sat 























‘the eggs in the check did not hatch well, this experiment is not con— 
clusive. * * * Control of the larvae with rotenone dissolved in acetone 
was extremely good shortly after application, but a week later it was 
poorer than with lead arsenate. Pyrethrum, in both alcoholic and oleic 
‘solutions, also gave fairly good control immediately after spraying. * * * 
In all, over 400 larvicidal tests were made, but.as nearly every test of 
an insecticide was repeated six times, three times immediately after 
“Spraying and three times a week later, this work includes only 66 tests 
of different combinations or dilutions." 
z Life—history studies of the peach borer (Synanthedon exitiosa Say) 
at Harriman, Tenn., have been completed and are reported by H. G. Butler, 
as follows: "Adnlt emergence began June 11 and continued until September 
gl. * * * Between August 27 and September 16 1,569 moths were recorded 
as emerging from the treated and untreated trees. This constitutes 67.5 
"per cent of the season's emergence. It was found that over 40 per cent 
'O0f the adults emerged at approximately 6 or more inches from the tree. 
_Insectary studies of the potential oviposition of adults of the peach 
borer show that the average of 26 adults was 761 eggs each. The actual 
oviposition was approximately half the potential oviposition under in- 
‘sectary conditions. The average incubation period of 421 peach borer 
eggs was 9.2 days, with a minimum of 7 and a maximum of 12 days." 
4 
, : 
“ G. A. Runner, who is engaged in grape insect investigations at San- 
dusky, Ohio, has been testing adhesives for grape sprays. He states: 
»"Sulphonated castor oil, * * * was found to give excellent spreading and 
adhesive qualities to spray mixtures during the course of the experimental 
Mork of 19350." 
man. G. F. Moznette, Albany, Ga., submits results of field tests of con- 
tact insecticides against the black pecan aphid (Myzocallis fumipennel- 
lus Fitch) which may be summarized as follows: As ordinarily used with 
potassium fish-oil soap, nicotine sulphate 40 per cent requires a con- 
“centration of approximately 1 to 1,000 for satisfactory results. With 
potassium oleate soap and with a commercial "activator," nicotine as 
dilute as 1 to 4,000 gave comparable results. When combined with calcium 
caseinate, on the other hand, the nicotine sulphate was rendered some— 
what less effective than when used with ordinary fish—-oil soap. 
Minutum Riley as a parasite of pecan insects at Albany, Ga., Herbert 
‘Spencer says: "The Albany strain of Trichogramma, a bright yellow 
variety, has been increased greatly during October, and the indications 
are that this local strain will be superior to the one from Texas in 
traveling ability, length of life, and reproductive capacity." 
