Thrips Flight and TSWV Risk Update–May 7, 2019

— Written By

Third generation thrips flights are now predicted to occur within 14 days at some of our locations, so growers should pay close attention to conditions in their area. Use the most recent information available to make management decisions, as the prediction accuracy will improve as we come closer to predicted thrips flight dates. The information presented here is intended to supplement, but not replace, farm-specific predictions. Read more about tobacco thrips biology and TSWV transmission.

The TSWV and Tobacco Thrips Risk Forecasting Tool was recently down due to server issues; however, the issue has since been resolved, and should be available for use.

Kenly is a relatively low TSWV risk site, situated within large acreage production areas in Johnston and Wilson Counties. As of today, TSWV infection risk in Kenly is slightly higher than last year. The third generation tobacco thrips flight (the generation that typically transmits the most TSWV) is not expected to occur during the next 14 days. 

Beulaville is a higher TSWV risk site in Duplin County. As of today, TSWV infection risk in Beulaville is slightly higher than last year. The third generation tobacco thrips flight (typically transmits the most TSWV) is expected to occur May 14. Growers near Beulaville who have not already transplanted and are transplanting 10 days or less before May 14 should consider using Actigard as a greenhouse float water treatment. Growers who have already transplanted tobacco should consider making a foliar application of Actigard 3 days before May 14.

Kinston is a moderate TSWV risk site in Lenoir County and also houses the N.C. Department of Agriculture & Consumer Services Cunningham Research Station where we conduct tobacco research. As of today, TSWV infection risk in Kinston is slightly higher than last year. The third generation tobacco thrips flight (typically transmits the most TSWV) is expected to occur May 16. Growers near Kinston who have not already transplanted and are transplanting 10 days or less before May 16 should consider using Actigard as a greenhouse float water treatment. Growers who have already transplanted tobacco should consider making a foliar application of Actigard 3 days before May 16.

New Bern is a higher TSWV risk site. As of today, TSWV infection risk in New Bern is similar to last year. The third generation tobacco thrips flight (typically transmits the most TSWV) is expected to occur May 11. Growers near New Bern who have not already transplanted and are transplanting 10 days or less before May 11 should consider using Actigard as a greenhouse float water treatment. Growers who have already transplanted tobacco should consider making a foliar application of Actigard 3 days before May 11.

Windsor is a higher TSWV risk site. As of today, TSWV infection risk in Windsor is similar to last year. The third generation tobacco thrips flight (typically transmits the most TSWV) is expected to occur May 21. Growers near Windsor who have not already transplanted and are transplanting 10 days or less before May 21 should consider using Actigard as a greenhouse float water treatment. Growers who have already transplanted tobacco should consider making a foliar application of Actigard 3 days before May 21.

Whiteville is a moderate TSWV risk site in Columbus County and also houses the NCDA&CS Border Belt Tobacco Research Station where we conduct tobacco research. As of today, TSWV infection risk in Whiteville is slightly higher than last year. The third generation tobacco thrips flight (typically transmits the most TSWV) is expected to occur May 11. Growers near Whiteville who have not already transplanted and are transplanting 10 days or less before May 11 should consider using Actigard as a greenhouse float water treatment. Growers who have already transplanted tobacco should consider making a foliar application of Actigard 3 days before May 11.

Carthage is a relatively low TSWV risk site in Moore County. As of today, TSWV infection risk in Carthage is similar to last year. The third generation tobacco thrips flight is not expected to occur during the next 14 days.

In order to get the most accurate risk assessment, we recommend you enter your own farm data into the TSWV and Tobacco Thrips Risk Forecasting Tool. The following information is needed:

  1. Field location (address, coordinates, nearest ZIP code, or selected from a map)
  2. TSWV infection percentage in a typical year at this location

In addition, you can provide the following optional information which will improve recommendations:

  1. Anticipated planting date
  2. Greenhouse applications of imidacloprid and/or Actigard

More Information Tobacco thrips – Tobacco Growers Information