

INDEX. 



Aleyrodes citri. See Fly, white. Page. 



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



effect on apples and pears 31 



carnations 31 



Apples, effect of aphides, thrips, etc 31 



Atriplex sp., host plant of beet leafhopper 22 



Bacteria, possible cause of curly-top in beets 13 



Ball, E. D., study of beet leafhopper as cause of curly-top 13, 23, 24 



Beet leafhopper. See Leafhopper, beet. 

 Beets, curly-top. See Curly-top. 

 disease. See Curly-top. 



extraction of plant juices, responsibility for curly-top 20-21 



growers, importance of recognition of leafhopper 24 



injury caused by Eutettix strobi 21 



leaf -curl, types, symptoms, etc 28-29 



leaves, damage caused by aphides, studies and experiments in Utah. . . 14 



leafhoppers, comparison of work of nymphs 



and adults 18 



studies and experiments in Utah. 14 

 red spiders, studies and experiments in Utah. 14 



thrips, studies and experiments in Utah 14 



mother, use of term 12 



planting, early, advantages in prevention of curly-top 19-20 



rotting, caused by Phoma betae 13 



Rhizoctonia 13 



seed, curly-top, attack 24-25 



progeny healthy 31 



symptoms and description 12-13 



diseased, healthfulness of progeny 31, 32 



nonproduction of seed when affected by curly-top 29-31 



percentage of loss from curly-top 29-30 



production, damage to industry by curly-top 29-31 



menace of curly-top 9 



raising, effect of curly-top 24-28 



use of term 12 



spraying for control of leafhoppers 35 



sugar, attacks of hop flea-beetle, control 36 



contraction of curly -top 24-25 



initiation of curly-top by leafhoppers, study of time and manner. 25-28 



pedigree, planting in Utah 25 



selection for siloing 24-25 



whiskered, beet disease 9, 10 



young, destruction by curly-top 11 



181 43 



