- 549 - 
PHILLIPS, E. H. , and SMITH, E. H. (2303) 
1923. PLANT PATHOLOGY. Calif. Agr. Expt, Sta, Rept. for 1923, pp. 
179-137, illus. 
Under the heading "Improved Method of Making Nicotine Lust," 
the obstacle to the use of nicotine dust is discussed, hut these 
difficulties have now "been largely obviated by the development at 
the California station of a self -mixing dusting machine, in which 
the raw materials are placed in the field and the mixing and applica- 
tion carried on at one operation. This cuts the cost to less than 
half that of factory-mixed dust and at the same time produces a 
more efficient material (p. 181). 
SMITH, R. E. , and MART DI, J. p. (2304) 
1923. A SELF-MIXING LUSTING MACHINE POP APPLYING DRY INSECTICIDES ANL 
FUNGICIDES. Calif. Agr. Expt. Sta. Bull. 357, pp. 497-506, illus. 
[Abstract in Rev. Appl. Ent. (A) 11: 392. 1923.] 
A machine was devised for mixing the ingredients that ef- 
fects great saving in expense and entails no loss of nicotine nor 
carrying over of mixtures and consequent deterioration after the 
season has ended. VJith this machine it is possible to apply the 
dust hot and to mix in any desired proportions. 
WATSON, J. R. (2305) 
1923. REPORT OF THE ENTOMOLOGIST. Fla. Agr. Expt. Sta. Rept. 
1922-1923, pp. 103R - 113R. [Abstract in Rev. Appl. Ent. (A) 
12: 492-493. 1924.] 
High-power dusting against thrips is not successful, but 
a bellows type of hand duster using dusts of nicotine sulphate and 
lime was both practical and economical. Against mealybugs 
( Pseudococcus spp.) oil emulsions and lime-sulphur were used, but a 
1-percent solution of carbolic acid, kerosene emulsion ( 1 to 15), 
and a solution of 1 qt. nicotine sulphate with 6 to 8 lb. soap per 
200 gal. water, all gave good results. For dusting bean leafhoppers 
( Empoasca mali LeB. ) , hydrated lime with 10 percent dusting sulphur, 
impregnated with 2.5 percent of nicotine in the form of nicotine 
sulphate, gave good results against the nymphs but had little effect 
on the adults. Bordeaux mixture, to which nicotine sulphate was 
added, killed adults as well as nymphs. Kaolin was not so satis- 
factory as a carrier. 
ZAPPE, M. P., and STODDARD, E. M. (2306) 
1923. RESULTS OF DUSTING VERSUS SPRAYING IN CONNECTICUT APPLE AND 
PEACH ORCHARDS IN 1922. Conn. Agr. Expt. Sta. Bull. 245, pp. 229- 
243. [Abstract in Rev. Appl. Ent. (A) 11: 381. 1923.] 
A liquid spray, consisting of 3 gal. commerical lime-sulphur, 
3 lb. dry lead arsenate, and 3/4 pt. nicotine sulphate to 100 gal. 
