556 EXPEEIMENT STATION EECORD. 



The puparia formed remain over winter, the adults not appearing before May 

 of the following year. 



Experiments were conducted by the author during the summer of 1912 with 

 sprays for killing both the larvae and the flies. Only negative results were ob- 

 tained in experiments in which blackleaf 40 tobacco extract was used at the 

 strength of 1 : 700, with 4 lbs. of soap added as a sticker. In experiments in 

 which blackleaf 40 was used at the rate of 1 : 500 with 4 lbs. of soap added as a 

 sticker, young larvfe just beginning their mines were killed, and full-grown or 

 nearly full-grown larvae either went into pupation soon after tlie spraying or 

 emerged from the mines to the surface of the stalks. Cage control experiments 

 carried on with a view to destroying the adults, in which potassium arsenate 

 was used at the rate of 1 part to 45 of water to which sirup was added, re- 

 sulted in the death of the flies in 12 to 24 hours, but injury to the plants re- 

 sulted. In the second experiment in which arsenate of lead, 2 lbs. to 50 gal. of 

 water, was used, with 12 lbs. of sirup added, all the flies were found dead 

 within 36 to 48 hours. 



The author is of the opinion that when both the miner and the beetles are 

 present the use of arsenate of lead in the proportions mentioned with the sirup 

 added will control both pests, and that by pulling the infested stalks in late 

 fall or early spring, and by the use of the spray for the flies and beetles, the 

 miner can easily be exterminated. An annotated bibliography is included. 



An account of the twelve-spotted asparagus beetle (Crioccris duodecimpunc- 

 tata) (pp. 422^35) follows. This beetle, first observed in 1881 in the vicinity 

 of Baltimore, Md., has since spread northward through the North Atlantic and 

 New England States and into Canada. Injury is caused by the beetles, which 

 feed first on the stalks and branches, gnawing the epidermis and biting out large 

 pieces, and later, to a large extent, on the blossoms and berries. The larvae 

 almost immediately after they are hatched seek out and enter the berries, leav- 

 ing one berry for another until they have become matured. 



Technical descriptions of its stages and an account of the life history and 

 habits follow. " The beetles emerge about the middle of May, usually about a 

 week later than the common species. Egg laying does not begin until 3 to 4 

 weeks after the emergence of the beetles, or about the middle of June in the 

 vicinity of Ithaca. Within 7 to 12 days the eggs hatch and the larvae immedi- 

 ately enter the berries. A week to 10 days is spent within the berries before 

 the larvae become mature, when they enter the soil. Pupation lasts 12 to 20 

 days before the adults appear. In the vicinity of Ithaca the adults of the first 

 generation begin to emerge about July 20. Egg laying for the second brood 

 commences about August 1 and the larvae hatch about August 9. . . . As the 

 beetles do not begin to deposit their eggs until 3 to 4 weeks after their emer- 

 gence in spring, spraying with arsenate of lead — 2 lbs. to 50 gal. of water, with 

 2 to 4 lbs. of soap added as a sticker or 12 lbs. of sirup added when the aspara- 

 gus miner is present — will effectively destroy the beetles before they have had 

 a chance to deposit their eggs." 



An annotated bibliography of 6 pages is appended. 



The enemies of the radish, P. Noel (Bui. Lab. Regional Ent. Agr. [Rouen], 

 1918, No. 3, pp. 15, 16). — The author lists 18 enemies of radishes occurring in 

 France. 



The enemies of spinach, P. Noel (Bui. Lab. Regional Ent. Agr. \Rouen], 

 1913, No. 1, pp. 13, IJf). — This is a list of the insects attacking spinach In 

 France. 



Control of two elm-tree pests, G. W. Hebeick {New York Cornell Sta. Bui. 

 SS3, pp. J,dl-512, figs. i8).— The first part of this bulletin deals with the elm 

 leaf beetle (Galerucella lutcola), spraying for the control of which ha's been 



