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Rate of Loss of Infectivity of Maize Dwarf Mosaic Virus by Schizaphis graminum Rondani After Different Acquisition Access Periods
Author(s) -
Berger P. H.,
Harris K. F.,
Toler R. W.
Publication year - 1989
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1989.tb01078.x
Subject(s) - biology , alate , infectivity , transmission (telecommunications) , virus , homoptera , aphididae , botany , virology , pest analysis , electrical engineering , engineering
The rate of loss of infectivity for greenbugs, Schizaphis graminum Rondani, carrying maize dwarf mosaic virus (MDMV) was similar for adult apterae and alates regardless of the acquisition access period (AAP) given. The rate was rapid during the first 2 h post‐acquisition and then decreased. Weighted least squares linear regression of log % transmission were plotted against retention‐time intervals to obtain regression slopes for each of the AAP groups tested (1, 3, 17, and 30 min). There were no significant differences among the regression slopes using F‐test comparisons. In serial transmission trials, transmission frequencies among aphids allowed 1‐min or 30‐min timed acquisition probes followed by 30‐see or 1‐min timed inoculation probes were not significantly different when statistical tests that quantify categorical data were applied. This suggests little difference in the amount of virus obtained by these groups of aphids. Transmission and retention data are discussed in relation to the two principal theories of the mechanism of non‐persistent virus transmission by aphids. Transmission of MDMV by the greenbug by a two mechanism process (stylet‐borne and ingestion‐egestion) is not confirmed.