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research article

Resistance to sun blotch virus in seed source trees of Duke avocado

authors

R. M. Burns
R. J. Drake, University of California
J. M. Wallace, University of California
G. A. Zentmyer, University of California

publication information

California Agriculture 23(8):7-8. DOI: 10.3733/ca.v023n08p7. August 1969.

author affiliations

R. M. Burns is Farm Advisor, Ventura County; R. J. Drake is Laboratory Technician Department of Plant Pathology, University of California, Riverside. J. M. Wallace is Professor Department of Plant Pathology, University of California, Riverside. G. A. Zentmyer is Professor and Chairman Department of Plant Pathology, University of California, Riverside.

abstract

Of 12 Duke avocado trees tested, 10 were found to be free of sun blotch virus infection. However, two trees without sun blotch symptoms were infected and apparently both are symptomless carriers. These transmit the virus through seeds to their seedling progeny and can cause infection of the scion tops that are worked on them when used as rootstocks. These studies demonstrate that it is necessary to test all Duke seed-source trees before using them as rootstock parents.


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