=Root-knot= (_Heterodera radicicola_ (Greef) Muel.) attacks tomatoes in greenhouses and is in some cases an important factor in southern field culture. It is caused by a parasitic eelworm or nematode, of minute size, which penetrates the roots and induces the formation of numerous irregular swellings or galls, in which are bred great numbers of young worms. The effect on the plant is to check growth and diminish fruitfulness, in advanced cases even resulting in death. _The remedy in greenhouse culture_ is thorough soil sterilization. In the open field this is impracticable and recourse must be had to a rotation with immune crops, which will starve out the root-knot. It must now be borne in mind that the root-knot worm can attack cotton, cowpea, okra, melons and a very large number of other plants. The only common crops safe to use in such a rotation in the South are corn, oats, velvet beans, beggar weed, peanuts, and the Iron cowpea. The use of other varieties of cowpea than the Iron is particularly to be avoided, on account of the danger of stocking the land with root-knot. Fortunately, the disease is serious only in sandy or light soils. =Rosette= (_Corticium vagum_ (B. & C.) var. _solani_ Burt.) is a disease of minor importance, which occurs in Ohio, Michigan, and scatteringly in other states. The fungus causing it (_Rhizoctonia_) attacks the roots and base of the stem, forming dark cankers. The effect on the plant is to dwarf and curl the leaves and to restrict productiveness. The potato suffers more severely from the same trouble. Rotation of crops and liberal application of lime to the soil are advised for the control of rosette in tomatoes. INDEX PAGE Adaptations of varieties, 97 as to habit, 97 as to foliage, 100 as to fruit, 102 Botany, 1 Canning, cost of, 118 on the farm, 118 Essentials for successful, 119 Catalog descriptions incomplete, 110 Characteristics of blossom, 25 Characteristics of fruit, 26 Development from original form, 26 Effect of conditions on, 26 Quality, 26 Characteristics of plant, 20 Checking of growth, effect upon, 20 Natural environment, 20 Uniform growth, importance of, 21 Characteristics of root, 23 Characteristics of stem and leaves, 24 Classification, 4 Cherry, 5 Cultivated varieties, 10 Currant, 4 Pear, 7 Cold-frames, construction, 53 Commercial importance of crop, 18 Cost of crop, per acre, 121 as grown for canners, 117 Covers for plant beds, 55 Cultivation, 76 Care and thoroughness necessary, 76 in greenhouse, 77 in home garden, 77