VIEW ARTICLE

Vector Relations

Estimates in the Latent Period of Strawberry Crinkle Virus in the Aphid Chaetosiphon jacobi as a Function of the Experimental Design. W. M. Getz, Assistant biomathematician, Division of Biological Control and Department of Entomological Sciences, University of California, Berkeley 94720; E. S. Sylvester(2), and J. Richardson(3). (2)(3)Professor, and staff research associate, respectively, Division of Biological Control and Department of Entomological Sciences, University of California, Berkeley 94720. Phytopathology 72:1441-1444. Accepted for publication 12 April 1982. Copyright 1982 The American Phytopathological Society. DOI: 10.1094/Phyto-72-1441.

Two experimental treatment designs, undisturbed feeding versus serial transfer, were used to estimate the median latent period of the strawberry crinkle rhabdovirus in the aphid, Chaetosiphon jacobi, inoculated by injection with infectious insect extract. The serial transfer design resulted in a significantly (P<0.01) shorter latent period estimate than that obtained under conditions of undisturbed feeding (5.85 versus 8.24 days). The results support the hypothesis that inoculation of host plants by viruliferous aphids is more effective during active stylet penetration and salivary sheath formation than during feeding.