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PARROTT, P. J., GLASGOW, H. , and MACLEOD, G. F. (2287) 
1921. CONTROL OF APPLE RED BUGS BY DUSTING. H. Y. Agr. Expt. Sta. 
Bull. 490, 30 pp., illus. [Abstract in Rev. Appl. Ent. (A) 10: 
363-364. 1922.] 
Nicotine sulphate at the strength of 1/4 or l/2 pt. to 100 gal. 
of either soap or lime sulphur solution showed considerable toxicity. 
Dusts containing 0.25, 0.50, 1.0. and 2.0 percent nicotine were toxic 
to the hugs. Tobacco dust either alone or with soap or lime sulphur 
solution showed a high degree of toxicity. These apple redbugs 
( Lygidea mendax Reut. and Keterocordylus malinus Reut.) are more 
efficiently and economically dealt with by spraying than by dusting. 
Temperatures ranging from 44 to 87° F. and moisture on foliage 
apparently had no influence on the toxic properties of dusting 
mixtures. 
ZltoMERLEY, H. H. , GSISE, F. TT. , and WILLEY, C. R. (2288) 
1921. DUSTING VEGETABLE CROPS IN EASTERN VIRGINIA. PRELIMINARY REPORT 
Va. Truck Expt. Sta. Bull. 35 and 36, pp. 193-208, illus. 
[Abstract in Rev. Appl. Ent. (A) 10: 559-560. 1922.] 
Under both laboratory and field conditions hydrated lime, 
kieselguhr, and kaolin as carriers of nicotine proved of equal 
value in aphid control, lime being the cheapest. In the labora- 
tory 3 percent nicotine dust proved the most effective in the con- 
trol of iviyzus persicae , Macrosiphum solanifolii , Brevicoryne 
brassica e, and Aphis gossypii . Taking the average for these four 
species of aphids, the 1, 2, and 3 percent nicotine impregnated 
dusts killed 72.2, 82.1, and 89.3 percent respectively. For the 
two first-named aphids on spinach a hydrated lime carrier with 
2 percent .nicotine impregnated dust proved the most economical. 
The quantity necessary ranged from 20 to 40 lb. per acre. 
BRITTAIN, U. H. (2289) 
1922. THE APPLE SUCKER (PSYLLAMALI SCHMIDBERGER) . Jour. Econ. Ent. 
15: 96-101. [Abstract in Rev. Appl. Ent. (A) 10: 307-308. 1922.] 
Nicotine sulphate Z>/& pt. to 100 gal. water is recommended against 
the nymphs. Very good results were also obtained with a dust con- 
taining 2 percent or more of nicotine sulphate (40 percent nicotine) 
with sulphur as a base. The effectiveness was increased oy the addition 
of lime. Clay used in place of salphur gave inferior results. Under 
favor? ble conditions the adults were killed by fumigation with waste 
tobacco free from incombustible material at the rate of 360 lb. to 
the ac re . 
