Soil fungi

The primary use for methyl bromide is in the extermination of insect and rodent pests. Methyl bromide is used in space and stmctural fumigation except in California. The material is suitable for the fumigation of food commodities such as dried fmits, grain, flour, and nuts, and the faciHties in which these foods are processed or stored, as weU as for tobacco and many kinds of nursery stock. The usual dosage is 2—4 kg/28 m for 12—24 h. In soil fumigation methyl bromide controls weed seeds, nematodes, wireworms, and soil fungi. The usual dosage is 0.5—1 kg/9 m for 24 h at 16°C and above (82). 

An example of a separation primarily based on polar interactions using silica gel as the stationary phase is shown in figure 10. The macro-cyclic tricothecane derivatives are secondary metabolites of the soil fungi Myrothecium Verrucaia. They exhibit antibiotic, antifungal and cytostatic activity and, consequently, their analysis is of interest to the pharmaceutical industry. The column used was 25 cm long, 4.6 mm in diameter and packed with silica gel particles 5 p in diameter which should give approximately 25,000 theoretical plates if operated at the optimum velocity. The flow rate was 1.5 ml/min, and as the retention time of the last peak was about 40 minutes, the retention volume of the last peak would be about 60 ml. 

Penicillium expansum—which are widely distributed soil fungi and may have entered the lake from run-off—were capable of bringing about association of tetrachloroguaiacol with organic components in the aqueous phase, so that this material could subsequently enter the sediment phase (van Leeuwen et al. 1997). 

Launen L, L Pinto, C Wiebe, E Kiehlmann, M Moore (1995) The oxidation of pyrene and benzo(a)pyrene by nonbasidiomycete soil fungi. Can J Microbiol 41 477-488. 

Richardson, L.T. 1970. Effects of atrazine on growth response of soil fungi. Canad. Jour. Plant Sci. 50 594-596. 

KEYWORDS Mercury concentration, forest soil, fungi, fruiting bodies, moss... 

Fungal polysaccharides, 20 455, 577-578 Fungi. See also Soil fungi alkaloids in, 2 75... 

Soil fungi, in dew-retting, 77 605-606 Soil heaping defined, 3 758t Soil heaps... 

Biological In an in vitro study, the soil fungi Fusarium oxysponim and Paecilomyces varioti degraded pendimethalin to W(l-ethylpropyl)-3,4-dimethyl-2-nitrobenzene-l,6-diamine and 3,4-di-methyl-2,6-dinitroaniline. The latter compound was the only metabolite identified by another soil fungus namely, Rhizoctonia bataticola (Singh and Kulshrestha, 1991). 

Jones, A.S. Metabolism of aldicarb by five soil fungi, / Agric. Food Chem., 24(1) 115-117, 1976. 

Elmholt, S. and A. Kj oiler (1989). Comparison of the Occurrence of the Saprophytic Soil Fungi in Two Differently Cultivated Field Soils. Biological Agriculture and Horticulture 6 229-239. 

Griffin, D.M. Ecology of Soil Fungi Syracuse University Press Syracuse, 1972. 

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