Jan Pennings, the Netherlands


February 21, 2010

Categories: Diseases and Pests, Nematode, Virus

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Dear Friends,
Last week we had a demonstration day at our Research Institute, PPO Lisse,  www.ppo,wur.nl There was for me an interested item. They had new indications about spreading of Virus.  Via a vector living in the soil. From a research station in Norway (Bioforsk) they got the information that they isolated TVX virus without growing any tulip in their area.,TVX virus is becoming a big problem in Tulips,  That means; 1)  That bringing over virus by nematodes or fungis is possible. 2) Their must be an alternative hostplant for TVX without symptooms, 3) Because the symtooms of Pseudo-augusta are the same as aggressive TVX symtooms. Possible  pseudo-Augusta disease caused TVX. (other virusus? )
A long time ago,we had an education course by scientist about all kind of diseases in the bulbindustry. An older grower stand up and said;  I think that virus also bringing over in the soil. Impossible the scientists said.  I think the grower was right. I had the same experience,a long time ago when we were allowed to use Temik (nematode killer) I had very good results by using temik ,with growing tulips who were very easy infected by any virus,.
The scientist at the Research Station told me, all the indications we have now, we think that in the future this a greater problem will be than the green fly as vector for virus.
I hope that is also interested for you. I will follow this investigation  with much interest.  All the best from still a cold Holland.   Jan Pennings


One response to “Virus.”

  1. David Adams says:

    Thanks Jan for that most interesting comment on virus. We see very few aphids in our daffodils and I have often wondered if slugs or earwigs could also be vectors for virus. We believe that the cutting knife can also be a problem so why not anything else that chews the plants.

    It makes absolute sense that underground beasties could be vectors. Are you also suggesting that the virus may be latent in the soil?

    David Adams