46 THE CURLY-TOP OF BEETS. 



Page. 



Parker, W. B., study of control of hop flea-beetle 36 



Pears, effect of aphides, thrips, etc 31 



Phoma betse, responsibility for rotting of beets 13 



Plant juices. See Juices, plant. 



Planting, early, beets, advantages in prevention of curly-top 19-20 



Plates, description 41 



Red spiders. See Spiders, red. 



Rhizoctonia, responsibility for rotting of beets 13 



Rumex crispus, food for leafhoppers 21 



Russian thistle. See Thistle, Russian. 



Sarcobatus sp., host plant of beet leafhopper 22 



Sea-blite, host plant of beet leafhopper 22 



Seed, beet, poor, possible cause of curly-top 13 



production, menace of curly-top 9 



beets. See Beets, seed. 



Siloing, sugar beets, selection 24-25 



Soil, abnormal conditions, possible cause of curly-top in beets 13 



Sowing. See Planting. 



Spiders, red, damage to beet leaves, studies and experiments in Utah 14 



Spraying, beets, use of emulsion in control of leafhoppers 35 



Stigmonoses, resemblance to curly-top of beets 31-33 



Sugar-Plant Investigations, Office, experiments with leafhoppers 18 



Summary of bulletin 33-35 



Thistle, Russian, host plant of beet leafhopper 22 



Thrips, damage to beet leaves, studies and experiments in Utah 14 



effect on apples and pears 31 



carnations 31 



Titus, E. G., study of beet leafhopper as cause of curly-top 13 



Townsend, C. 0., investigation of curly-top 18 



study of curly-top symptoms 32 



Trees, citrus, damage by white fly 22 



Utah, curly-top of beets, outbreak at Garland experimental field, history 18-19 



study of cause and experiments 13-14 



pedigree sugar beets, planting, experiments 25 



Whaleoil-soap and kerosene emulsion. See Emulsion. 

 Whiskered beets. See Beets, whiskered. 

 White fly. See Fly, white. 



Woods, A. F., study of stigmonoses 31, 32, 33 



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