Thrips Flight and TSWV Risk Assessment Report – May 30, 2018

— Written By Hannah Burrack
en Español / em Português
Español

El inglés es el idioma de control de esta página. En la medida en que haya algún conflicto entre la traducción al inglés y la traducción, el inglés prevalece.

Al hacer clic en el enlace de traducción se activa un servicio de traducción gratuito para convertir la página al español. Al igual que con cualquier traducción por Internet, la conversión no es sensible al contexto y puede que no traduzca el texto en su significado original. NC State Extension no garantiza la exactitud del texto traducido. Por favor, tenga en cuenta que algunas aplicaciones y/o servicios pueden no funcionar como se espera cuando se traducen.


Português

Inglês é o idioma de controle desta página. Na medida que haja algum conflito entre o texto original em Inglês e a tradução, o Inglês prevalece.

Ao clicar no link de tradução, um serviço gratuito de tradução será ativado para converter a página para o Português. Como em qualquer tradução pela internet, a conversão não é sensivel ao contexto e pode não ocorrer a tradução para o significado orginal. O serviço de Extensão da Carolina do Norte (NC State Extension) não garante a exatidão do texto traduzido. Por favor, observe que algumas funções ou serviços podem não funcionar como esperado após a tradução.


English

English is the controlling language of this page. To the extent there is any conflict between the English text and the translation, English controls.

Clicking on the translation link activates a free translation service to convert the page to Spanish. As with any Internet translation, the conversion is not context-sensitive and may not translate the text to its original meaning. NC State Extension does not guarantee the accuracy of the translated text. Please note that some applications and/or services may not function as expected when translated.

Collapse ▲

This is the sixteenth thrips flight and TSWV risk assessment report. Read about why we are posting these reports and more in our first reportRead more about tobacco thrips biology and TSWV transmission.

We have received localized reports of significant TSWV infection in fields in southern NC. Reports at some other locations are similar to previous years, and we’re watching how they develop with interest. The conditions we experience last growing season had the potential to result in higher carryover this year, but our cold winter and wet spring had the potential to reduce risk. The next several weeks will tell us which had the biggest effect.

We’ll continue to post reports through the predicted fourth generation flights, as this may be relevant for some growers who transplanted tobacco later. Once thrips flight have begun, no additional preventative treatments can be made.

Growers are reminded to use the most recent information available to make management decisionsPredictions are most accurate closer to predicted thrips flight dates. The information presented here is intended to supplement, but not replace, farm-specific predictions.

One of our extension agents pointed out that ZIP codes were not generating reports at some locations. If an address or ZIP code produces an error message at the Tobacco Thrips and TSWV Risk Forecasting Tool, please use the map to select your location instead. Using the map has not produced error messages.

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 about the same as in a typical year. Last year the third generation thrips flight occurred on May 10. This year, the third generation tobacco thrips flight (the generation that typically transmits the most TSWV) was expected to begin on May 23Because TSWV infection is predicted to be similar to a typical year and Kenly is a lower risk location, additional treatments against TSWV are not recommended for this location.The fourth generation thrips flight, which can also contribute to some TSWV transmission is predicted to occur on June 11. Tobacco plants transplanted more than 5 weeks prior to June 11 are at lower risk of TSWV infection and likely do not require additional treatment. Growers who are interested in making additional treatments against TSWV should consult their local extension agent for recommendations or contact Hannah.

Beulaville is a higher TSWV risk site in Duplin County. As of today, TSWV infection risk in Beulaville is lower than in a typical year. The third generation tobacco thrips flight typically transmits the most TSWV. Last year the third generation thrips flight occurred on May 4. This year, the third generation tobacco thrips flight (the generation that typically transmits the most TSWV) occurred on May 18Treatments effective at reducing TSWV infection in tobacco must be applied before predicted thrips flights, so additional treatments against TSWV are not recommended for this location. The fourth generation thrips flight, which can also contribute to some TSWV transmission is predicted to occur on June 4. Tobacco plants transplanted more than 5 weeks prior to June 4 are at lower risk of TSWV infection and likely do not require additional treatment. Growers who are interested in making additional treatments against TSWV in later transplanted tobacco should consult their local extension agent for recommendations or contact Hannah.

Kinston is a moderate TSWV risk site in Lenior County and also houses the NCDA & CS Cunningham Research Station where we conduct tobacco research. As of today, TSWV infection risk in Kinston is slightly lower than in a typical year. Last year the third generation thrips flight occurred on May 5. This year, the third generation tobacco thrips flight (the generation that typically transmits the most TSWV) began on May 20Treatments effective at reducing TSWV infection in tobacco must be applied before predicted thrips flights, so additional treatments against TSWV are not recommended for this location. The fourth generation thrips flight, which can also contribute to some TSWV transmission is predicted to occur on June 6. Tobacco plants transplanted more than 5 weeks prior to June 6 are at lower risk of TSWV infection and likely do not require additional treatment. Growers who are interested in making additional treatments against TSWV in later transplanted tobacco should consult their local extension agent for recommendations or contact Hannah.

New Bern is a higher TSWV risk site. As of today, TSWV infection risk in New Bern is lower than in a typical year. Last year the third generation thrips flight occurred on May 5. This year, the third generation tobacco thrips flight (the generation that typically transmits the most TSWV) began on May 19Treatments effective at reducing TSWV infection in tobacco must be applied before predicted thrips flights, so additional treatments against TSWV are not recommended for this location at this time. The fourth generation thrips flight, which can also contribute to some TSWV transmission is predicted to occur on June 6. Tobacco plants transplanted more than 5 weeks prior to June 6 are at lower risk of TSWV infection and likely do not require additional treatment. Growers who are interested in making additional treatments against TSWV in later transplanted tobacco should consult their local extension agent for recommendations or contact Hannah.

Windsor is a moderate TSWV risk site. As of today, TSWV infection risk in Windsor is about the same as in a typical year. Last year the third generation thrips flight occurred on May 19. This year, the third generation tobacco thrips flight (the generation that typically transmits the most TSWV) was expected to begin yesterday, May 27Because treatments effective against TSWV are preventative, no additional treatments are recommended at this point. The fourth generation thrips flight, which can also contribute to some TSWV transmission is predicted to occur on June 14. Tobacco plants transplanted more than 5 weeks prior to June 14 are at lower risk of TSWV infection and likely do not require additional treatment. Growers who are interested in making additional treatments against TSWV in later transplanted tobacco should consult their local extension agent for recommendations or contact Hannah.

Whiteville is a higher 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 about the same as in a typical year. Last year the third generation thrips flight occurred on May 2This year, the third generation tobacco thrips flight (the generation that typically transmits the most TSWV) began May 12. Treatments effective at reducing TSWV infection in tobacco must be applied before predicted thrips flights, so additional treatments against TSWV are not recommended for this location at this time. The fourth generation thrips flight, which can also contribute to some TSWV transmission was predicted to occur on May 30. Treatments effective at reducing TSWV infection in tobacco must be applied before predicted thrips flights, so additional treatments against TSWV are not recommended for this location at this time.

Clinton is a higher TSWV risk site in Sampson County. As of today, TSWV infection risk in Clinton is slightly less than in a typical year. Last year the third generation thrips flight occurred on May 3This year, the third generation tobacco thrips flight (the generation that typically transmits the most TSWV) began May 16. Treatments effective at reducing TSWV infection in tobacco must be applied before predicted thrips flights, so additional treatments against TSWV are not recommended for this location at this time. The fourth generation thrips flight, which can also contribute to some TSWV transmission is predicted to occur on June 3. Tobacco plants transplanted more than 5 weeks prior to June 3 are at lower risk of TSWV infection and likely do not require additional treatment. Growers who are interested in making additional treatments against TSWV in later transplanted tobacco should consult their local extension agent for recommendations or contact Hannah.

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:

3. Anticipated planting date

4. Greenhouse applications of imidacloprid and/or Actigard

More Information

Tobacco thrips – Tobacco Growers Information