Investigations on the Biology of the Strawberry Aphid (Chaetosiphon Fragaefolii), the Most Important Vector of Strawberry Viruses in West Germany.

Aphid Species and Population Dynamics Associated with Strawberry

“…Chaetosiphon fragaefolii was a dominant species in study sites in the states of Rio Grande do Sul and Paraná as it has in the USA, Europe, South Africa, and Argentina (Krczal 1982, Rondon & Cantcliffe 2004, Cédola & Greco 2010. This pest is considered the major insect vector for viruses such as strawberry vein banding virus, strawberry mild yellow edge virus, strawberry crinkle virus, and strawberry mottle virus (Krczal 1982, Rondon & Cantcliffe 2004, Cédola & Greco 2010.…”

“…Large populations of these insects intensify sap sucking, favoring the development of sooty mold (Capnodium sp.) resulting in reduced photosynthesis, production, and fruit quality (Krczal 1982, Rondon et al 2005, Cédola & Greco 2010. Moreover, aphids are vector of viruses (Rondon & Cantcliffe 2004, Rondon et al 2005, Cédola & Greco 2010.…”

High Risk Strawberry Viruses by Region in the United States and Canada: Implications for Certification, Nurseries, and Fruit Production

“…It should be noted that strawberry samples collected from the Fraser River valley in northern Washington and British Columbia in this study and grafted onto Fragaria vesca indicators induced symptoms typical of SCV. SCV is a rhabdovirus that replicates in the aphid vector and has a latent period of at least 6 days under optimal cotiditions whereas, under less than optimal conditions, the latent period is increased to as much as 50 days (5). It has been speculated that SCV was not observed in northern areas where the strawberry aphid was plentiful due to an extended latent period, such that most aphids died before they were able to transmit the virus. "…”

Expanding Field of Strawberry Viruses Which Are Important in North America

“…Although the diseases associated with the two viruses were described in the 1930s and 1950s, respectively (Demaree and Marcus, 1951;Zeller and Vaughan, 1932), it was not until the 1970s and 1980s that the viruses were identified (Richardson et al, 1972;. Both are negative strand RNA viruses belonging to the family Rhabdoviridae and are transmitted in a persistent-replicative manner by Chaetosiphon species (Krczal, 1982). The mode of transmission indicates that the viruses not only infect plants but also their vectors.…”