- 35 - 
In the form of a 1-percent dust chlordane was more effective than 
aerosol grade DDT against the "bean aphid in greehou.se experiments in 
which aphids of various ages were included in the mortality counts. — 
Sun si fil* ( 450) . 
See under Epilachn a varivestis. — Huckett ( 229 ) . 
Anhls spiraecola Patch, the spirea aphid 
See under Macros iphum pisi . — Kearns e_t al. ( 245) » 
Macros iphum pisi (Kith.), the pea aphid 
In laboratory tests 10-percent chlordane was more toxic than 1-per- 
cent nicotine, and 2-percent chlordane was less toxic than 1-percent 
gamma-BHC . — B i shopp (^2 ) . 
In parallet tests with chlordane and DDT, applied as aqueous disper- 
sions to the spirea aphid and to the pea aphid, chlordane proved several 
times more toxic to these insects than DDT. The pea aphid is the less 
susceptible of the two species to "both compounds. — Kearns et, a2.. ( 245 .) » 
In laboratory tests 2-percent chlordane dust gave higher mortalities 
than aerosol grade DDT and toxaphene of the same concentration on adults 
of the pea aphid. In greenhouse and field experiments where aphids of 
various ages were included in the mortality counts, however, the results 
show that chlordane was less effective than technical grade DDT against 
the pea aphid. — Sun et al. ( 450 ) . 
A 5-percent chlordane high pressure aerosol gave 72 percent control 
of pea aphid in Virginia; DDT gave 94 percent control. — Anderson and 
Hof master (12) • 
Macroslphum solanifolil (Ashm. ), the potato aphid 
Tests made in Wisconsin in 1946 with tribasic copper sulfate plus 
insecticide showed chlordane both as a dust and as a spray to rank below 
HETP, DDT, nicotine, and BHC— Wis. Univ. (504 ). 
Same as for M. pisi .— Sun et al . ( 4,50 ). 
Myzus per sicae (Sulz.), the green peach aphid 
For the control of the green peach aphid on shade grown tobacco in 
Florida in 1947, chlordane at first gave an excellent kill, but later 
applications (perhaps of a different compounding) did not prove effec- 
tive.— Wilson el al. (499). 
In greenhouse experiments a 1-percent chlordane dust was more 
effective than a 1-percent technical grade DDT dust. — Sun et al. ( 450 ) . 
