-58- 
this was not improved by the use o^ dusts containing in addition 1 per- 
cent of rotenone with or withou^bentonite sulfur, or 0.5 percent each of 
rotenone and nicotine. It was as satisfactory to apply the dust at the 
appearance of the third-generation larvae, about a month before harvest, 
as during the attack of the second generation. 
.laalenotti ( 267 ) in 1937 reported the results of tests with rotenone 
spr.ay' and dust on infested peaches in the province of Veneto, Italy. Pon- 
der containing 0,9 percent of rotenone v/as sprayed as an aqueous suspen- 
sion nine times, and dust containing 0,3 percent of rotenone was also 
applied nine times. Results -were unsatisfactory. Trees not sprayed but 
periodically pruned to remove infested branches yielded 70.3 percent' of 
wormy fruit; those treated with spray yielded 79,5 percent of wormy 
fruit, and those dusted yielded 89,5 percent wormy fruit. 
The Connecticut Agricultural Experiment Station (78) in 1938 reported 
that experiments with derris were made on a block of' ; ~lborta peach trees 
laid out in Latin-square arrangement. Results showed no" improvement over 
the untreated plots, 
Flint, Farrar, and Chandler ( 136 ) in 1938 reported that three oil 
dusts (60 pounds of 300-mesh sulfur, 15 pounds of ; h_ yd rated lime, 20 pounds 
of 300-mesh talc, and 5 pounds of oil) containing derris, applied thp 
last of the season, were 37.9 percent efficient in control in 1935 in 
Illinois. In 1937 5 oil dusts (no derris) gave 70-percent control. 
Garman (152) in 1938 reported the results of tests in a Connecticut 
peach orchard. Spray applications were made on August 5, 14, and 28. 
Results were as follows: 
Fruit 
Material infested 
Percent 
Ground cube root, 4 lbs'." to 100 gal. 31,3 
of water 
Ditto, plus Ultrawet 0.25 to 0,75 28,0 
lb. to 100 gal. 
Fixed nicotine made with quebracho tannin, 23,5 
the' stock containing 4.35 percent of 
nicotine, 10 lb, , in first spray, 12 lb, 
in second and third applications 
Check — no sprays during August 25.5 
