-121- 
DDT Is promising for this insect.— ^Annand (7*0* 
DDT is being tested against the European corn borer, and the results 
have been very encouraging, particularly in sweet com, — Aamodt (60). 
A Byania insecticide gave better results than 3 percent DDT against 
the corn borer in Sew Jersey, but the percentage of salable ears of corn 
produced were about the same with both treatments. — AIF (6)5). 
Five applications of a 3-P«rcent Gesarol dust were applied with a 
rotary hand duster June 7» H» l6, 20, and 25, 19^ « to two 15-stalk rows 
of Golden Cross Bantam sweet corn as a plot replicated six times. Most 
larvae had left the stalks by harvest time, July 26 and 27. Dissections 
of stalks showed that 9 percent of the treated plants and 62 percent of 
the untreated plants had been infested. There was no Injury from the 
treatment. Plants treated with a cube spray (k pounds of a 5-porcent rote- 
none material in 100 gallons) had l.U. percent of the stalks infested. More 
research is needed before recommendation.— -Gould ( lffi ). 
A 3-porcent DDT dust gave a greater reduction in both the first and 
second generation borer population than a 1-percent rotenone or a ^-per- 
cent nicotine dust. The DDT interfered with growth of the corn.-— B. J. 
Agr. Ixpt. Sta. ( 275) » 
gee Bapoasca fabae ; also Popilia japonica .— tfolfenbarger et al . ( 379 ) * 
Sphingldae 
Ceratomia catalpae (Bdv.), the catalpa sphinx 
The larvae were readily controlled with DDT (0.1 to 1 percent) applied 
as an emulsion In small-scale teste*— Craighead and Brown ( 125 ). 
Protoparce quinquemaculata (Haw. ) , the tomato hornworm 
A small number of full-grown larvae dusted with Gesarol A- 3 immediate- 
ly showed signs of severe Irritation by violently swinging the anterior 
half of the body from side to side, together with defecation and excessive 
exudation of moisture. Later the larvae fell from the plant and all died 
after shrinking greatly. In a field test at Chatham, Ontario, tobacco plants 
were sprayed with DDT at l6, g, and k since* per 100 imperial gallons of 
water and in each case 100 percent control resulted. — Ross (306). 
A DBT aerosol gave excellent kills of hornworms on tomatoes. — Ditman 
(133). 
Same as Macrosiphum solanifolil (Ashm.). — H. J. Agr. Kxpt. Sta. ( 275 ) 
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