In vitro Antagonistic Mechanisms of Trichoderma spp. and Talaromyces flavus to Control Gaeumannomyces graminis var. tritici the Causal Agent of Wheat Take-all Disease

Authors

  • Seddighe Mohammadi Department of Plant Protection, Shiraz Islamic Azad University, Shiraz Branch, Shiraz
  • Leila Ghanbari Department of Plant Protection, Shiraz Islamic Azad University, Shiraz Branch, Shiraz,

DOI:

https://doi.org/10.24925/turjaf.v3i8.629-634.271

Keywords:

Colonization, Direct coincidence, Dual culture, Volatile compounds, Non-volatile compounds

Abstract

Wheat take-all disease caused by Gaeumannomyces graminis var. tritici has recently been detected in different regions of Iran. With respect to biocontrol effect of Trichoderma spp. on many pathogenic fungi, seven isolates of Trichoderma and four isolates of Talaromyces were in vitro evaluated in terms of their biological control against the disease causal agent. In dual culture test the five isolates showed efficient competition for colonization against pathogenic fungus and the highest percentages of inhibition belonging to Talaromyces flavus 60 and Talaromyces flavus 136 were 59.52 and 57.61%, respectively. Microscopic investigations showed that in regions where antagonistic isolates and Gaeumannomyces graminis var. tritici coincide, hyphal contact, penetration and fragmentation of Gaeumannomyces graminis var. tritici were observed. Investigating the effect of volatile and non-volatile compounds at 10 ml concentration showed that the highest inhibition percentage on mycelium growth of the pathogen caused by T. harzianum (44.76%) and T. longibrachiatum (52.38%) respectively.

Author Biography

Seddighe Mohammadi, Department of Plant Protection, Shiraz Islamic Azad University, Shiraz Branch, Shiraz

Department of Plant Protection

Downloads

Published

29.07.2015

How to Cite

Mohammadi, S., & Ghanbari, L. (2015). In vitro Antagonistic Mechanisms of Trichoderma spp. and Talaromyces flavus to Control Gaeumannomyces graminis var. tritici the Causal Agent of Wheat Take-all Disease. Turkish Journal of Agriculture - Food Science and Technology, 3(8), 629–634. https://doi.org/10.24925/turjaf.v3i8.629-634.271

Issue

Section

Agriculture and Environment