-93- 
Dermestes lardarius L., larder beetle 
In laboratory tests 1 percent of DDT in kerosene gave 100 percent 
kill within 8 hours by direct contact, and complete, but much slower, 
kill (after more than 3 days in some oases) when used as a residual 
poison on filter paper*— Ross (306 ) • 
Dermestes vulpinus F«, the hide beetle 
A spray containing 0.1 percent of DDT in acetone-Deobase (90-10), 
applied direotly on adult beetles, paralyzed them within 1 hour, but all 
recovered in 6 hours,-- Goddin and Swingle (179). 
Elateridae 
Agriotes lineatus (L«) 
Agriotes obscurus (L.) 
By watering endive seedlings with a 2-percent suspension of Gesarol 
(5 percent DDT) at the rate of 100 cc. per plant almost complete protec- 
tion against wireworms can be achieved .--Goigy Colour Co. (166) • 
Limonius agonus (Say), the eastern field wireworm 
In one plot of an early planting of cabbage seriously damaged by 
this wireworm, rows were opened and a 1-percent "DDT dust v/as applied in 
open furrows at the rate of 10 pounds of DDT per acre. The dust was 
thoroughly mixed with the soil in a band about 6 inches wide, rows were 
remade, and new plants set. In another plot roots and stems of cabbage 
plants were dipped in a suspension of 1 pound of 20 percent DDT in 1 
gallon of water and transplanted* In other tests DDT added to dichloro- 
ethyl ether was applied at the rate of 1/8 gram per plant in comparison 
with dichloroethyl ether alone. In the first two treatments wireworms 
were not affected. The treatment affected growth and the plants eventual- 
ly died. The DDT-dichloro ethyl ether treatment was equivalent to the 
same dosage of dichloroethyl ether alone.— N. J. Agr. Bxpt. Sta. (275) • 
L i monius californicus Mann., the sugar-beet wireworm 
Limonius oanus Leo«, the Pacific Coast wireworm 
At Walla Walla, Wash., where the sugar-beet wireworm and the Pacific 
Coast wireworm were used in laboratory tests, the indications are that 
long periods are required to kill wireworms with DDT and that this ma- 
terial does not act as a repellent. The wireworms killed by DDT appear 
to be desiccated, as though affected by a strong alkali or exposed to 
drying, whereas those killed by fumigants are usually stiff and bloated. 
