in contaminated irrigation water and overwintering in aquatic roots of the weed host Solanum dulcamara have been implicated. Evidence from the literature suggests that in cool climates the organism is unlikely to persist long term in soil in the absence of a susceptible host. Effective control strategies rely on the enforcement of quarantine legislation at both national and European Community levels. This requires knowledge of the biology of the pathogen in cool environments, methods for accurate monitoring of its survival and distribution at and around disease outbreak sites and application of effective measures for pathogen exclusion, containment and eventual eradication. This paper reviews current knowledge on the above.
Link for e-copy: http://elibrary.narc.gov.np/?r=445 Brown rot outbreaks in Europe and measures taken to control the causal pathogen, Pseudomonas solanacearum [printed text] / J.G. Elphlnstone ; , . - Pokhara : Lumle Agriculture Research Centre, 1996 . - 10-25 .p.
in Integrated management of bacterial wilt of potato: lesson from the hill of Nepal: proceedings of a national workshop / Pradhanang, P.M.
Keywords: Potatoes; Wilts; Plant diseases Abstract: The importance of biovar 2 of Pseudomonas solanacearum (syn. Burkholderia solanacearum ; syn. Ralstonia solanacearum) in cool temperate climates has been recently emphasised by outbreaks of potato brown rot disease in some European countries. Dissemination of the pathogen in latently infected potato tubers and in contaminated irrigation water and overwintering in aquatic roots of the weed host Solanum dulcamara have been implicated. Evidence from the literature suggests that in cool climates the organism is unlikely to persist long term in soil in the absence of a susceptible host. Effective control strategies rely on the enforcement of quarantine legislation at both national and European Community levels. This requires knowledge of the biology of the pathogen in cool environments, methods for accurate monitoring of its survival and distribution at and around disease outbreak sites and application of effective measures for pathogen exclusion, containment and eventual eradication. This paper reviews current knowledge on the above.
Link for e-copy: http://elibrary.narc.gov.np/?r=445 E-copies
http://nkcs.org.np/narc/dl/?r=445URL
in Integrated management of bacterial wilt of potato: lesson from the hill of Nepal: proceedings of a national workshop / Pradhanang, P.M.
Title : ldentification of weed and crop hostsof Pseudomonas solanacearum race 3 in the hills of Nepal Material Type: printed text Authors: Pradhanang, P.M. ; J.G. Elphlnstone, Author Publisher: Pokhara : Lumle Agriculture Research Centre Publication Date: 1996 Pagination: 39-49 .p Keywords: Potatoes; Wilts; Plant diseases Abstract: Agricultural weed and rotational crop spp., common to the high hill potato produc ion areas in Nepal, were tested to determine their potential as hosts of race 3 of Pseudomonas solanacearum, the causal agent of bacterial wilt or brown rot of potato. Tests were conducted under screenhouse and glasshouse conditions in Nepal and the UK respectively and a survey was conducted in Nepal to explore the incidence of natural infection. Artificial inoculation was performed by drenching cut roots of potted seedlings with a suspension of a potato isolate of biovar 2 of the bacterium. Brassica juncea (mustard cv. Fine White), Portulaca oleraceae, Drymaria cordata and Cerastium glomeratum were susceptible to infection when artificially inoculated with the bacterium. Surface sterilised roots of these plants contained an estimated 1ct to 108 colony forming units (cfu) per g of fresh root. One of 12 mustard seedling developed typical wilt symptoms, whereas other infected spp. remained symptomless. In C. glomeratum, infection tend .to localise in roots two months after inoculation whereas, it spread systemically into the stems of the other infected spp. Systemic root infection was also detected in Solanum xanthophyllum after one month but not after two months. Other spp., such as Polygonum capitata and Galinsoga paNiflora, although not infected systemically maintained high rhizosphere populations of the pathogen. Whereas P. so/anacearum declined to an undetectable level in unplanted soil within one month of inoculation, the bacterium could be recovered from the rhizosphere of all test plants for up to two months. Under natural conditions in bacterial wilt affected potato fields, infected plants of G. paNiflora, G. ciliata and P. capitata were identified although the frequency of infection was often low.
Link for e-copy: http://elibrary.narc.gov.np/?r=453 ldentification of weed and crop hostsof Pseudomonas solanacearum race 3 in the hills of Nepal [printed text] / Pradhanang, P.M. ; J.G. Elphlnstone, Author . - Pokhara : Lumle Agriculture Research Centre, 1996 . - 39-49 .p.
in Integrated management of bacterial wilt of potato: lesson from the hill of Nepal: proceedings of a national workshop / Pradhanang, P.M.
Keywords: Potatoes; Wilts; Plant diseases Abstract: Agricultural weed and rotational crop spp., common to the high hill potato produc ion areas in Nepal, were tested to determine their potential as hosts of race 3 of Pseudomonas solanacearum, the causal agent of bacterial wilt or brown rot of potato. Tests were conducted under screenhouse and glasshouse conditions in Nepal and the UK respectively and a survey was conducted in Nepal to explore the incidence of natural infection. Artificial inoculation was performed by drenching cut roots of potted seedlings with a suspension of a potato isolate of biovar 2 of the bacterium. Brassica juncea (mustard cv. Fine White), Portulaca oleraceae, Drymaria cordata and Cerastium glomeratum were susceptible to infection when artificially inoculated with the bacterium. Surface sterilised roots of these plants contained an estimated 1ct to 108 colony forming units (cfu) per g of fresh root. One of 12 mustard seedling developed typical wilt symptoms, whereas other infected spp. remained symptomless. In C. glomeratum, infection tend .to localise in roots two months after inoculation whereas, it spread systemically into the stems of the other infected spp. Systemic root infection was also detected in Solanum xanthophyllum after one month but not after two months. Other spp., such as Polygonum capitata and Galinsoga paNiflora, although not infected systemically maintained high rhizosphere populations of the pathogen. Whereas P. so/anacearum declined to an undetectable level in unplanted soil within one month of inoculation, the bacterium could be recovered from the rhizosphere of all test plants for up to two months. Under natural conditions in bacterial wilt affected potato fields, infected plants of G. paNiflora, G. ciliata and P. capitata were identified although the frequency of infection was often low.
Link for e-copy: http://elibrary.narc.gov.np/?r=453 E-copies
http://nkcs.org.np/narc/dl/?r=453URL
