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

Znaleziono wyników: 5

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:  Seimatosporium hypericinum
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

Studies on the pathogenicity of Seimatosporium hypericinum [Ces.] Sutton for the leaves, stems and seeds of St.John's wort [Hypericum perforatum L.]

100%
Zimowska B.
Herba Polonica
|
2004
|
tom 50
|
nr 3-4
The paper is concerned with the pathogenicity of four isolates of Seimatosporium hypericinum towards the leaves, stems and seeds of St. John's wort (Hypericum perforatum L.). The conidial spores of the tested fungus isolates growing on a glucose-potato nutrient medium were used in inoculation of the seeds stratified at the temperature of 0°C and disinfected superficially. The infection suspension contained 10" conidia/1 ml of sterile distilled water. The leaves and stems were infected through the injured and non-injured epidermis. The infection material consisted of 3 mm rings of the mycelium from 14-day-old sporulating cultures of the examined isolates of S. hypericinum. Artificially infected and control seeds and leaves were kept in moisture chambers at temperatures of 27°C and 22°C, respectively. Inoculation of the stems of St. John's wort took place in a climatic chamber. Positive results of reisolation of S. hypericinum from the artificially infected leaves and stems showed a possibility of infecting those parts by the tested isolates of the fungus. On the other hand, it was not possible to reisolate the fungus cultures from the artificially infected seeds of St. John's wort.
2

Wplyw warunkow hodowli na wzrost, zarodnikowanie i tworzenie struktur morfologicznych przez Seimatosporium hypericinum [Ces.] Sutton

94%
Zimowska B.
Acta Agrobotanica
|
2002
|
tom 55
|
nr 1
401-410
The present study deals with effects of the air temperature, and the type of medium on the growth and form morfological structures of six Seimatosporium hypericinum isolates tested. St Jonh's Wort extract agar, St Jonh's Wort plant agar and PDA, oatmeal agar has been recognized as most useful for growth and sporulation of S. hypericinum. Mineral agar, appeared the least useful for growth and form acervuli and conidia. S. hypericinum can develop in a wide range of temperature, but the optimum one for the growth and sporulation of the fungus vary between 20°C and 28°C.
3

Possibilities of growth and development suppression of Seimatosporium hypericinum [Ces.] Sutton on artificial media and Hypericum perforatum L.

84%
Zimowska B.
Herba Polonica
|
2006
|
tom 52
|
nr 4
Biological activity of chitosan in the form of a microcrystalline gel and of a hydrogel, as well as the activity of grapefruit extract were evaluated in vitro by means of measuring the growth inhibition and formation of morphological structures of four isolates of Seimatospo- rium hypericinum, obtained from leaves and stems of St. John's wort (Hypericum perforatum). In addition, the effect of acybenzolar S-methyl was tested in climatic chamber conditions, when plants inoculated by S. hypericinum were protected. The studies carried out in vitro showed that both chitosan and grapefruit extract inhibited growth of pathogen colonies significantly. The studies confirmed the protective effect of chitosan, grapefruit extract and acybenzolar S-methyl in the case of St. John's wort plants inoculated by S. hypericinum. Chitosan and grapefruit extract proved to be the most effective when used preventively.
4

Impact of some fungicides on growth and development of morphological structures of Seimatosporium hypericinum [Ces.] Sutton in vitro

84%
Zimowska B.
Herba Polonica
|
2006
|
tom 52
|
nr 1-2
The object of the research work was an isolate of S. hypericinum D 1224, as well as ten fungicides belonging to different chemical groups. The studies on the toxic effect were conducted in vitro by means of poisoning the media with the use of 1, 10 and 100 μg a.i./cm3 of the tested preparations. The obtained results showed that the compounds of thiophanatemethyl and triadimephon caused complete inhibition of the growth of S. hypericinum, when the dose of 10 and 100 μg a.i./cm3 was used, while in the case of mancozeb the effective dose was 100μg a.i./cm3. These compounds, as well as trifloxystrobin, can be therefore regarded as a prospective means of limiting growth and development of S. hypericinum and protecting St. John’s wort from this pathogen. The effect of the other compounds on S. hypericinum was less toxic.
5

Biotic effect of phyllospheric fungi on the growth and development of Seimatosporium hypericinum (Ces.) Sutton

67%
Zimowska B.
Electronic Journal of Polish Agricultural Universities. Series: Horticulture
|
2004
|
tom 07
|
nr 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.