Hugh,
I am pretty much of the same mind. I don't always get it done in time, but try to lay down a metalic copper spray(Kocide) prior to emergence to kill off anything that overwintered and might attack the new seedlings as they emerge. Even if I don't get it before they emerge, a little turquoize tint never hurt anybody 8)
I have always believed that the fungi we fight in our woodsgrown beds are the result of the pathogens being in the ground from the start. But, you are correct, in that the seed (if improperly handled) can certainly carry the fungi. I stopped using bleech on my rootlets a couple years back. I think there are times when the bleech actually kills the rootlets and they then start to decay, contaminating the rest of the lot. What I\"ve found though, is that nearly dry peat keeps the rootlets well, and seldom does it allow the spread of fungal disease. I might dig through and find a fuzzy rootlet, but those around it will be fine.
The same thing goes for seed. We have discovered that ginseng seed can be kept much drier than we had initially believed. For example, the seed I sold last year did not have a single grinner in the bunch. Yet, it was germination tested at 98%. I have kept about a half pound of stratified seed in an open plastic box in my basement over the winter at room temperature. I wet it now and again when I remember to do so. But, it gets VERY dry. I am keeping it not to plant, but to tinker with new seeder designs when I have the chance. I cut a few open the other day and found they look just like they did the day I got them last August. Not a grinner in the bunch and I found no dead or diseased seed. I suspect they just think it is still last fall. They still need another cold cycle to germinate. Likewise, I know that if you keep fresh seed in the freezer, then take them out a year later and warm them in the summer and plant them in the fall, they will come up like that years crop.
I know in Ontario, they spray Quadris as soon as they plant before laying straw. We can't use it here as its not labeled for Ginseng. But, I have used Bravo/Ridomil to help protect the seeds through the fall and into winter with seemingly ok results. If I ever get my time back, I\"ll have to set up experiments on stuff like this. It is an interesting issue for sure.
Billy,
I think that is a good logical way to experiment with your issue. I know from my experience that I have no issues with wild sim being left to its own divices even though it comes from commercially raised seed. When I dug up some 4-6s the other fall, I was very impressed with the way they looked. I sprayed them the first two years, and nothing after that. They looked as wild as any I've seen.
I'll also tell you, that when I take the time to hand pick seed from the stuff I have growning in the woods and stratify them myself, they do remarkibly well. Not only do the seed look huge and grin excessively, but the plants themselves look really robust. I think it has to do with the acclimation to the area. This is another reason I think fall planting does so much better than spring planting.
Please, both of you keep us informed!