scholarly journals Impact of maize hormonal interactions on the performance of Spodoptera frugiperda in plants infected with Clavibacter michiganensis subsp. nebraskensis

2021 ◽  
Author(s):  
Karen F. Da Silva ◽  
Sydney E. Everhart ◽  
Joe Louis
Keyword(s):  
Spodoptera Frugiperda ◽  
Clavibacter Michiganensis ◽  
Clavibacter Michiganensis Subsp ◽  
Hormonal Interactions

Clavibacter michiganensis subsp. sepedonicus. [Distribution map].

2017 ◽  
Author(s):  
Keyword(s):  
Solanum Tuberosum ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Distribution Map ◽  
Clavibacter Michiganensis ◽  
Central Russia ◽  
Clavibacter Michiganensis Subsp ◽  
Northern Russia ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Clavibacter michiganensis subsp. sepedonicus (Spieckermann & Kotthoff) Dye & Kemp. Actinobacteria: Actinomycetales: Microbacteriaceae. Hosts: potato (Solanum tuberosum) and tomato (Solanum lycopersicum). Information is given on the geographical distribution in Europe (Austria, Belarus, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, Germany, Greece, Crete, Hungary, Latvia, Lithuania, Netherlands, Norway, Poland, Romania, Russia, Central Russia, Northern Russia, Siberia, Slovakia, Spain, Sweden, UK and Ukraine), Asia (China, Anhui, Gansu, Hebei, Heilongjiang, Henan, Jiangsu, Ningxia, Shaanxi, Yunnan, Zhejiang, Japan, Kazakhstan, Korea Democratic People's Republic, Korea Republic, Nepal, Pakistan, Taiwan, Turkey and Uzbekistan), North America (Canada, Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, Mexico, USA, Idaho, Kansas, North Dakota and Oregon) and South America (Bolivia).

Clavibacter michiganensis subsp. michiganensis strains virulence and genetic diversity. a first study in Argentina

2017 ◽  
Vol 149 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Eliana Wassermann ◽  
Marcela Susana Montecchia ◽  
Olga Susana Correa ◽  
Vega Damián ◽  
Ana María Romero
Keyword(s):  
Genetic Diversity ◽  
Clavibacter Michiganensis ◽  
Clavibacter Michiganensis Subsp

Attempts at Biological Control of Clavibacter michiganensis subsp. michiganensis On Rockwool-Grown Greenhouse Tomatoes

2008 ◽  
Vol 69 (1) ◽  
pp. 125-134 ◽  
Author(s):  
Czesław Ślusarski
Keyword(s):  
Biological Control ◽  
Biocontrol Agent ◽  
Root Zone ◽  
First Year ◽  
Bacterial Canker ◽  
Clavibacter Michiganensis ◽  
Tomato Plants ◽  
Clavibacter Michiganensis Subsp ◽  
Greenhouse Tomatoes ◽  
Bacterial Canker Of Tomato

Attempts at Biological Control ofClavibacter michiganensissubsp.michiganensisOn Rockwool-Grown Greenhouse TomatoesTwo greenhouse experiments were conducted in which tomato plants artificially inoculated withClavibacter michiganensissubsp.michiganensis(Cmm) were grown in an open rockwool system as spring and autumn crops. Two isolates of the rhizosphere bacteria,Pseudomonas fluorescensstrain PSR21,Pseudomonas reactansstrain GGS14, a commercial biocontrol agent Aqua Bac Plus (Bacillusspp.) and a proprietary disinfectant containing QAC+Chx, applied at weekly intervals, were evaluated for their efficiency in the suppression of the bacterial canker of tomato. All treatments tested revealed to be ineffective in controlling the disease. The introduction ofCmmbacteria into the fresh rockwool in the first year of its usage resulted in a 100% death of tomato plants, whereas following an artificial inoculation of two- and three-year-old rockwool slabs withCmmbacteria dead plants amounted to 70 and 58%, respectively. This indicates that in the re-used rockwool a natural microbial suppressiveness to bacterial canker of tomato might be developed in the root zone.

scholarly journals Teknik Inokulasi Buatan Clavibacter michiganensis subsp. sepedonicus, Penyebab Penyakit Busuk Cincin Bakteri, pada Tanaman Kentang (Solanum tuberosum L.)

Agrikultura ◽  
2016 ◽  
Vol 27 (2) ◽  
Author(s):  
Luciana Djaya ◽  
Ineu Sulastrini ◽  
Iin Rusita
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Clavibacter Michiganensis ◽  
Bacterial Ring Rot ◽  
Seed Tubers ◽  
Clavibacter Michiganensis Subsp ◽  
Ring Rot ◽  
Inoculation Techniques ◽  
Rot Disease

ABSTRACT Inoculation Techniques of Clavibacter michiganensis subsp. sepedonicus, the Cause of Bacterial Ring Rot Disease, on Potato (Solanum tuberosum L.). Clavibacter michiganensis subsp. sepedonicus, the cause of bacterial ring rot disease on potatoes, has been detected in potato fields in Pangalengan. To anticipate the spread of the pathogen, researches on the desease epidemiology are urgent to be carried out. Artificial inoculation techniques will be useful in the epidemiological studies. The objective of this reasearch was to evaluate some inoculation techniques, which are simple, cheap and fast in causing disease symptoms. The experiment was carried out at the laboratory and glasshouse of Balai Penelitian Tanaman Sayuran (Balitsa), Lembang. The experiment was arranged in the randomized block design with five treatments of inoculation technique and five replications. The treatments were (a) soaking wounded seed tubers in pathogen suspension, (b) soaking not wounded seed tubers in pathogen suspension, (c) pathogen suspension was injected into leaf axil, (d) pathogen suspension was injected into seed tubers, and (e) pathogen suspension was poured into the planting holes. The results showed that stabbing and soaking tubers in pathogen suspension caused the shortest incubation period (17 days after inoculation) and the highest disease incidence (60%). Keywords : Clavibacter michiganensis subsp. sepedonicus, Bacterial ring rot, Potatoes, Inoculation techniquesABSTRAKClavibacter michiganensis subsp. sepedonicus (Cms), penyebab penyakit busuk cincin bakteri pada tanaman kentang, telah terdeteksi keberadaannya pada pertanaman kentang di Pangalengan. Dalam upaya mencegah penyebaran penyakit busuk cincin bakteri di Indonesia, perlu adanya studi epidemiologi patogen tersebut. Pada penelitian epidemiologi akan diperlukan cara menginokulasi tanaman secara buatan. Tujuan dari penelitian ini adalah untuk mendapatkan teknik inokulasi buatan yang dapat menyebabkan periode inkubasi yang lebih singkat dan persentase kejadian penyakit busuk cincin bakteri paling tinggi pada tanaman kentang. Percobaan dilaksanakan di rumah kaca dan laboratorium penyakit Balai Penelitian Tanaman Sayuran (Balitsa), Lembang. Percobaan dirancang secara rancangan acak kelompok dengan lima perlakuan teknik inokulasi Cms dan lima ulangan, yaitu inokulasi dengan (a) merendam ubi benih yang telah dilukai dalam suspensi bakteri, (b) merendam ubi benih tanpa dilukai dalam suspensi bakteri, (c) suspensi bakteri ditusukkan pada ketiak daun tanaman kentang, (d) suspensi bakteri ditusukkan pada ubi benih, dan (e) suspensi bakteri disiramkan pada lubang tanam. Masing-masing ulangan terdiri dari lima tanaman. Hasil penelitian menunjukkan bahwa dari lima teknik inokulasi buatan yang dilakukan, inokulasi dengan melukai ubi benih dan merendamnya dalam suspensi patogen menghasilkanJurnal Agrikultura 2016, 27 (2): 66-71ISSN 0853-2885Teknik Inokulasi Buatan Clavibacter….67periode inkubasi tersingkat, yaitu 17 hari setelah inokulasi, dan persentase kejadian penyakit tertinggi yaitu sebesar 60%.Kata Kunci : Clavibacter michiganensis subsp. sepedonicus, Busuk cincin bakteri, Kentang, Inokulasi buatan

scholarly journals First Record of Clavibacter michiganensis subsp. michiganensis Causing Canker of Tomato Plants in Syria

Plant Disease ◽  
2008 ◽  
Vol 92 (4) ◽  
pp. 649-649 ◽  
Author(s):  
R. Ftayeh ◽  
A. von Tiedemann ◽  
B. Koopmann ◽  
K. Rudolph ◽  
M. Abu-Ghorrah
Keyword(s):  
First Record ◽  
Bacterial Suspension ◽  
Bacterial Canker ◽  
Clavibacter Michiganensis ◽  
Fresh Market ◽  
Gram Positive ◽  
Tomato Plants ◽  
Clavibacter Michiganensis Subsp ◽  
Whole Plants ◽  
Bacterial Canker Of Tomato

Between March and mid April of 2007, several extensive surveys for Clavibacter michiganensis subsp. michiganensis were carried out among greenhouses in the coastal strip provinces of the Mediterranean Sea in north-west Syria (Latakia and Tartous), where a large proportion of Syrian fresh-market tomatoes are produced. This bacterium causes bacterial canker of tomato and is considered an A2 quarantine pathogen by the European Plant Protection Organization (EPPO). It is currently present in all major tomato-production areas in the EPPO region (4), but has not been previously reported in Syria. The survey revealed typical canker symptoms in 7% of 150 inspected greenhouses that contained cvs. Dima, Huda, and Astona. These symptoms included stunting, dark brown-to-black lesions on the leaf margins, wilting and defoliation of whole plants, and vascular discoloration. The disease incidence in such greenhouses was estimated at 15% at the time of the survey. Diseased plants were surface sterilized and homogenized in sterile water. Serial dilutions were plated on nutrient glucose agar. Suspected colonies were further purified by repeated restreaking on new agar plates. All 10 of the suspected strains obtained from different locations were identified as C. michiganensis subsp. michiganensis on the basis of the following observations: bacterial cells of all strains had a coryneform shape, were nonmotile, gram positive according to Gram's reaction test with 3% KOH (2), oxidase-negative, and caused hypersensitive reactions on leaves of Mirabilis jalaba (1) within 24 h. PCR assays were conducted with the C. michiganensis subsp. michiganensis-specific primer set PSA-4/R (3) and template DNA prepared from in-vitro-grown bacteria with the MasterPure Gram Positive DNA Purification Kit (Epicentre Biotechnologies, Madison, WI). The expected 270-bp amplicon was observed for both reference strains as well as the Syrian strains. Pathogenicity of the strains was confirmed by artificial inoculation of 6-week-old tomato plants (Lycopersicon esculentum Mill. cv. Lyconorma). Inoculation was performed by stabbing the stem with a sterile needle through a drop (~35 μl) of bacterial suspension (~108 CFU/ml in 0.01 M MgSO4) placed in the axil of the second or third true leaf. Three tomato seedlings were inoculated with each strain. Control plants were inoculated with sterile 0.01 M MgSO4. Symptoms including lateral wilt of leaflets, stem lesions, and wilting of whole plants were observed within 10 to 15 days after inoculation, except for the negative control. To fulfill Koch's postulates, reisolation and reidentification of the pathogen was conducted as previously described. To our knowledge, this is the first record of the occurrence of bacterial canker of tomato in Syria. References: (1) R. D. Gitaitis. Plant Dis. 74:58, 1990. (2) T. J. Gregersen. Appl. Microbiol. Biotechnol. 5:123, 1978. (3) K. H. Pastrik and F. A. Rainey. J. Phytopathol. 147:687, 1999. (4) I. M. Smith and L. M. F. Charles, eds. Map 253 in: Distribution Maps of Quarantine Pests for Europe. EPPO/CABI, 1998.

Symptomless infection with Clavibacter michiganensis subspecies sepedonicus during tissue culture propagation of potato

1992 ◽  
Vol 72 (3) ◽  
pp. 943-953 ◽  
Author(s):  
B. A. Schuld ◽  
M. D. Harrison ◽  
J. Crane
Keyword(s):  
Solanum Tuberosum L ◽  
Solanum Melongena ◽  
Shoot Cultures ◽  
Clavibacter Michiganensis ◽  
Bacterial Ring Rot ◽  
Inoculum Level ◽  
Clavibacter Michiganensis Subsp ◽  
Nodal Cuttings ◽  
Symptomless Infection ◽  
Culturing Conditions

Nodal cuttings of tissue cultured potato (Solarium tuberosum L. ’Sangre’) were inoculated with the bacterial ring rot (BRR) pathogen, Clavibacter michiganensis subsp. sepedonicus (Cms). Under commercial tissue culturing conditions, the pathogen persisted through as many as three micropropagation cycles, each consisting of production of a plantlet from an apical cutting. Infected plantlets did not develop BRR symptoms of leaf wilt or chlorosis. Signs of bacterial presence, cloudiness of tissue culturing medium or foliar lesions, were not present when the inoculum level was low, 5.0 × 102 cfu mL−1. A higher inoculum concentration (5.0 × 103 cfu mL−1) reduced plantlet height, but the lower concentration had no effect on height. Growth and viability of tissue from Cms-inoculated plantlets grown on Murashige and Skoog’s medium without sucrose, a source of carbon, were reduced compared to those grown with sucrose, but BRR symptoms were not induced at these inoculum levels. When transplanted to soilless potting medium, a basal portion of cycle 1 plantlets either died or produced a symptomatic miniplant, indicating that Cms survived during the growth of a plantlet into a miniplant. Nonsymptomatic miniplants were produced by portions of some cycle 2 and 3 Cms-infected plantlets, indicating that successive nodal propagation decreased the number of symptomatic miniplants. Bioassays of these nonsymptomatic miniplants were Cms-negative. Incubating plantlet tissue in Richardson broth for 14 d and visually observing for turbidity was not effective in detecting Cms in cultured potato tissue. Because phytopathogenic bacteria may persist in tissue cultures without causing symptoms, pathogen-specific testing of source plants and plant cultures is necessary to prevent transmission of bacteria to cultured stock and field-grown progeny.Key words: Potato shoot cultures, Solanum tuberosum L., Clavibacter michiganensis subsp. sepedonicus, medium with no carbon, bacterial persistence and detection, symptomless infection, Solanum melongena L.

Clavibacter michiganensis subsp. sepedonicus. [Distribution map].

2006 ◽  
Author(s):  
Keyword(s):  
New York ◽  
Czech Republic ◽  
Solanum Tuberosum ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Distribution Map ◽  
Clavibacter Michiganensis ◽  
Clavibacter Michiganensis Subsp ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Clavibacter michiganensis subsp. sepedonicus (Spieckermann & Kotthoff) Dye & Kemp. Bacteria. Host: Potato (Solanum tuberosum). Information is given on the geographical distribution in Europe (Austria, Belarus, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece (Crete), Latvia, Lithuania, Netherlands, Norway, Poland, Romania, Russia (European Russia, Siberia), Slovakia, Spain, Sweden, UK, Ukraine), Asia (China (Anhui, Hebei, Heilongjiang, Henan, Jiangsu, Ningxia, Shaanxi, Yunnan, Zhejiang), Japan, Kazakhstan, Korea Democratic People's Republic, Korea Republic, Nepal, Taiwan, Uzbekistan), Africa (Algeria), and North America (Canada (Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan), USA (Colorado, Idaho, Kansas, Maine, New York, North Dakota, Oregon, Washington, Wisconsin)).

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