Susceptibility of California Almond Cultivars to Aflatoxigenic Aspergillus flavus

in HortScience
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  • 1 Department of Pomology, University of Califomia, Davis, CA 95616
  • | 2 Department of Pomology, University of Califomia, Davis, CA 95616

Colonization and sporulation of aflatoxigenic Aspergillus flavus Link on intact and injured seed was evaluated for a selection of almond [Prunus dulcis (Mill.) D.A. Webb] cultivars. Barriers to fungal development were identified at the intact seedcoat and at the seed cotyledon tissue. The seedcoat barrier was expressed as a delay in fungal colonization for up to 3 days following the inoculation of intact seed. Seedcoat resistance was uniformly high for all cultivars tested. Cotyledon resistance, which was expressed as a lower rate of disease development was identified only in the cultivars Ne Plus Ultra, Ruby, and Carrion.

Contributor Notes

Current address: Dept. of Horticulture, Univ. of Michigan, East Lansing, MI 48824.
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