Antagonism and mechanism of action of Trichoderma aureoviride against  Pythium aphanidermatum causing turfgrass root rot

Abstract

Abstract: In agar culture, Trichoderma aureoviride inhibited the growth of Pythium aphanidermatum, the cause of turfgrass root rots. It covered the P. aphanidermatum colony and produced large numbers of conidia. The effective concentration was at 4.65×10⁶ cfu/mL, and the inhibitory effect reached 53.56%. Comparing the inhibition effect of T. aureoviride suspension with that of three kinds of fungicides, T. aureoviride at a concentration of 10⁷ cfu/mL had the same effect as 25% metalaxyl with inhibition rates of 77.37% and 79.57%, respectively. Microscopic observation showed that T. aureoviride either entwined the hyphae of P. aphanidermatum or grew parallel with them, then penetrated and parasitized them. The main antagonistic mechanism of T. aureoviride against P. aphanidermatum was hyperparasitism.

CLC Number:

GU Li-jun, XU Bing-liang, LIANG Qiao-lan, LI Rong-feng. Antagonism and mechanism of action of Trichoderma aureoviride against Pythium aphanidermatum causing turfgrass root rot[J]. Acta Prataculturae Sinica, 2011, 20(2): 46-51.

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Antagonism and mechanism of action of Trichoderma aureoviride against Pythium aphanidermatum causing turfgrass root rot

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