- 5o6 - 
Sprays of 4 percent soap or to"bacco extract (1 to 3,000) and a 
nicotine dust combined. v. ith flowers of sulphur were applied in fields, 
against aphids (A phis goss ypii G-loV.) on cotton. Complete mortality 
was not obtained, though infestation oi the leaves described on an 
average ~oy about 50 percent. If a. go s syp i i and the mite Tetranychus 
telarius L. occur together, preference should be given to soap solu- 
tion or the nicotine dust combined with flowers of sulphar. 
NOVITZKII, V. ' (2364) 
1931. AK EXPERIMENT IN THE, APPLIOb.iI0i, Oi NIGODU&I aGAINST THE AUTUj,iN 
GENERATIONS Oi' THE C0TTOI-. APHIS. Za Khlopkov. i^ezavisim, Ho. 4, pp. 
52-54. [In Russian. Abstract in Rev. Appl. Ent. (A) 21: 52-53. 1933. 
Pield t-sts were carried out ..ith a dust containing 1.68 percent 
nicotine with lime as a carrier. Applied with a hand duster at the 
rate of about 40 lb. to the acre, it killed on an average 90.7 percent 
of the aphids ( Aphis gossypii Glov. ) without injury to the plants. 
GQLOVIZNIN, 1., ET AL. (2365) 
1932. TEE CONTROL OP PESTS OP COTTON. [AVIATION IS CONTROL 'OP AGRICUL- 
TURAL AND FOREST PESTS.] i..ater. 1st. Ail-Union Avio-Chem. Conf. 
iuoscow 1930, pp. 153-173. Sel 1 Kolkhozgiz [Agr. Co-op. Pub.], 1832. 
[In nussian. Abstract in Rev. Appl. Ent. (a) 20: 390-391. 1932.] 
It was found that airplanes could be used for dusting with 
flowers of sulphur against Tetranychus tela.rius L. and nicotine against 
aphids. 
PIERSTCPPP, A. L. (2366) 
1925. CONTROL OP APPIDS OP NURSERY STOCK. Jour. Econ. Ent. 18: 227-230 
[Abstract in Rev. Appl. Ent. (.a) 15: 257. 1925.] 
A lime-nicotine dust mixture (nicotine =2.7 percent) was found 
to be the best remedy for the aphids Aphis pomi DeG. and A. sorM Kc>lt., 
two or three applications sometimes proving necessary for the control 
of A. pomi . All the applications were made with hand blowers. One 
application of the dust proved sufficient to check the numbers of kyzu s 
cerasi on sweet cherry stock. 
WATSON, J. R. (2367) 
1925. ANOTHER YEAR CP THE CITRUS APHIS, Fla. Ent. (1 and 2): 9-13, 
26-28. [Abstract in R^v. Appl. Ent. (A) 14; 44-45. 1926.] 
The most satisfactory measures against Aphis pomi DeG. under all 
weather conditions are dipping the branches of small citrus trees in a 
bucket, and fumigation under tents. Por dipping, a solution of derris- 
oil, or 1 table spoonful of nicotine sulphate and 1 ounce of soap, 
per gallon is used. Por fumigation, calcium cyanide dust, or a 3 percent 
nicotine sulphate and lime dust, is used. These dusts also kill rust 
ites ( Phyllocoptes oleivorus Ash.) and coccid larvae, but red spiders 
J 
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