Correlation between auto-dehelminthizing ability of the soil and occurrence of geohelminth eggs
Lýsek, H.; Vingrálková, J.
Acta Universitatis Palackianae Olomucensis Facultatis Medicae 111: 57-64
1985
ISSN/ISBN: 0301-2514 PMID: 2949533 Document Number: 242225
A correlation between the presence of geohelminth eggs and the occurrence of ovicidal fungi has been studied. The soil samples were taken from 70 localities in two districts on autumn and in spring. A total of 140 soil samples were collected and examined. Mean contamination by geohelminth eggs was 141 eggs in 1 kg of soil. In 111 soil samples the self-purifying (auto-dehelminthizing) capacity of the soil has been determined. In two cases the presence of ovicidal fungi in soil samples without any contamination by geohelminth eggs was found. This finding supports our previous report that the presence of ovicidal fungi is independent of actual contamination of a given locality. In soil samples where no ovicidal activity was determined geohelminth eggs amounted 149 in 1 kg of soil. On the other hand, in five soil samples where the ovicidal funguus could attacked 50 to 75% exposedeggs, 1 kg of soil contained 44 eggs on average. The authors isolated 15 strains of ovicidal fungi: Fusarium oxysporum (Schlecht), Fusarium solani (Mart.)Sacc, Gliocladium roseum Bainer, Mortierella elongata (Linnemann), Mortierella humilis (Lannemann), Mortierella ramanniana (Muller) Linnemann, Paecilomyces lilacinus (Thom) Samson, Paecilomyces marquandii (Masee) Hughes, Paecilomyces sp., Penicillium corylophylum (Dierck), Penicillium chrysogenum Thom, Penicillium sp., Verticillium cephalosporum (Gams), Verticillium lecani (Zimm.) Viegas.