- 571 - 
ZECK, E. H. (2336) 
1923. TEE GREEN PEACH aPEID, iviYZUS PERSICAE (SUIZER). Agr. Gaz. N. S. 
wales 39 (2): 147-154, illus. [Abstract in Rev. Appl. Eat. (A) 16: 
362-363. 1928.] 
Tobacco or nicotine washes will kill the aphids if the leaves 
are not too curled. A tobacco wash of 25 lb. stalk or waste tobacco 
to 72 gal. water, or 1 pt. nicotine sulphate to 100 gal. water, or a 
nicotine dust may oe used. 
HERNANDEZ, E. (2387) 
1925. THE CONTROL OE TEE YELLOW SUGAR-CANE APHIS. Rev. Agr. Puerto Rico 
14 (6): 35b-360. [In Spanish. Abstract in Rev. Appl. Eat. (A) 
15: 435. 1925.] 
The yellow sugarcane aphid (Sipha flava ) can oe controlled 
by dusting the canes i/ith nicotine sulphate, which has been found 
to destroy from 85 percent upwards of the aphids. 
DOZIER, H. L. (233S) 
1925. ANNUAL REPORT Oi THE DIVISION 01 ENTOMOLOGY. Ann. Rept. Insular 
Expt. Sta. Eio Piedras, Porto Rico 1924-25, pp. 115-124. [Abstract in 
Rev. Appl. Ent. (A) 15 : 152-153. 1927.] 
In one locality the yellow sugarcane aphid ( Sipha ' flava Eorbes) 
was successfully controlled by 3 percent nicotine dust. 
RATCHELGH, L. D. (2369) 
1921. WALNUT CULTURE IN CALIFORNIA. Calif. A r. Expt. Sta. Bull. 332, 
pp. 141-218. [Abstract in Rev. Appl. Ent. (A) 10; 286. 1922.] 
By the addition of 1 pt. Black Leaf 40 to eacn 200 gal. of 
arsenate the spray (used to control codling moth) will also be effective 
• against aphids. For the control of aphids alone niccdust is advocated. 
WILLIAMS, C. G. (2390) 
1922. 41ST ANNUAL REPORT OE THE OHIO AGRICULTURAL EXPERIMENT STATION 
TOR THE YEAR ENDED JUNE 50, 1922, 59 pj. , illus. [juDs tract in Rev. 
Appl. Ent. (A) II: 519. 1923.] 
Experiments with a preparation' of derris (I to 1,200) shoiv it to 
be less effective than nicotine sulphate (l tcaspoonful to 1 gal. soapy 
water) for the control of aphids. Nicotine as a dust proved more ef- 
fective than spraying r. ith liquids against aphids on apple. 
PARROTT, P. J., STEWARD, P. C, and GLASGOW, H. (2391) 
1923. SPRAYIliG AND DUSTING EXPERIiuENTS WITH iiPPLES IN 1923. N. Y. 
Agr. Expt. Sta. Circ. 70, 9 pp. [Abstract in Rev. Appl. Ent. (A) 
13: 81. 1925.] 
