INDEX. 89 



Page. 



Strubell, Adolf, study of Heterodera schachtii 27, 35, 81 



Sturgis, W. C, on occurronco of root-knot 'l2'81 



Subtropical laboratory. See Miami, Fla. "■* 



Sugar cane. See Cane, sugar. 



Sumatra, occurrence of root-knot 23 



Summary of bulletin 72-75 



Sunflower, susceptibility to root-knot 15 22 



Susceptibility to root-knot, li.st of plants subject to attack ld-2lj 72 



Sweden, occurrence of root-knot '23 



Sweet potato. See Potato, sweet. 



Swellings, root-knot. See Galls. 



Symptoms of root-knot. See Root-knot, symptoms. 



Syntherisma sanguinalis. See Crab-grass. 



Tarnani, J., on occurrence of root-knot 15, 18, 20 81 



Tea, susceptibility to root-knot 2o' 49 



Temperature, conditions favorable to development of root-knot 24, 42^4, 73, 74 



Tennessee, probable presence of root-knot 24 



Texas, occurrence of root-knot 23, 24 38, 64, 82 



Thielavia, root-rot of tobacco, control by sterilization ' . . ' 63-64 



Thornber, J. J., on occurrence of root-knot 16 



Timothy, resistance to root-knot 21 



Tischler, G., on root-knot 14, 39, 81 



Tobacco, susceptibility to roof -knot 17, 22, 71 



Tomato, susceptibility to root-knot 17, 22, 40, 54, 55, 56, 62, 66^ 68^ 69 



Transvaal, occurrence of root-knot 23 



Trap crops. See Crops. 



Trelease, William, on occurrence of root-knot 14, 81 



Treub, M., on root-knot of sugar cane 8^ 81 



Trotter, Alessandro, on root-knot • 12, 13, 14, 15, 16, i?, 19^ 81 



Tylenchus hordei, cause of root-gall of Ehnius arenarius 15 



spp., comparison with Heterodera radiciola 22, 29, 30, 69 



synonyms for Heterodera radicicola 9 



Typha latifolia, susceptibility to root-knot 75 



Utah, occurrence of root-knot 24, 36 



Vehicles, wheels, agency in spread of root-knot 38, 73 



Velvet bean. See Bean, velvet. 



Violet, susceptibility to root-knot 8, 21, 30 



Virginia, occurrence of root-knot 24, 4i 



Voigt, description of egg sack of sugar-beet nematode 10, 20, 27, 37, 87 



Walnut, susceptibility to root-knot 16, 49 



Warming, Eug., on occurrence of root-knot 15, 81 



Washington, D. C, investigations of root-knot 9, 21, 38 



Water, runnmg, agency in spread of root-knot 37 



Watermelon, susceptibility to root-knot 14, 40, 59, 71 



Webber, H. J., and Orton, W. A., on resistance of cowpeas to root-knot 65, 71, 81 



on occurrence of root-knot in Florida 11 



Weeds, danger of harboring root-knot 68-69, 70 



Wester, P. J., a,ssistance in root-knot investigations 10 



West Indies, occurrence of root-knot 25, 23 



West Virginia, presence of root-knot 24, 43 



Wheat, susceptibility to root-knot 20, 21, 74 



Wilcox, E. M., on plant breeding 72, 81 



Wimmer, on the effect of nematodes on the sugar beet 57-58 



Wind, agency in spread of root-knot 37-38 



Winterhalter, W. K., analyses of sugar beets affected with root-knot 40-41 



Wintering of root-knot. See Heterodera radicicola, overwintering. 



Woods, A. F., investigations of root-knot 47 



Yuma, Ariz., investigations of root-knot 59 



Zimmermann, A., on occurrence of root-knot 11, 18, 81 



Zinnia spp., resistance to root-knot 21 



217 



o 



