Effect of Temperature and Moisture on Parasitization ofHeterodera schachtiiEggs byAcremonium strictumandFusarium oxysporum
- 1 January 1980
- journal article
- research article
- Published by Scientific Societies in Phytopathology®
- Vol. 70 (9) , 889-891
- https://doi.org/10.1094/phyto-70-889
Abstract
Parasitization of H. schachtii eggs by A. strictum and F. oxysporum occurred after 200 degree-days growth of the nematode at 24.degree. C and increased with time to 58 and 46% by A. strictum and F. oxysporum, respectively. Parasitic activity of A. strictum was greater at 24.degree. C than at 28.degree. C, that of F. oxysporum was similar at 24 and 28.degree. C and little parasitism was expressed by either fungus at 20 and 32.degree. C. A. strictum was parasitic when soil moisture was near saturation, but not when it was held near wilting point levels. The reverse was true for F. oxysporum.Keywords
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