Record ID No. |
870 |
Author(s) |
Kiewnick,S , 2006 |
Affiliation |
Institute for Plant Diseases, Phytopathology and Nematology in Soil Ecosystems, University of Bonn, Nussallee 9, D-53115 Bonn, Germany. |
Title |
Multitrophic interactions of Paecilomyces lilacinus strain 251 in the rhizosphere of host and non-host plants |
Source. Vol.(no):Page |
Bulletin-OILB/SROP. 29(2), 53-61p. |
Categories |
Mycorrhiza General |
Subjects |
General |
Host |
Plants |
Organism |
Paecilomyces lilacinus, Meloidogyne incognita |
Country |
Germany, Europe |
Abstracts |
To better understand the multitrophic interaction of PL251 (commercial strain of Paecilomyces lilacinus) in the rhizosphere, dose-response experiments were conducted to evaluate the relationships between the antagonist dose, biocontrol efficacy and fungal persistence. The importance of host- or non-host plants, nematodes, mutualistic fungal endophytes and mycorrhiza for biological efficacy and unwanted side effects caused by the application of the biocontrol fungus was also investigated. The results demonstrated that persistence and consequently the biocontrol efficacy of PL251 was not, unlike other nematophagous fungi, linked to the presence of the target nematode nor the host plant. Furthermore, some nematode host plants seem to provide unsuitable conditions in their rhizosphere resulting in the rapid decline of fungal density and, in some cases, reduced efficacy of the antagonist. In contrast to other nematophagous fungi, rhizosphere competence is not a key factor for the biocontrol efficacy of PL251. Multiple applications did increase the persistence of the fungus in soil which was correlated with excellent control of root-knot nematodes (Meloidogyne incognita) under field conditions. |