VIEW ARTICLE

Vector Relations

Aphid Transmission of Maize Dwarf Mosaic Virus Strains. P. Thongmeearkom, Graduate Student, Department of Plant Pathology, University of Illinois, Urbana 61801; R. E. Ford(2), and H. Jedlinski(3). (2)Professor and Head, Department of Plant Pathology, University of Illinois, Urbana 61801; (3)Research Plant Pathologist, North Central Region, Agricultural Research Service, U. S. Department of Agriculture. Phytopathology 66:332-335. Accepted for publication 2 September 1975. DOI: 10.1094/Phyto-66-332.

Rhopalosiphum maidis, R. padi, and Myzus persicae acquired maize dwarf mosaic virus (MDMV)-A and MDMV-B after probes of less than 30, 10, and 30 seconds, respectively, Rhopalosiphum maidis, R. padi, and M. persicae retained MDMV-A at least 90, 120, and 240 minutes, respectively; and MDMV-B at least 30, 90, and 30 minutes, respectively. The rates of loss of ability to transmit MDMV-A and MDMV-B were the same for all aphid-virus combinations studied. The efficiency of MDMV-A transmission by aphids from corn to corn, corn to Johnsongrass, and Johnsongrass to corn did not differ significantly, indicating that both plants were equally effective as virus sources. Strain MDMV-A was retained longer (at least 90, 120, and 240 minutes by R. maidis, R. padi, and M. persicae, respectively) than was MDMV-B (at least 30, 90, and 30 minutes by R. maidis, R. padi, and M. persicae, respectively), after a 10-minute acquisition access on diseased corn leaves. Strain MDMV-B was not transmitted to Johnsongrass by the aphids tested.