Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 14

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  stem canker
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Mathematical modelling of life cycle and molecular detection of Leptosphaeria maculans and L. biglobosa species

100%
Dawidziuk A.
Phytopathologia
|
2011
|
tom 62
2

Epidemiology and damage caused by stem canker of oilseed rape in Poland

100%
Jedryczka M.
Phytopathologia Polonica
|
2007
|
tom 45
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Pseudothecial maturation and ascospore release of Leptosphaeria maculans and L. biglobosa in south-east Poland

100%
Dawidziuk A., Kasprzyk I., Kaczmarek J., Jedryczka M.
Acta Agrobotanica
|
2010
|
tom 63
|
nr 1
Stem canker of brassicas is a severe disease of oilseed rape in Australia, Canada and Europe, including Poland. The disease is caused by Leptosphaeria maculans and L. biglobosa - two pathogens belonging to the class Dothideomycetes. The species differ in pathogenicity, but they have identical shape and size of fruiting bodies and spores of the generative and vegetative stages. Both pathogens are often found together in infected tissues of oilseed rape plants. The main goal of the experiments was to measure the rate of pseudothecial maturation and to monitor ascospore concentration of L. maculans and L. biglobosa in air samples. The paper is the first investigation on the generative stage development of these two species in south-east Poland. The studies were done for three consecutive years (2005-2007), for six most important months in pathogen development and plant infection, including 3 months in the spring (March – May) and 3 months in the autumn (September – November). The stage of pseudothecial maturation was assessed visually, based on the development of asci and ascospores. Monitoring of spore concentration in the air was performed using a Hirst-type 7-day volumetric trap. It was proved that differences in pseudothecial maturation rate in south-east Poland, encompassing the climatic regions of the Carpathian Foothills and Cracow, do not exceed two weeks within one season. The first and the highest ascospore concentration dates depended on weather conditions in a particular season. The total number of spores during the studied seasons varied from 9 to12 spores/m3, which was from 70 to 90 times lower than the average from five other monitoring sites around Poland. The short exposition to spore showers and very small concentrations of L. maculans and L. biglobosa ascospores in air samples were the most probable reasons for relatively small damage of oilseed rape crops by stem canker in the south-east part of Poland.
4

Ecology and control of light leaf spot [Pyrenopeziza brassicae Sutton et Rawlinson] and stem canker [Leptosphaeria maculans Desm.Ces et de Not.] of oilseed rape

100%
Karolewski Z.
Phytopathologia Polonica
|
1999
|
tom 17
5

Properties of Phoma lingam [Tode ex Fr.] Desm. isolates from Poland. II. Secondary metabolites production

100%
Kachlicki P., Jedryczka M.
Phytopathologia Polonica
|
1994
|
tom 07
6

Properties of Phoma lingam [Tode ex Fr.] Desm. isolates from Poland. I. Pathogenicity characterization

100%
Jedryczka M., Lewartowska E., Frencel I.
Phytopathologia Polonica
|
1994
|
tom 07
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Characterization of two coexisting pathogen populations of Leptosphaeria spp., the cause of stem canker of brassicas

80%
Kaczmarek J., Jedryczka M.
Acta Agrobotanica
|
2011
|
tom 64
|
nr 2
Stem canker of brassicas, also known as blackleg is the most damaging disease of many Brassicaceae. The disease is caused by Leptosphaeria maculans (Desm.) Ces et de Not. and L. biglobosa sp. nov., Shoemaker & Brun, which coexist in plants and resulting in disease symptoms and decreased yield, quantity and quality of cultivated vegetables and oilseed rape. The paper presents taxonomic relationships between these coexisting pathogen species, describes particular stages of their life cycles, summarizes the differences between the species, and reviews methods for their identification.
8

Changes in total phenolics, ferulic and cinnamic acids content and PAL activity in seedlings of winter oilseed rape in oculated with Phoma lingam picnospores

80%
Hura K., Hura T.
Acta Physiologiae Plantarum
|
2007
|
tom 29
|
nr 1 Suppl.
9

The effect of adjuvants, spray volume and nozzle type on azoxystrobin efficacy against Leptosphaeria maculans and L. biglobosa on winter oilseed rape

80%
Ratajkiewicz H., Kierzek R., Karolewski Z., Wachowiak M.
Journal of Plant Protection Research
|
2009
|
tom 49
|
nr 4
440-445
In two vegetative seasons 2005-2006 azoxystrobin (Amistar 250 SC at the dose of 0.7 dm3/ha) was applied as a spraying treatment at the beginning of plant flowering against stem canker (Leptosphaeria maculans and L. biglobosa) in winter oilseed rape crops. The effect of the following spray application parameters: water volume (200 and 400 l/ha), adjuvant type (Break Thru S 240 - 0.1% and Atpolan 80 EC - 0.5%), and nozzle type (XR11002 - fine droplet size and DB11002 - coarse droplets at 0.4 MPa pressure) on the fungicide efficacy was studied. The results of presented studies indicated that azoxystrobin (Amistar 250 SC) caused a significant decrease of rape infection by stem canker. Addition of adjuvants did not significantly increase the fungicide effectiveness, and sometimes lowered its action (especially after the application of Atpolan 80 EC). The applied spray volumes of water and nozzle type provided an effective protection of oilseed rape against stem canker, however, in some cases the results of field experiments were not significantly different. The best results of the disease casual agent (L. biglobosa) control, statistically proved were shown at the higher spray volume (400 l/ha), regardless of nozzle type (droplet size) and adjuvant application.
10

Polymorphism of ten new minisatellite markers in subpopulations of phytopathogenic fungus Leptosphaeria maculans differing with metconazole treatment

80%
Jedryczka M., Irzykowski W., Jajor E., Korbas M.
Journal of Plant Protection Research
|
2010
|
tom 50
|
nr 1
103-109
Stem canker of brassicas is one of the most damaging diseases of oilseed rape worldwide. The disease is caused by two related Leptosphaeria species, and L. maculans is regarded as the more damaging one. Being an ascomycete, the pathogen is able to quickly create new variants that can overcome new resistance genes introduced by researchers and breeding companies. The aim of this work was to study polymorphism of L. maculans populations using 10 recently developed minisatellite markers. The studied subpopulations differed with metconazole treatment. Seven minisatellite markers showed polymorphisms and formed alleles varying from 2 to 10 different core motifs, with 5 alleles on average. In total 36 alleles were found. The majority of alleles (72%) were found in both studied subpopulations of L. maculans. There were 28 alleles in the group of L. maculans isolates originating from plants not treated with any fungicide and 32 in the subpopulation treated with metconazole. Ten unique alleles and imbalanced ratios between some alleles contributed to differences between L. maculans subpopulations. The minisatellites MinLm555, MinLm935-2, MinLm939, MinLm1139 and MinLm2451 showed 6 new variants as compared to the isolates described so far.
11

The maturation rate of the generative stage of Leptosphaeria maculans and Leptosphaeria biglobosa in central and eastern Poland

80%
Dawidziuk A., Podlesna A., Kaczmarek J., Jedryczka M.
Polish Journal of Agronomy
|
2010
|
nr 02
12

The occurrence of Alternaria blight [Alternaria ssp.] and Phoma stem canker [Phoma lingam] on oilseed rape in central Lithuania and pathogenic fungi on harvested seed

80%
Brazauskiene I., Petraitiene E.
Journal of Plant Protection Research
|
2006
|
tom 46
|
nr 3
295-311
Field surveys were performed in winter and spring rape crops of agricultural companies and individual farmers during the period of 2001–2003. A questionnaire was completed for each experimental field, giving a description of the crop. The incidence and severity of fungal diseases were estimated annually in 14–18 winter and spring rape crops. Seed samples were taken from each field and composition fungal communities on harvested seed was estimated. Alternaria blight and Phoma stem canker were present on stems of all investigated winter and spring rape cultivars and Alternaria blight occurred on siliques in all experimental years. In 2001, most favourable year for spread of diseases, Alternaria blight damaged 87.2 100% of winter rape and 100% of spring rape siliques, maximum disease severity was 6.66 and 7.24%, respectively. All cultivars of winter and spring rape were susceptible to Alternaria blight. Phoma stem canker was more often found on stems of spring oilseed rape – up to 98% of stems with symptoms of Phoma stem canker. Seed fungal infection level was 10.0–100% in winter rape and 16.0–93.6% in spring rape seed samples. The most frequent fungi on seeds of winter and spring oilseed rape were Alternaria spp. and Cladosporium spp.
13

Evaluation of resistance of Polish oilseed winter rape cultivars to stem canker and sclerotinia stem rot

80%
Jedryczka M., Lewartowska E., Frencel I., Drobnik M.
Plant Breeding and Seed Science
|
1996
|
tom 40
|
nr 1-2
14

Comparison of the efficiency of breeding methods of Brassica napus L. resistant to Phoma lingam [Tode ex Fr.] Desm

70%
Starzycki M., Starzycka E., Pszczola J., Pakos T.
Plant Breeding and Seed Science
|
1996
|
tom 40
|
nr 1-2
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.