April, '17] HEADLEE: STRAWBERRY WEEVIL 287 



(13) Seidlitz, Geo. Naturgeschichte der Insekten Deutschlands, vol. V, pp. 



533-536. 1894. Characterization of genus, description of species, synonymy, 

 bibUography and distribution. 



(14) Hamilton, John. Trans. Anier. Entom. Society, vol. XXI, p. 401. Dec, 1894. 



Distribution. "Breeding in the waste and dust in feed stores." 



(15) Champion, G. C. Entomologists' Monthly Magazine, vol. XXXI, p. 283. 



Dec, 1895. A. 4-pii^t.ulahis a synonym; species no doubt of American origin. 



FURTHER TRIAL OF SULPHUR-ARSENATE OF LEAD DUST 

 AGAINST THE STRAWBERRY WEEVIL^ 



By Thomas J. Headlee, Ph.D., New Brunswick, N. J. 



Last year before this Association it was shown by the writer that 

 sulphur-arsenate of lead dust when maintained as a rather complete 

 coating from the time bud-cutting begins until most of the buds have 

 "opened gives, in the case of the Heritage variety, almost complete 

 protection from the strawberry weevil {Anthonomus signatus Say). 

 It was stated at that time also that the protective action seemed to 

 be due to a repellent effect. 



The results were so surprising that confirmatory tests were planned 

 for the season of 1916. The tests involved the treatment of straw- 

 berries on at least two farms in each of three counties. The plots to 

 which the writer gave most careful attention were located on the farm 

 of Mr. William Oeser of Cologne, N. J. 



Mr. EUwood Douglass ably and conscientiously assisted in the tests 

 at Cologne and took charge of those elsewhere in Atlantic County, 

 while Mr. Warren Oley and Mr. George T. Reid performed the same 

 tasks in Cumberland and Burlington Counties, respectively. While 

 a large measure of protection was obtained in each of the counties 

 included in the tests, the best results were had on the plots on Mr. 

 Oeser's farm. 



The arrangement of the plots in this test are shown in the accom- 

 panying diagram. 



At this point the first treatment was given before the Champion 

 buds had hardly appeared and just as injury began on the Heritage. 

 Considering the lateness of the Champion it seemed advisable for the 

 sake of thorough protection to dust three times instead of two as is 

 usual in dealing with a single variety. The dusts were applied with a 

 Tow-Lemons one-man dust gun but the experience with it demon- 

 strated the need for traction or power machinery in dealing with 



^Contribution No. 2 from the Entomological Laboratory of Rutgers CoUege and 

 the N. J. Agr. Expt. Stations. 



