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Diabrotica undecimpunctata howardj Barber, the southern corn rootworm, 
the spotted cucumber "beetle 
In laboratory tests on the spotted cucumber beetle 5-percent chlor- 
dane dust caused 100 percent knockdown in 1 hour and 100 percent mortal- 
ity in 7.5 hours. In field plot tests on sugar pumpkins infested with 
both species 5-percent chlordane dust gave 94.8 percent control. — Walton 
am). 
In laboratory tests a dust containing 0.5 percent of chlordane 
killed 100 percent of adult spotted cucumber beetles in 4 days. In 
greenhouse tests a 3 percent chlordane dust killed 75 percent of the 
beetles in 2 days and 97.7 percent in 4 days. — Sun e_t al. (45p_) . 
In Indiana in 1946 chlordane gave a fair kill of spotted cucumber 
beetles.— Gould (186) . 
In tests made in Wisconsin in 1946 HETP, BHC, and chlordane showed 
effectiveness ranging between that of 10-percent sabadilla and 1.25 per- 
cent DDT.— Wis. Univ. (504). 
A spray containing 0.1 percent of chlordane made by diluting a con- 
centrated emulsion was about as effective as a 4-percent DDT emulsion 
spray and somewhat less effective than a 0.1 percent benzene hexachloride 
emulsion spray in preventing injury to peanut pods at Beltsville, Mary- 
land in 1947.— DobMns and Fronk (108). 
Chlordane at 4 pounds per acre was the best insecticide tried, re- 
ducing the percentage of plants damaged from 33 in the check to 2.5. — 
Kulash (277). 
Three applications to peanut foliage of emulsions containing chlor- 
dane, at the rate of approximately 0.38 pound of the active ingredient 
per acre-application, gave significant control at Beltsville, Maryland, 
where the infestation was less severe than in southeastern Virginia . 
Seven applications of certain formulations were made to the foliage on 
small plots of peanuts at Holland, Virginia during the period June 19 
to August 23 in order to obtain maximum control. The following formula- 
tions gave significant control: 5 and 10 percent chlordane dusts, and 
0.5 and 1 percent of chlordane in emulsion form. — Fronk and Dobbins ( 159 ) . 
Chlordane, 5 pounds per acre, was mixed with 4-i2-4 fertilizer. 
Twenty-four days after planting 6 percent of the plants in the chlordane 
plots were destroyed by the rootworm. Plants in the chlordane plot were 
much larger and greener from the time of emergence until the plants were 
waist high. The average yield of corn from this treatment was chlordane, 
77 bushels per acre; fertilizer alone, 58 bushels per acre; and check, 49 
bushels per acre. — Floyd and Smith ( l47 . 149 ). 
Epitrix cucumeris (Harr.), the potato flea beetle 
In field tests chlordane emulsion (20 g. in 100 ml.) diluted 1 to 
500 gave a control of 90.2 percent in 3 days. — Sun e_t al. ( 450 ). 
