Using Indicator Plants to Detect Tospoviruses
INSV and TSWV have an extremely wide host range that overlaps with the host range of its primary and most efficient vector, WFT. INSV is more common among greenhouse ornamentals, whereas TSWV is more common among field and vegetable crops including tomatoes, peppers, peanuts and tobacco.
Significant losses have occurred among many greenhouse crops, including impatiens, New Guinea impatiens, cyclamen, begonia, primula, and gloxinia. Many herbaceous perennials are also susceptible to INSV including penstemon, campanula, phlox, aster and lupine, to name a few. Roses and poinsettias are the only major greenhouse crops not susceptible to INSV. Weeds found in and around greenhouses such as galinosoga and chickweed support thrips egg-laying and are common reservoirs of INSV.
How did INSV enter my greenhouse?
Thrips feeding and localized lesions on petunia indicator plant. (figure 2.)
Leanne Pundt, Extension Educator, University of Connecticut
Allen, W.R. and J. A. Matteoni. 1991. Petunia as an Indicator Plant for Use by Growers to Monitor for Thrips Carrying the Tomato Spotted Wilt Virus in Greenhouses. Plant Disease. 75: 78-82.
Casey, C. (Ed) 2000. Integrated Pest Management for Bedding Plants, New York State IPM Program, Cornell Cooperative Extension Pub. No. 407.
Daughtrey, M.L., R.K. Jones, J. W. Moyer, M.E. Daub, and J. Baker. 1997. Tospoviruses Strike the Greenhouse Industry. Plant Disease. 81(11):1220-1230. (Note: This is an excellent overview of tospoviruses with many color photographs. If you would like a copy, please contact Leanne Pundt. )
Pundt, L, J. Sanderson and M. Daughtrey. 1992. Petunias are your tip-off for TSWV. GrowerTalks. November 1992. 69-72.
Information on our site was developed for conditions in the Northeast. Use in other geographical areas may be inappropriate.
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