High Incidence of Tobacco Streak Virus in Tobacco and Its Transmission byMicrocephalothrips abdominalisand Pollen fromAgeratum houstonianum

Natural host range, thrips and seed transmission of distinctTobacco streak virusstrains in Queensland, Australia

“…Ageratum has been shown to be a natural host of TSV in India (Prasada Rao et al, 2003) and was also indicated as a critical host of AgLV and thrips vectors that caused disease in tobacco crops in southeast Australia (Greber et al, 1991). We did not detect AgLV from any samples from central Queensland, and ageratum is rarely recorded in this region.…”

“…They produce large amounts of pollen and can sustain high thrips populations. These include sunflower and parthenium in India (Prasada Rao et al, 2003), Ambrosia polystachia in Brazil (Almeida & Corso, 1991) and Ageratum houstonianum in Australia (Greber et al, 1991).…”

Alfalfa mosaic virus and ilarviruses: involvement of coat protein in multiple steps of the replication cycle.

“…A major difference separating the two genera is their mode of transmission in the field. AMV can be transmitted by aphids and by seed (Bol, 1999) ; in addition to transmission by seed, ilarviruses can be transmitted in association with thrips (Sdoodee & Teakle, 1987 ;Greber et al, 1991Greber et al, a, b, 1992. Morphological differences between the bacilliform alfamoviruses and spheroidal ilarviruses may be a minor criterion to keep the two genera separate as spheroidal particles are present in AMV preparations and bacilliform particles can be found in preparations of several ilarviruses.…”

The most northern record of the alien composite thrips Microcephalothrips abdominalis in Europe - short communication

“…by prof. Heming 2016), especially glasshouses, with an ability to transmit economically important viruses (Trdan 2002) such as tobacco streak virus (TSV) from ageratum houstonianum Mill. (Asteraceae) to tobacco or cucumber during feeding (Greber et al 1991) across open farmland.…”

“…Geographic distribution of Microcephalothrips abdominalis (Crawford 1910) has been generally reviewed by Pizzol et al (2012) as secondarily quite cosmopolitan, mainly tropical and subtropical, including Australia (Greber et al 1991), Brazil (Cavalleri et al 2006), Canada (Chiasson 1986), China (Vierbergen et al 2006), India (Raizada 1968), Japan (Nakao 1999), Oceania (Mound & Walker 1982), South Africa (Zur Strassen 2006) or USA (Cook et al 2003;Hoddle et al 2004;Diffie et al 2008), in fact originally described from Central America (Crawford 1910). In Europe the records predominantly refer to warmer regions in Atlantic and Mediterranean countries, including Canary Islands (Zur Strassen 2003), Croatia (Vierbergen et al 2006), southern France (Pizzol et al 2012), Italy (Strapazzon 1999) and Slovenia (Trdan 2002) up to Hungary (Vierbergen et al 2006) (Figure 1).…”