-H- 
did not prevent rcinf est'tion within from 3 weeks to 1 month; there- 
fore, it was necessary to repeat the treatment from one to three 
times during the summer. Lead arsenate used at the rate of 5 pounds 
fco 1,000 square feet in 50 gallons of water, v;ith 2 pounds of white 
flour added as an adhesive, gave excellent temporary control and 
retained its effectiveness throughout the season under most conditions, 
"'here watering is done every day, it may be necessary in some cases 
to make two applications a month apart, usins; 10 pounds of lead 
arsenate and A pounds of flour to 1,000 square feet. 
Crambus teterellus (Zinck.) 
North and Thompson ( 308 ) in 1933 reported that damage to velvet 
bentgrass by the bluegrass webworm was reduced from an average of 
2.25 percent &6 an average of 0.25 percent by the application of 
1.5 pints of a proprlet?ry rotenone extract per 111 g'-llons of water 
per 1,000 square feet. Lead arsenate 2 pounds in 20 gallons of water 
per 1,000 square feet reduced the damage to zero. 
Crambus spp., sod webworms 
Apply a dust (1.0 percent rotenone) at the rate of 1 pound per 
100 square feet of wetted sod, or spr y with cube or derris powder 
(4- percent rotenone) at the rate of 1+ pounds per 100 gallons of 
water. — Kaude in 1939, in advertising literature, published by J,->hn 
F.owell and Co., New York, N. Y. 
Crambidae sp. (unidentified), cr9.mbids on tobacco 
L. B. Scott, at the second annual meeting of the Tobacco Insect 
Council in 1938 ( 414- ) , discussing the use of dips prior to setting 
tobacco plants, st-ted that cube dust may be used with safety but 
its effectiveness against cr^mbids is not kno-;-n. 
Galleriidae 
Arenipses sabella Kampson 
Derris and derris plus 'sulfur were ineffective against the 
greater date moth. — Dowson ( 100 ) in 1935. 
Tirnthaba sp. 
Gater ( 154 ) in 1925 reported dipping tests with larvae to det$y~ 
•mine the relative values of extracts of differ nt species of 
Derris . 
Achroia grisella (F.) 
Dusting with derris powder was unsuccessful. — Anonymous (_5) in 
1937. 
Gelechlidae . 
Dichomeris m-. t-pjnollus (F.), the juniper webworm 
'. series of sprays ?nd dusts was applied on Fay 8, 1936, to trees 
