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MARSHALL, J. (2328) 
192 6. TEE STRIPED CUCUMBER BEETLE, DIABROTIC A VI T TATA FAB. Ontario 
Ent. Soc. 56th An n. Rept., 1925, pp. 80-83. [Abstract in Rev. Appl. 
Ent. (A) 15: 43-44. 1927.] 
Two of the four most successful insecticides were (l) hydra ted 
lime containing 2 percent free nicotine and (2) a dust consisting of 
8 percent nicotine ' sulphate (40-percent), 25 percent anhydrous cop- 
per sulphate, and 67 percent hydrated lime. 
Tree nicotine dust kills more quickly than the dust containing 
copper sulphate, "but the latter remains toxic longer and is a good 
repellent. Both these dusts give off pungent fumes that make their 
application difficult. 
OGILVIE, L. (2329) 
1926. REPORT 0? THE PLANT PATHOLOGIST EOR THE YEAR 1935. 3ermuda 
Lept. Agr. Rept. 1925, pp. 36-63. [Abstract in Rev. Appl. Ent. 
(A) 14: 624-626. 1926.] 
Potato tubers attacked by Pseudo c occus citri were dusted with 
nicotine sulphate (2 percent) and sulphur dust in the sun (tempera- 
ture about 110° E. ) . This killed about 80 percent. Dusting with 
6 percent nicotine sulphate was not effective. Submersion for 2 
hours in 40-percent nicotine sulphate (1:400 killed 60 percent of 
the mealybugs, and the addition of l/2 oz. fish oil soap per gal. 
gave very good results. 
SPEYER, E. R. (2330) 
1926. ENTOMOLOGICAL INVESTIGATIONS. Nursery and Market Gard. Ind. 
Devlpmt. Soc. Ltd., Expt. andRes. Sta. 11th Ann. Rept., 1926, pp. 
89-109. [Abstract in Rev. Appl. Ent. (A) 14: 343-345. 1926.] 
'? Dusting with nicotine up to 3 percent absorbed on calcium 
carbonate and magnesium carbonate gave no results (p. 345) against 
the red spider ( Tetranychus t elari us L. ) . 
THATCHER, R. w. (2331) 
1926. FORTY-FOURTH ANNUAL REPORT FOR THE FISCAL YEAR ENDED JUNE 
30, 1925. N. Y. (Geneva) Agr. Expt. Sta., 51 pp. [Abstract in 
Rev. Appl. Ent. (A) 14: 474-475. 1926.] 
Nicotine-lime dusts, 2, 3, or 4 percent, were highly toxic 
to cucumber beetles (Diabrotica vittata F.), provided that tempera- 
ture was high and direct contact obtained, but caused considerable 
foliage injury; light applications of dust at lower temperature, 
while not causing foliage injury, failed to control the beetles. 
Plants dusted with arsenical dusts gave better yields than those 
treated with nicotine-lime dusts, apparently mainly on account of 
the foliage injury and stunting caused by the latter. In tests for 
