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A 50-percent chlordane wetta"ble powder (l/4 pound toxicant per 100 
gallons of water) was less effective than a micronized DDT vettable powder 
(l/3 pound toxicant per 100 gallons of water) in reducing flea "beetle 
damage on potatoes. Chlordane produced significantly "better yields than 
DDT in a field trial.— Turner and Woodruff ( 462 . 463) . 
Ep_itrix hjrtipennis (Melsh.), the tobacco flea "beetle 
A spray containing 1 pound of chlordane as a 50-percent wettable 
powder and 3 pounds of Fermate in 100 gallons of water gave S6 percent un- 
injured plants in tobacco plant beds as compared to 17 percent in the 
check and 99 percent in the "bed treated with DDT spray. The chlordane 
did not injure the plants. On newly set tobacco this chlordane spray gave 
65 percent reduction of the flea beetle population as compared to 98 per- 
cent reduction effected by a DDT spray. All materials were applied in the 
plant bed a few hours before the plants were pulled for transplanting. — 
Dominick ( 110) . 
Leptjnotarsa decern! ineata (Say) , the Colorado potato beetle 
Chlordane at 2 pints per 100 gallons of water (0.24 percent) killed 
91.7 percent of the larvae 1 day after treatment. Chlordane-DDT emulsion 
(25 percent by weight of each) at 2 pints per 100 galloni of water (0.03125 
percent of each) killed 92.1 percent of the larvae 1 day after treatment. 
The results obtained with chlordane were not significantly different from 
the kills obtained with DDT alone. — Kulash (270). 
In laboratory tests a 1-percent chlordane dust killed 78.3 percent 
of the adults and 14.7 percent of last instar larvae in 4 days. In green- 
house tests a 1-percent chlordane dust killed 91.7 percent of the adults 
and 100 percent of last instar larvae in 2 days. In field tests a 1-per- 
cent chlordane dust killed 88.4 percent of the adults and 100 percent of 
3rd and 4th insta* larvae in 2 days. — Sun e_t al. ( 450) . 
In laboratory tests chlordane proved only 10 to 15 percent as effec- 
tive as the gamma isomer of benzene hexachloride when tested on larvae. 
The insecticides were applied as dusts and sprays and the mortality deter- 
mined after 4 days. — Raucourt (3.84) ; Raucourt and Viel Q85) • 
Aqueous sprays of chlordane and DDT applied to potato foliage and 
later infested with third and fourth instar larvae of the Colorado potato 
beetle showed chlordane -to be more toxic than DDT to this insect. — Kearns 
et al. (245). 
Chlordane proved better than calcium arsenate and almost as good as 
DDT in Ontario in 1948. These three insecticides were more effective 
when used alone than when mixed with fungicides. — Doyle and Duncan ( 113 ) . 
Phyllotretfl striolata (F.) f the striped flea beetle 
In greenhouse tests a 1-percent chlordane dust killed 100 percent of 
adult beetles in 1 day. In field tests a 1-percent chlordane dust killed 
97*3 percent in 3 days and a dust containing 1-percent chlordane plus 0.25 
percent rotenone killed 100 percent. — Sun e_t aj... ( 450 ) . 
