Root-knot and its control . Fig. 1.—Root-Knot on Sugar Beet. **^. ?-^ \ , \^^ Z^w3mSH3mB^ ^m k^^- ^ k Fig. 2.—Root-Knot on Squash. Bui. 2 1 7, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate 111 =. Fig. 2.—Root-Knot on Clover. INDEX. Page. Abbey, G., on control of root-knot 55-56, 76 Africa, German East, occurrence of root-knot 23 occurrence of root-knot 23, 25, 38, 42 South, occurrence of root-knot 23, 38,42 Agrostis alba. See Redtop. Air, conditions favorable to root-knot 42-44 See also Moisture, and Temperature. Alabama, occurrence of root-knot 23, 64 Alexandria, Va., investi
Root-knot and its control . Fig. 1.—Root-Knot on Sugar Beet. **^. ?-^ \ , \^^ Z^w3mSH3mB^ ^m k^^- ^ k Fig. 2.—Root-Knot on Squash. Bui. 2 1 7, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate 111 =. Fig. 2.—Root-Knot on Clover. INDEX. Page. Abbey, G., on control of root-knot 55-56, 76 Africa, German East, occurrence of root-knot 23 occurrence of root-knot 23, 25, 38, 42 South, occurrence of root-knot 23, 38,42 Agrostis alba. See Redtop. Air, conditions favorable to root-knot 42-44 See also Moisture, and Temperature. Alabama, occurrence of root-knot 23, 64 Alexandria, Va., investigations of root-knot 47 Alfalfa, susceptibility to root-knot 17, 24,43 Algeria, occurrence of root-knot 23 Amaranthus spp., susceptibility to root-knot 12, 69 Ammonium silicofiuorid, application for control of root-knot 55-56 sulphate, application for control of root-knot 54-56, 57, 58 Andropogon spp., susceptibility to root-knot 12, 21 Anguillula spp., synonyms of parasite causing root-kpot 8, 9, 71 Animals, agency in spreading root-knot 38, 73 Aphelenchus sp., vitality tests , . 30 Apple, susceptibility to root-knot 17, 24 Argentina, occurrence of root-knot 23, 42, 61 Arizona, occurrence of root-knot
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