Laboratory studies with the lettuce root aphid, Pemphigus bursarius (L.), and lettuce mosaic virus showed that three forms of the aphid tested were able to transmit the virus. P. bursarius was less efficient in transmitting the virus than Myzus persicae (Sulzer). The apterous root forms of P. bursarius transmitted the virus with less efficiency from foliage to foliage than they did from root to root. Sap inoculation tests using a local lesion host, Gomphrena globosa L., as an indicator, showed that less virus was present in the roots of lettuce mosaic virus infected plants than in the foliage. Transmission efficiency by the apterous viviparae did not significantly increase following a pre-access fast, but the aphids transmitted after a shorter access time. The fundatrigeniae of P. bursarius from poplar and the alienicolae from lettuce were also rather inefficient vectors of lettuce mosaic virus. However, the fundatrigeniae were superior vectors when compared with the alienicolae. A comparison of incubation periods of the virus in the plants when the virus was transmitted from foliage to foliage and from root to root showed mean incubation periods of about 7 days with foliage to foliage transmission and 15.5 days with root to root transmission.
Document Type: Research Article
Publication date: October 1, 1962
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Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.