Volume 12 Part 2 Article 83: Effect of Various Fungal Metabolites on Aphelenchoides composticola Franklin and Its Multiplication on Some Fungi

Volume 12 Part 2 Article 83
Year 1989
Title: Effect of Various Fungal Metabolites on Aphelenchoides composticola Franklin and Its Multiplication on Some Fungi
Authors: P.S. Grewal and H.S. Sohi

Abstract:

Aphelenchoides composticola is a serious pest of white button mushroom (Agaricus bisporus) especially where the bulk pasteurization facilities for the compost or casing are lacking with the potential growers (Grewal and Sohi, 1986). It causes 26-100 percent losses depending upon the initial nematode inoculum, nematode species involved and the time of entry into the mushroom tray (Arnold and Blake, 1968; Sharma et al., 1984 and Grewal, 1987). Due to the mefficacy of the contact nematicides and the health hazards involved in the use of systemic chemicals, some suitable alternative measures are sort for. In this connection various fungi have been reported to produce some chemicals in their cultural filtrates which are toxic to nematodes (Krizokova el al., 1976; Shukla and Swarup, 1971; Kurt, 1975; Mam, 1984). Besides, Sohi et al. (1986) indicated that incorporation of dried plant materials in the compost caused some specific mycofloral changes which may be responsible for the control of nematodes and thereby increasing the yields. They further observed that the colony forming units of the fungi like Arthrobotrys sp., Gliocladium deliquescens. Penicillium sp., Paecilomyces sp., Trichoderma viride and Trichothecium roseum were comparatively higher than the usual contaminants of the compost whose population is completely or partially eliminated. Keeping in view the above facts, a study was conducted to test the in vitro efficacy of some specific fungal metabolites on A. composticola and the role of various fungi as alternate hosts in carrying over the nematode infestations from generation to generation.

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