- 555 - 
A 4 percent nicotine dust, composed of hyd rated lime and 
nicotine sulphate, applied to beetles on apple twigs in the labora- 
tory, gave complete control in 10 minutes at a temperature of 70° F. , 
but it was less effective in the field. 
ANONYMOUS ( 2324) 
1926 ENTOMOLOGICAL INVESTIGATIONS, His. Agr. Expt. Sta. Ann. Rept. 
1924-1926, Bull. 388, pp. 60-75, illus. [Abstract in Rev. 
Appl. Ent. (A) 15: 294-295. 1927.] 
Eor combating the black cherry aphid, M yzus c erasi F. , a dust 
made by adding 2 pt. 40-percent nicotine sulphate to 50 lb. hydrated 
lime stirred in with coarse gravel that was afterwards screened off 
proved fairly satisfactory, but is probably too expensive for practical 
use. 
BOYD, 0. C. (2325) 
1926. THE RELATIVE EFFICIENCY OF SOME COPPER LUSTS AND SPRAYS IN THE 
CONTROL OF POTATO DISEASES AND INSECT PESTS. Cornell Univ. Agr. 
Expt. Sta. Bull. 451, 63 pp. [Abstract in Rev. Appl. Ent. (A) 
15: 132. 1927.] 
Copper dust containing nicotine when applied to damp foliage 
proved superior to the same dust without nicotine in controlling 
aphids. One dust consisted of 6.5 percent monohydrated copper sul- 
phate; 10 percent calcium arsenate, 1.9 percent nicotine sulphate 
and 81.6 percent hydrated lime was more effective against aphids 
than a sulphur dust containing 1.9 percent of nicotine. 
CHITTENDEN, F. H. , and WHITE, W. H. (2326) 
1926. THE MELON APHID AND ITS CONTROL. U. S. Lept. Agr. Farmers' Bull. 
1499, 16 pp., illus. [Abstract in Rev. Appl. Ent. (A) 14: 490. 
1926.] 
A 2 percent nicotine dust at the rate of 35 to 40 lb. an 
acre, applied at a temperature above 70 F. when the foliage is dry 
will e ff ectively control Aphis g ossvpi i Glov. 
HINDS, W. E. (2327) 
1926. PROGRESS IN COTTON BOLL YJEEVIL CONTROL. Jour. Econ. Ent. 19: 
112-121, illus. [Ab3tract in Rev. Appl. Ent. (A) 14: 266-267. 1926.] 
Over 98 percent of Aphi s gossvpii Glov. on cotton are destroyed 
by dusting from an airplane with a mixture of 94 parts by weight of 
calcium arsenate and 6 parts 40-percent nicotine sulphate applied at 
the rate of 8 - 9 lb. dust per acre. 
