22 BIBLIOGRAPHY OF COTTON BOLL WEEVIL. 



No. 224. Newell, Wilmon, 1907. — Fighting the boll weevil by picking up the infested 

 squares. <Cir. 15, State Crop Pest Comm. La., 4 pp., June. 



Discussion of the value of picking up and destroying of fallen fruit as an adjunct to cul- 

 tural methods recommended. Recommends picking up squares until July 25. 



No. 225. Newell, Wilmon, 1907. — The State Crop Pest law of Louisiana and rules 

 and regulations of the State Crop Pest Commission in effect July 1, 1907. 

 <Crr. 17, State Crop Pest Comm. La., 19 pp., July. 



Contains an introductory statement by Mr. Newell, the act which was passed by the 

 House of Representatives and approved Dec. 15, 1903, and rules and regulations of the 

 State Crop Pest Commission of La. in effect on July 1, 1907. 



No. 226. Newell, Wilmon, 1907.— (See No. 166.) 



No. 227. Newell, Wilmon, 1908.— The boll weevil. <State Crop Pest Comm. La., 

 2d Bien. Rept. of the Secretary for the years 1906-1907, pp. 9-16, and 

 an appendix. 



Report on the work of the commission during 1906-1907. Brief discussion of spread of 

 weevil and quarantine regulations which were enforced up to February 4, 1908, when the 

 quarantine was repealed in toto. The following topics are also discussed: Cultural experi- 

 ments; autumn spraying experiments; weevil destroying machines and boll weevil "reme- 

 dies;" boll weevil parasites; the Shreveport laboratory; cooperation with the Bureau of 

 Entomology; e.xperiments with Paris green. Under the last topic is presented the results 

 of several extensive field tests of Paris green against the boll weevil, and summary of the 

 results of a special tour of investigation made by the Commission through a region where 

 Paris green was extensively used. These experiments showed that no increase in crop 

 resulted from the application of Paris green. 



No. 228. Newell, Wilmon, 1908.— The early cotton and the boll weevil. <Cir. 22, 

 State Crop Pest Comm. La., 7 pp., May. 



Discussion of abundance of weevils emerging from hibernation and the mortality among 

 these individuals. Recommends picking up infested squares until June 15 or 20. 



No. 229. Newell, Wilmon, and Barber, T. C, 1908. — Preliminary report upon experi- 

 ments with powdered arsenate of lead as a boll weevil poison. <Cir. 23, 

 State Crop Pest Comm. La., pp. 9-40, 3 figs., July. 



Review of literature appertaining to use of Paris green against the boll weevil. Results 

 of Paris green e.xperiments in Louisiana are presented. These experiments demonstrated 

 a^in the fallacy of the Paris-green theory. Field and cage experiments with the use of 

 powdered arsenate of lead are described and results recorded. 



No. 230. Newell, Wilmon, 1908. — Destroying the boll weevils before they enter 

 hibernation. <Cir. 24, State Crop Pest Comm. La., pp. 41-48, August. 

 A plea for the destruction of cotton stalks In the fall. 



No. 231. Newell, Wilmon, and Paulsen, T. C, 1908.— The possibility of reducing boll 

 weevil damage by autumn sprajdng of cotton fields to destroy the foliage 

 and squares. <Journ. Econ. Ent., vol. 1, pp. 113-117. 



Discussion of experiments with various chemical sprays used In an effort to destroy 

 cotton plants in fall without injiiring lint. A 3 per cent solution of Iron sulphate was 

 found to accomplish good results. 



No. 232. Newell, Wilmon, and Rosenfeld, A. H., 1908. — A brief summary of the 

 more important injurious insects of Louisiana. <Journ. Econ. Ent., vol. 

 1, p. 151. 



Note regarding comparative area of infestation in Louisiana. 15,000 square miles are 

 heavily infested; 14,000 square miles have comparatively slight infestation. 



No. 233. Newell, Wilmon, and Treherne, R. C, 1908. — ^A new predaceous enemy of 

 the boll weevil. <Joum. Econ. Ent., vol. 1, p. 244. 



Note of the destruction of adult boll weevils by the carabid beetle Evarthrus sodalis LeC, 

 and by another species of Evarthrus. 



