Re: Cypripedium - virus confirmed


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Abgeschickt von Darcy Gunnlaugson am 09 Mai, 2000 um 23:24:40

Antwort auf: Re: Cypripedium - virus confirmed von Peter Corkhill am 05 Mai, 2000 um 21:45:35:

Hi Peter;

I hope someone there takes you up on the offer to try to save this plant. Quaratine often works in such cases, and plants will develope immunity themselves over time. For example a Trillium grandiflorum infected with the dreaded *mycoplasma*, when isolated here, overcame it in a matter of 2 years and now shows no signs of it all. Similarly, masses of Pacific Dogwood Trees which was infested in coastal BC with a viral infection a few years back, and which people were cutting and burning, have now recovered and appear absolutely healthy and uneffected (those not cut and burned). It seems that plants which are vigourous, will overcome the problem and weak ones will succumb. Insuring that the vector or agent of the disease is contrilled is the largest problem with nursery plants. As viral infections are usually spred through cuts or wounds, it is most likely that it carried by chewing or sucking insects, and control of the appropriate species will in all likelhood, stop the spred. Without spredding further, the only thing one need do is wait and see if the plant developes resistance and overcomes the problem. I would still isolate it from others for a few years for good measure. The end result will in all likelihood be a virus resistant clone.

*mycoplasma* infected plants were once sold in the trillium trade as desireable and were deliberately infected by large nurseryhouses for this desired (white striped green) effect. It was later discovered that they infected other trillium when imported into gardens, and the practise of breding this way has ceased. However, as noted, some overcome the disease and are now normal disease resistant plants.

Best

Darcy


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