Abstract
In seed germination tests some isolates ofBacillus spp. showed antagonistic effects againstPythium aphanidermatum andRhizoctonia solani. In thoroughly infected soil, cucumber seeds reached a 40–60% rate of germination in the presence of the best antagonists. Protection to bean seeds was less effective; the germination rate was hardly better than 30%. The efficiency of antagonism reached by several isolates ofBacillus spp. appears to depend on their capacity to compete with other microorganisms or to produce antibiotic substances.
Zusammenfassung
Es konntenBacillus-Isolate gefunden werden, die sich in Keimungsversuchen an Samen als antagonistisch gegenüberPythium aphanidermatum undRhizoctonia solani erwiesen. Die Versuche wurden mit Bohnen- und Gurkensamen durchgeführt. Die wirksamsten Antagonisten konnten in infizierter Erde Auflaufraten bei Gurken von 40–60% erzielen.
Die Wirksamkeit der Antagonisten an Bohnen war niedriger, hier lagen die Keimraten kaum höher als 30%. Offenbar hängt die Wirksamkeit derBacillus-Antagonisten von der Fähigkeit ab Antibiotika zu produzieren und in Konkurrenz zu anderen Mikroorganismen zu treten.
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Wölk, M., Sarkar, S. Antagonismusin vivo vonBacillus spp. gegenüberRhizoctonia solani undPythium spp.. Anz. Schadlingskde., Pflanzenschutz, Umweltschutz 67, 1–5 (1994). https://doi.org/10.1007/BF01906560
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DOI: https://doi.org/10.1007/BF01906560