Re: Heat treatment for foliar nematodes

Bev, sounds like you are at the mercy of mother nature regarding when you can 
get your hosta out of the ground.  I have a plant that I too want to try the 
hot water treatment on.  Last fall, I potted it up and it is spending the 
winter in the garage (occasionally watered).  Thawing should be done slowly, 
so I am waiting for some of those warm days we seem to always get in 
February.  I would then move it to the coolest part of my basement for a day 
or so before washing off the dirt and "cooking".

My question regarding this process, is say a person has a multi-division 
plant.  The bigger the mass, the less likely the critters in the middle will 
die, so do you have to divide into single divisions before heating?  

I was disappointed none of the knowledgeable people on these Robins responded 
to your original request for help.  Foliar Nematodes is a serious problem.  
Several of the local societies have donated large sums of money which the AHS 
is using to fund Foliar Nematode research.  Surely there are people who can 
add educated input to this topic.    
Ray Rodgers, Bartonville, IL, CIHS, Zone 5
In a message dated 02/04/2000 6:43:56 PM Central Standard Time, 
BSteg46464@aol.com writes:

<< I have a small clump of 'Eventide' that looked like it may have had foliar 
 nematode symptoms late last fall.  At the Winter Scientific meeting it was 
 reported that the hot water treatment for this appears to be very effective. 
 
 At the AHS website it tells how to "cook" the plant, and says it is usually 
 done in February, about a month before emergence. (That is more than a month 
 before emergence in NW Indiana, where I live).  However, if I wanted to do 
 this, I am assuming the plant must first be thawed out. How this would be 
 done - remove all soil, or thaw soil and all slowly, wait until the ground 
 thaws to dig the clump, or what? 
 Thanks,
 Bev Stegeman >>


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