This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...copper sulfate, ten to fifteen gallons water), before the plants come up. As soon as the plants begin to appear, spray thoroughly with Bordeaux mixture. As the plants come up unevenly, it may be necessary to spray daily till all are up, after which thorough spraying every ten days or two weeks until the seed-heads begin to fill, will be sufficient. When the seed-heads are filling, they should be sprayed once or twice to protect them from the form of the disease known as blast. Soft rot of the roots is indicated by premature coloring of the foliage. The leaflets become bronze and then show a reddish coloration, followed by the wilting and death of the top. The roots rot, and become sticky, mushy and ill-smelling. This disease is destructive only in wet soils. Normally it is harmless, becoming parasitic on the roots only when their vitality is reduced by excessive moisture. The only remedy is thorough drainage. Rot of stems and roots causes the stem to fall over from the weakening at its base, while the roots became soft and pulpy. The disease may be recognized by the large black knots on the base of the stem or on the roots. Thorough ventilation and careful drainage are recommended. Nematode root-galls.--The nematode worm attacks ginseng plants, especially those in gardens near woodlots. The largest knots seem to be formed on the main roots. The galls may reach a large size, and rapidly rob the plant of its vitality and reduce the value of the roots. The most effective remedy is to remove the garden to an unaffected place, and to be careful not to transfer any of the worms or eggs from the old garden. Seeds or unaffected roots should be used to start the new garden. Freezing and drying of the ground are both destructive to the worms. If the soil can be steam... Это и многое другое вы найдете в книге Cyclopedia of American agriculture Volume 2 ; a popular survey of agricultural conditions, practices and ideals in the United States and Canada (Liberty Hyde Bailey)