
wa Shs 
T. L. Bissell, Experiment, Ga., made studies in August to deter- 
mine the height at which pecan nuts are injured by weevils, as affected 
by jarring of the trees. Results confirmed the 1930 records that most 
weevil work is in the lower portions of the trees. 
The following points have been taken from Oliver I. Snapp's final 
report on the peach spraying and dusting experiments against the plum 
curculio at Fort Valley, Ga.: The curculio infestation was extremely 
light. The final notes on foliage and budwood injury caused by the in- 
secticides tested were made on August 11. Practically no injury was 
caused by the fluorine compounds tested. Barium fluosilicate and cryo- 
lite, used as strong as 2 pounds in 50 gallons of water, caused no inju- 
ry, although potassium fluosilicate caused slight traces of burning. 
Lead arsenate caused about the normal degree of injury. A 10 per cent 
lead arsenate dust caused moderate to light injury to the leaves. Four 
applications of lead arsenate spray at the rate of 1 pound in 50 gallons 
of water caused moderately heavy foliage injury, considerable defolia- 
tion, and occasional budwood injury. Four applications of the same mater- 
ial used with the zinc sulphate—lime spray, however, caused only light to 
moderate foliage injury and very little defoliation. 
Mr. Snapp also reports results of experiments to determine the 
depth to bury peach drops to prevent the escape of C. nenuphar adults. 
"On May 12 one-half bushel of peach drops heavily infested with C. nenu-— 
phar larvae was placed in each of six boxes especially constructed for 
this work. Each boy was without bottom and-sunk 6 inches in the soil, 
so that maturing larvae would have facilities for pupating. Box No. l 
was left as a check with no soil on top." 
Box |Number of inches of soil on|Total number of C. 
No. | top of drops | nenuphar adults that 
emerged from drops 

| OE POE Cee eee ee aac 
| 
1 Check (no soil on top) | 93 
2 18 16 
3 21 | 15 
4 | 24 | 5 
Gat 30 | 13 
6 | 36 | 29 
| | 
Field spray tests in late July against the obscure scale (Chrysom— 
phalus obscurus Comst.) at Shreveport, La., are reported by Howard Baker 
as follows: "In general, the per cent control increased (1) with an 
increase in the viscosity of the oil, and (2) with an increase in the 
strength of the oil applied. None of the tests gave a satisfactory con- 
trol although a 2 per cent lubricating oil emulsion gave a good control 
of that portion of the scale population which did not settle beneath the 
parent or other old scale covering." 
