EVALUATION OF SOME PEANUT CULTIVARS FOR THE SUSCEPTIBILITY OF INFECTION BY DAMPING —OFF, ROOT AND POD ROT DISEASES AND OCCURRENCE OF AFLATOXIGENIC FUNGI

Mahmoud,, E. Y.; Draz, Eetmad E.I.; AboIEIa, M. F.

doi:10.21608/jpp.2006.236416

EVALUATION OF SOME PEANUT CULTIVARS FOR THE SUSCEPTIBILITY OF INFECTION BY DAMPING —OFF, ROOT AND POD ROT DISEASES AND OCCURRENCE OF AFLATOXIGENIC FUNGI

Document Type : Original Article

Authors

¹ Plant Pathology Res. lnst, Agric. Res. Center, Giza, Egypt

² Central laboratory for Food and Feed, Agric. Res. Center, Giza, Egypt

10.21608/jpp.2006.236416

Abstract

Under greenhouse and field conditions all peanut cvs. tested varied ¡n their

susceptibility to infection by damping - off, and peanut root rots, Ismaflia I and R 92

cvs. were the most resistant against infection by damping -off, and peanut root rot

diseases and gave the highest percentage of survived plants, while Giza 5, Giza 4

and Gorgia cvs. were the highly susceptible cultivars to infection by dampingoff and

peanut root rot. Varietal reaction showed that pod rot diseases were common on al

cultivars and the nine cultivars tested differed greatly in their reaction to the diseases,

also no one of these cvs. showed completely resistance to aflatoxin production and

¡nvasion with aflatoxšgenic fungi. Aspergillus flavus was more invasive than

Aspergillus parasiticus and often dominated in peanut seeds than shells. Giza 4,

Gorgia and Giza 5 cvs. were the highest susceptible one to pod rot diseases and

recorded at the same time the highest frequency of aflatoxigenic fungi and content of

aflatoxin. While. R 92 and Ismailia I cvs. appeared high resistance in this respect.