BIBLIOGRAPHY OF COTTON BOLL, WEEVIL. 25 



No. 256. Rangel, A. F., 1901. — Tercer informe acerca del picudo del algodon.<Boletin 

 de la Comision de Parasitologia Agricola, Mex., vol. 1, No. 6, pp. 

 197-206. 



Remarks on the collection of adult weevils from the plants, with description of an appa- 

 ratus which was used in several experiments with success. The results of several experi- 

 ments with the picking up of fallen infested squares are reported. The habit of retaining 

 infested fruit was noted on certain varieties and mentioned as a difficulty in destroying 

 the weevil by picking up fallen squares. The deleterious effect of heat upon the weevil 

 is mentioned and observations upon the effect of sunlight on fallen infested squares pre- 

 sented. Recommends the use of varieties with sparse foliage and the wide spacing of 

 plants; also laying c i jws so as to admit the sun as much as possible. The occurrence of 

 the mite Pediculoides ventricosus upon the egg and larva of the boll weevil is noted for the 

 first time. 



No. 257. Rangel, A. F., 1901. — Cuarto informe acerca del picudo del algodon {Insan- 

 thonomns grandis I. C. Cu.).<Boletin de la Comision de Parasitologia 

 Agricola, Mex., vol. 1, No. 7, pp. 245-261, 2 pis. 



A report on various experiments in weevil control. The report contains remarks on the 

 necessity for growing a variety of cotton which will shed the infested squares, if the picking 

 up of squares is to be of importance as a method of control. Experiments with gases are 

 reported. 



No. 258. Rangel, A. F., 1902.— Quinto informe acerca del picudo del algodon. <Bole- 

 tin de la Comision de Parasitologia Agricola, Mex., vol. 1, No. 8, pp. 

 302-317. 



The publication contains general remarks on migration of the weevil and the need of the 

 general application of remedial measures to lessen this spread. The fall destruction of 

 stalks is discussed at length. Extensive experiments with and observations on the mite 

 Pediculoides ventricosus are recorded. 



No. 259. Redding, R. J., 1905. — Essential steps in securing an early crop of cot- 

 ton. <Farmers' Bui. 217, U. S. Dept. Agr., pp. 16. 



A brief practical treatise on cotton culture. In the introduction the importance of the 

 boll-weevil problem is emphasized. 



No. 260. Riley, C. V., 1885. — Natural history of other species of the genus Anthono- 

 mus.<Rept. Comm. Agr. for 1885, p. 279. 



Notice of the rearing of the boll weevil at the Department from dwarfed cotton bolls sent 

 from northern Mexico by Dr. Edward Palmer. This is the first published record of the 

 food plant and place of breeding of this species. 



No. 261. Rios, J. R., 1895. — Aparicion del "picudo" en la Laguna.<El Progreso de 

 Mexico, August 15, 1895. 



The author suggests certain means of preventing the weevil from entering the Laguna 

 district, and methods of control if it should become established. 



No. 262. Rios, J. R., 1897. — Aparicion del "picudo" en la Laguna. <E1 Progreso de 

 Mexico, ano 4, pp. 811-813, September 8. 



A statement that the weevil had been found in a portion of the Laguna district at \'iesca. 

 A previous article (see No. 201) is reprinted. 



No. 263. Rios, J. R., 1898.— A proposito del picudo. <E1 Progreso de Mexico, ano 5, 

 pp. 593-594, July 15, 

 Letter commenting on To\vnsend's method of poisoning weevils (see No. 300). 



No. 264. Roper, Daniel C, 1907.— Cotton production in the United States, 1906. 

 <Bul. 7G, Bur. Census, U. S. Dept. Comm. and Lab., pp. 7-8. 



The production of cotton in the State of Texas and in 30 counties is compared for the 

 years 1899, 1902, and 1906. 



No. 265. Roper, Daniel C, 1908.— Cotton production in the United States, 1907. 

 <Bul. 95, Bur. Census, U. S. Dept. Comm. and Lab., p. 11. 



General statement regarding the distribution of the weevil and remarks on the possi- 

 bility of producing good crops despite the weevil where improved methods of farming are 

 practiced. 



