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Steps for identifying TSWV in marigolds

Added on 17 June 2024

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Steps for identifying TSWV in marigolds
'Moonsong Deep Orange' African marigolds

A recent e-Gro alert from Brian E. Whipker and Patrick Veazie looked at a recent crop of marigolds that displayed typical symptoms of a virus infection. With other agents being possible explanations, here’s how growers can properly identify the tomato spotted wilt virus (TSWV) as the origin of infection. 

Common symptoms displayed on the crop of marigolds were: 

  • Leaf distortion 
  • Leaf mottling 
  • White ringspots 

While fitting into the categorization of TSWV, these symptoms also correlate with other plant viruses, so how was the true cause narrowed down? 

Continue reading.

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