Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 26

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The purpose of the investigations was to determine the acute toxicity of some plant protection products for earthworms. The methodical bases of the studies were OECD Guideline No 207 and Good Laboratory Practice (GLP). The test species was Eisenia fetida (Sav.). The tested preparations were introduced into artificial soil in concentrations of 62.5; 125, 250, 500 and 1000 mg·kg⁻¹ dry matter of soil. The test duration was 14 days. The animals were weighed following that time and alive animals were counted and observed. Taking into account the obtained results, the values of toxicity of pesticides: LC₀ (the highest concentration of the test substance causing no mortality of a population of earthworms under the conditions of the test), LC₅₀ (the concentration of the test substance that is expected to results in mortality of 50% of a population of earthworms under the conditions of the test) and LC₁₀₀ (the lowest concentration of the test substance causing 100% of mortality of a population of earthworms under the conditions of the test), were determined. It was found that influence of tested plant protection products on earthworms was diversified.
As a result of the mycological analysis of vervein seeds, 17 fungi species were identified. They included typical saprobiotic ones, namely Aspergillus, Penicillium, Rhizopus, Trichothecium and pathogens such as Altenaria, Botrytis, Fusarium, Rhizoctonia. Fungi frome the genera Altenaria, Fusarium and Botrytis cinerea constituted the highest proportion. In in vitro study the following fungi were the most pathogenic towards vervein seedlings: A. alternata, F. oxysporum, F. culmorum, B. cinerea and R. solani. The results showed that in vitro conditions the growth and development of A. alternata and F. oxysporum were most effectively inhibited by Zaprawa Funaben T and Captan suspension, whereas Topsin M was much less effective and in the case of fungus A. alternata it even stimulated the development of mycelium.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 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.