Just stumbled upon a free ebook site online and found:
Ginseng and Other Medicinal Plants by A. R. Harding
www.gutenberg.org/ebooks/34570
You might want to choose the HTML version - I did and it is fairly easy to browse and included images.
I included a interesting cut from it below...
TNhunter
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This disease threatens seriously to handicap us in the raising of Ginseng, says a writer in \"Special Crops.\" It does down, but is giving us trouble all over the country. No section seems to be immune from it, tho all seem to be spraying more or less. I know of several good growers whose gardens have gone down during the last season and this, and they state that they began early and sprayed late, but to no decided benefit. What are we to do? Some claim to have perfect success with spraying as their supposed prevention.
Three years ago I began to reason on this subject and in my rambles in the woods, I have watched carefully for this disease, as well as others on the wild plant, and while I have now and then noted a wild plant that was not entirely healthy, I have never seen any evidence of blight or other real serious disease. The wild plant usually appears ideally healthy, and while they are smaller than we grow in our gardens, they are generally strikingly healthful in color and general appearance. Why is this so? And why do we have such a reverse of things among our gardens?
I will offer my ideas on the subject and give my theories of the causes of the various diseases and believe that they are correct and time will prove it. At least I hope these efforts of mine will be the means of helping some who are having so much trouble in the cultivation of Ginseng. The old saw that the \"proof of the pudding is in chewing the bag,\" may be amply verified by a visit to my gardens to show how well my theories have worked so far. I will show you Ginseng growing in its highest state of perfection and not a scintilla of blight or any species of alternaria in either of them, while around me I scarcely know of another healthy garden.
To begin with, moisture is our greatest enemy; heat next; the two combined at the same time forming the chief cause for most diseases of the plant.
If the soil in our gardens could be kept only slightly moist, as it is in the woods, and properly shaded, ventilated and mulched, I am sure such a thing as blight and kindred diseases would never be known. The reason for this lies in the fact that soil temperature is kept low and dry. The roots, as is well known, go away down in the soil, because the temperature lower down is cooler than at the surface.
Here is where mulch plays so important a part because it protects the roots from so much heat that finds its way between the plants to the top of the beds. The mulch acts as a blanket in keeping the heat out and protecting the roots thereby. If any one doubts this, just try to raise the plants without mulch, and note how some disease will make its appearance. The plant will stand considerable sun, however, with heavy enough mulch. And the more sun it can take without harm, the better the root growth will be. Too much shade will show in a spindling top and slender leaves, and invariable smallness of root growth, for, let it be borne in mind always, that the plant must derive more or less food from the top, and it is here that the fungi in numerous forms proceed to attack.
The plant will not grow in any other atmosphere but one surcharged with all kinds of fungi. This is the natural environment of the plant and the only reason why the plants do not all become diseased lies in the plain fact that its vitality is of such a high character that it can resist the disease, hence the main thing in fighting disease is to obtain for the plant the best possible hygienic surroundings and feed it with the best possible food and thus nourish it to the highest vitality.
