-80- 
Haude, in advertising literature published by John Powell and Co., New 
York, N, Y., in 1939, recommended cube or derris dust (0.75 percent rote- 
none) at 25 to 30 pounds per acre, or spray, 5 pounds of powder (4 percent 
rotenone) per 100 gallons of water, for the control of the cabbage looper. 
Jones (226) in 1939 recommended derris or cube for the control of the 
cabbala looper. 
Nettles ( 291 ) in 1939 recommended derris dust (0.75 percent rotenone) 
at the rate of 15 to 20 pounds per acre for the control of the cabbage 
looper in South Carolina. 
Smith and P.eid ( 374 ) in 1939 reported tests against the three common 
species of cabbage caterpillars, including the cabbage looper, using four 
insecticides, 'i.e. , pyre thrum- talc (1:2); derris-dust mixtures containing 
0,5 and 1.0 percent of rotenone, respectively; and a combination of derris- 
pyrethrum (0.5 percent rotenone and 0.2 percent total pyrethrins), applied 
at 7-, 10-, and 14— day intervals. The results indicated that pyrethrum was 
more effective than derris for the cabbage looper. The combination of der- 
ris and pyrethrum was most satisfactory for the three species as a whole, 
and resulted in the best yields. While no differences could be detected 
between the 7-day and 10-day applications, both were decidedly more effec- 
tive than the 14-day applications. 
Autographa californica (Speyer), the alfalfa looper 
Currie (88) in 1934 reported that in the Salinas, Calif., area derris 
dust had given good results on alfalfa loopers. "Liquid Rotenone" at 1:400, 
applied at the rate of 300 gallons per acre, and dust applied at 20 to 25 
pounds per acre gave good results against the alfalfa looper attacking 
young lettuce. 
The Colorado Agricultural Experiment Station (76) in 19 36 reported 
that the 1935 infestation on cabbage and caulif lower consisted of the cab- 
bage looper, the alfalfa looper, and the diamondback moth. These are more 
difficult to kill than the imported cabbage worm. Dusts carrying 0.2 per- 
cent of pyrethrins or 0.75 of rotenone, which is higher than most recom- 
mendations and also higher than the contents of most commercial dusts, 
failed to giue satisfactory control. 
Autographa chalcytes (Esp. ) 
The New South Wales Department of Agriculture ( 297 ) in 1938 reported 
that this pseudolooper may be controlled, by spraying with lead arsenate 
at the rate of 1 pound of powder in 40 Imperial gallons of w ater. It 
would be inadvisable to uso lead arsenate on vegetables such as lettuce, 
spinach, and beans, which are to be used r.s food. If the pest be suffic- 
iently serious, a spray consisting of derris powder, 1 pound in 40 gallons 
of water, may be of value in control. 
Autographa f ale if era (Kby. ), tho celery looper 
The Idaho Agricultural Experiment Station (210) in 1939 reported that 
preliminary observations indicated possible effectiveness of rotcnono dust 
against this insect. 
