- 49 ~ 
Dasytidae 
Astylus atromaculatus Bl., the Astylus "beetle 
In laboratory tests 5-percent chlordane dust killed all "beetles In 72 
hours when applied at the rate of 0.11 mg./sq. cm, (10 pounds per acre). — 
Petty (363). 
Dermestidae 
Attagenus piceus (Oliv.), the "black carpet "beetle 
Woolen cloths impregnated with six chlorinated hydrocarbon insecticides 
at concentrations ranging from 0.5 to 3 percent by weight of cloth were ex- 
posed to larvae of the black carpet beetle for 28 days. The following 
mortalities were obtained: chlordane 75 to 100 percent; benzene hexachloride 
(6 percent gamma) to 100 percent; toxaphene 25 to 52 percent; DDT 15 to 4? 
percent; TDE 3 to 14 percent; and methoxychlor 1 to 6 percent. According to 
the visual damage and frass weight noted during these tests, the greatest 
protection to woolen cloth was obtained with DDT, TDE, chlordane, methoxy- 
chlor, toxaphene, and benzene hexachloride in the order named. Washing and 
dry cleaning seriously affected the toxicity and the protective value of all 
the treated cloths, with the exception of those treated with DDT, which re- 
sisted one washing at all concentrations. — Laudani and Marzke ( 285 ) . 
Elateridae 
Aeolus spp. , wireworms 
The results from one experiment made in Louisiana in 1947 indicate that 
most of the wireworm injury to fall-planted cane may be prevented by apply- 
ing 400 pounds of dust containing 1 percent of chlordane per acre in the 
furrow with the seed cane at the time it is planted. — Bynum et al. (63) . 
Agriotes mancus (Say), the wheat wireworms 
Chlordane gave good control at 2 to 4 pounds per acre where wireworm 
infestations were light but under heavy infestations 4 to 8 pounds were 
required. — Rawlins et ajl . ( 386 ) . 
Seed corn was treated with chlordane at the rates of 4 and 8 ounces 
of 50-percent dust per bushel. This treatment did not affect the germina- 
tion, but proved ineffective against wireworms in both laboratory and field 
tests. Both field plots were severely injured. — Dogger and Lilly ( 1,0,9.) . 
Conoderus vesper tinus (E.), the tobacco wirewor 
m 
Chlordane was mixed with screened soil, broadcast on the plots, and 
disked into the soil 3 weeks before the tobacco plants were set out. Where 
chlordane at 2.5 pounds per acre was used, 55*7 percent fewer plants were 
injured than in the untreated plots; at 3«5 pounds per acre 70.5 percent 
fewer plants were injured. BHC was more effective. — Ky. Agr . Expt. Sta. 
(218)/ 
