ECOLOGICAL STUDIES ON TILE SYMBIOSIS OF TER ITOMYCES ...

and Penicilliun. Several Banidlomycetes will grow slowly In media
containing up to Oel gl-l.
(s) Ox bile
Ox bile has been used In many selective media* It supresses the
Crowth of saprophytic fungle It was used by Papavizas (1967) at 0.5
Cl-1 in a selective medium to isolate Fusarium,, and at higher concentra-
tions it also supresses, bacteria* Bakerspigel and Miller (1953) found
that agar containing 1% ox bile supressed bacterial colonies by one
fifth to one tenth* It restricts the growth of Penicilliumg Rhizorus
and Trichodermal as well as other spreading fungi.
(t) Para-phenylphenol (PPP)
(u) Pentachloronitrobenzene (PCN13)
rCJM is a narrow spectrum soil fungicide which inhibits rapidly
growing saprophytic fungig slowing the growth of Trichoderma'l and
oupposedly limiting that of Anperpillus
and Penicillivm* Kuhlman and
Hendrix (196") USOd it at 0919 gl-1 and found it prevented growth of
the Macorales and Greatly restricted the Growth of bacterias Singh
and tUtchell (1961) found PCNB Inhibited the growth of many soil fungi
such as j1hiKoctonia, Scleratinin and Sclerotium but not gythium,
PhXto]Lhthorq or]Fxisarium. Farley and Lockwood (1969) found fungal
numbers were reduced by 27-40% with concentrations of PCNU ranging
frOM OeOl-0-5 91-10
(v) Poptone
The use of peptone as a carbon and nitrogen source slows the
growth of fungi requiring carbohydrates for growth (ruhlMan wid Hendrix
1962). It was used here in place Of glucose In thebasic medium. It
was used by Russel (1956) In his selective Mcdlum for Isolating
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