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Cicadellidae 
Aoeratagallla uhleri (Van D*), the western clover leafhopper 
la Nebraska 3-perc«nt DDT dust reduced the population to an in- 
aigaifioant 1 evel •— Tate et al. (342 ) ■ 
A 5-peroent DDT dust and a apray containing 4 pounda of 10-peroent 
DDT in pyrophyllite per 100 gallons of water greatly reduoed the numbers 
of adults and nymphs on potato plants in western Hebra ska. — Hill (209 ) • 
Dikraneura cooker ellii Gillette 
Sajse as for Brythraaeura variabilis * — Anon* (49), Vorhies and Wehrle (364 ) 
Bnpoasoa. abrupta DeL*, the western potato leafhopper 
In small field test8 a 3-peroent DDT dust, or a 1-peroent DDT dust 
with sulfur, reduoed the leafBopper-oymph population about 96 percent 
for at least 19 days. Dueti&g s3sX£e? alone reduoed the number of nymphs 
by about 50 percent*— J eppson and Borden (229) • 
aapoaaoa fabae (Barr*) , the potato leafaopper 
The potato leafhopper is controlled best by the higher (5 percent) 
concentration of DDT dust» The residues conapiououaly gave uore eatis- 
faotory kill of the young nymphs than the adult leafhoppers*— Granovaky 
At Beltaville, lid*, a great reduction in numbera of the potato leaf- 
hoppor on alfalfa and peanuta was obtained by two applicatiana 9 daya 
apart of a dust containing 2 percent of DDT in pyrophyllite, or of a 
apray conaiating of a mixture of 0*66 percent of DDT in duat form with 
water, with a 8preader added. Material increaae in yield and quality 
of hay waa obtained in the treated alfalfa plota* Two applioation8 16 
daya apart of -the 8ame apray and duat to peanut8 resulted in great re- 
duotion of the leafhopper population but mo increase in yield because 
of severe leaf spot infection on both treated and untreated plots late 
in the season*— Paokard (285 ) • 
Although the knook-down of leafhoppers right after treataaat with 
DDT is less conspicuous than with pyrethrun, DDT gave better long-run 
results and almost complete oontrol of the leafhopper nymphs for a long 
time after eaoh application*-- Granovsky (186) * 
Potato leafhoppers were kept down by three applications of a 6- 
peroent DDT duat per season*— Granovsky (18 6 )* 
