-83- 
A knapsack sprayer was used in making 5 applications of 20-percent 
DDT spray on early potatoes and 3 applications on late potatoes* Po- 
tato leafhopper counts on the treated plants varied considerably, but 
the population was definitely lower on DDT plots than on the check* 
Potato flea beetles, Colorado potato beetles, blister beetles, and tarn- 
ished plant bugs were not serious*-- Gould (184) * 
Pour pounds of a wettable powder containing 25 percent of DDT per 
100 gallons of water, applied at the rate of 125 gallons per acre, was 
more effective than bordeaux (8-12-100) in reducing flea beetles and the 
number of liieir feeding holes*-- Gui (192 ). 
Although DDT was responsible for an average reduction of about 80 
percent in flea beetle feeding, there was no apparent effect on the num- 
ber of flea beetles on the plots adjacent to those treated with DDT.— 
Wilson and Sleesman (377 )* 
Although a 3-percent DDT dust was not so effective as a 2-5-6-50 
calcium ar6enate-bordeaux spray in keeping flea beetles from feeding 
on potato foliage, bordeaux- DDT merits further testing .--Walker (365) • 
Epitrix fuscula Crotch, the eggplant flea beetle 
This insect was controlled when Gesarol A-3 dust was applied at 
3- to 5-week intervals to eggplants •— Parker (287) * 
Six applications of 3-percent DDT dust made between June 14 and July 
28 gavo very effective oontrolj "the dust was slightly superior to 35 
percent cryolite.— Tate _et al. (342 ) • 
Same as for E. cu cum er i s .— Gui (192) . 
Epitrix hirtipennis (Melsh.), the tobacco flea beetle 
In a field experiment at Oxford, N. C, a 6-peroent DDT dust gave 
66 percent oontrol based on a comparison of the number of beetles sur- 
viving on treated and untreated plots following the first 
application, and 59 percent following -the second application. Three 
60-percent cryolite dusts, each in a different diluent, gave control 
ranging from 39 to 54 percent.— *hite (373 ) . 
Same as f or B. fuscula .— Tate et al. (342). 
E. parvula (F.) 
Same as for E. cu cum er 1 s . —Gui (192). 
