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GENESEE, L. G. (2454) 
192 6. THE MINT FLEA-BEETLE. Mich. Agr. Expt. Sta. Spec. Bull. 155, 
13 pp., illus. [Abstract in Rev. Appl. Ent. (A) 15: 94-95. 1927.] 
Nicotine dusts containing even as much as 4 percent nicotine 
failed to kill mint flea beetles (Longi tarsus menthaphagas Gent.). 
KORFF, G. , and BONING, K. (2455) 
1933. THE HORSE- RADISH LEAF-BEETLE', ITS BIONOMICS AND ATTEMPTS AT ITS 
CONTROL. Prakt. Bl. Pflanzenbau u. Schutz. 11 (3-4) : 93-100, 
illus. [In German. Abstract in Rev. Appl. Ent. (A) 21: 396. 1933.] 
Much loss is caused to the horseradish crop in Bavaria by the 
chrysomelids Phaedon coc hle ariae E. , P. c ochleariae var. neglectus 
Sahib. , and P. armoraciae L. Dusts containing nicotine acted im- 
mediately; though some of the beetles were a t first only paralyzed, 
they died in 1 to 2 days. Nicotine sprays caused 100 percent mortality. 
Dusts are easier to apply in the field and those containing nicotine 
or pyre thrum are preferable, because they do not injure plants or 
leave dangerous residues on them. 
NEWTON, H. C. F. (2456) 
1928. EXPERIMENTS ON THE CONTROL OF FLEA-BEETLES OF THE GENUS 
PHYLLOTRETA INJURIOUS TO CULTIVATED CRUCIFER CROPS. Jour. So. East. 
Agr. Coll. T/ye, No. 25, pp. 116-140. [Abstract in Rev. Appl. Ent. 
(A) 16: 617. 1928.] 
A spray of 0.15 to 0.2 percent nicotine sulphate and 4 to 5 lb. 
of free soft soap per 100 gal. applied at the rate of 30 to 40 gal. an 
acre, proved an effective deterrent. A dust of 2.5 percent nicotine 
sulphate with a kaolin base at the rate of 30 to 40 lb. an acre is ef- 
fective only when applied in the presence of dew. Nicotine sulphate, 
especially a 0.5 percent solution, was the only spray with the exception 
of pure nicotine found to have any effective insecticidal action. 
GLENDENNING, R. (2457) 
1927. THE CABBAGE FLEA- BEETLE AND ITS CONTROL IN BRITISH COLUMBIA. 
Canada Dept. Agr. Pamphlet n.s. 80, 10 pp., illus. [Abstract in 
Rev. Appl. Ent. (A) 15: 380-381. 1927.] 
By far the best remedy tried for the control of Phyllotreta 
alb ionic a Lee. was a nicotine sulphate-hydrated lime dust containing 
3 percent actual nicotine. This should be applied on warm days when 
the temperature is 70 F. or over. Three applications in spring and 
one or two in August should keep the pest down to negligible numbers. 
• (2458) 
1928. SOME OBSERVATIONS ON NICOTINE DUST. Ontario Ent. Soc. 58th 
Ann. Rept. 1927, pp. 25-27. 
