- 48 - 
Chlordane spray (an an emulsion concentrate) at the rate of 2 pounds 
of toxicant per acre caused k$ ^>ercent mortality in 2k hours, 59 ~<>rcent 
in kQ hours and 100 percent in 1^4- days. In the plot treated with chlordane 
no retardation in the new growth or vigor was noted. — Eastings and Peur>er 
(205). 
Protostronhus sp., ground weevils 
Laboratory tests showed that 5-percent chlordane dust at the rate of 
0.11 mg./sq. cm. (10 pounds per acre) caused ltSO percent mortality in ?2 
hours. — Petty (3q3.) . 
Pseudocneorhinus bifasciatus Hoelofs, a Japanese weevil 
Preliminary tests indicated that chlordane was likely to prove more 
effective than 3HC, DDT, or arsenate of lead in controlling this weevil 
feeding on privet. — Allen (13) . 
Sitcna scissifrons Say « 
In North Dakota in 19^7 2-percent chlordane dust proved inferior to 5- 
percent DDT dust in controlling this weevil on peas. — Post et_ al. ( 371 ) . 
Sitophilus granarius (L.), the granary weevil 
In laboratory tests in which the insecticide was dissolved in oil and 
this solution allowed to spread on filter paper and age 2k hours "before 
placing the weevils on it, chlordane proved less toxic than DDT. The rela- 
tive potencies of chlordane with respect to DDT at 95, 50, and 25 percent 
kill are 0.19, 0.50, and 0.7**-. — Stringer (kkk) . 
The adults of this weevil proved suitable as test insects for the 
"bioassay of the content of chlordane in ^reparations of this toxicant. The 
method consists of exposing the weevils to deposits of the preparation and 
of the pure insecticide that it contains and comparing the median lethal 
deposits. — Krijgsman and Berger ( 26S ) . 
See under Musca domestica. — Brown e_t r^l . (^2_) . 
Trichobaris mucorea (Lee), the tobacco stalk borer 
A 5-percent chlordane dust was more effective than a 10-vercent DDT 
dust in -oreventing egg laying 3 weeks after the last application. A chlor- 
dane spray (2 pounds of 50-percent wet table powder per 100 gallons of 
ber) war, less effective than EHC, but more effective than DDT and toxa- 
phene in preventing egg laying. Chlordane was slower than BHC in killing 
the beetles caged with freshly sprayed foliage. — V'oodside (ill.). 
Ty I oderma f r .- , -nx iae (kiley), the strawberry crown borer 
Five percent chlordane dust killed 100 percent of the adults in labora- 
tory tests and gave excellent res-alts in field trials. — Kitcher ( 396 ) . 
