﻿STEAWBERRY ROOTWORM OF GREENHOUSE ROSES 47 



February the plants must be kept coated with an arsenical dust to 

 poison any beetles which may come out of hiding and resume feed- 

 ing. The soil in the beds should be kept covered with a layer of 

 tobacco dust until drying-off time, with additional applications of 

 wood ashes at monthly intervals. The tobacco dust will kill any 

 newly hatched larvge which come in contact with it while crawling 

 on or entering the soil, and the mixture of wood ashes and tobacco 

 dust will operate to some extent against the larvae and pupae in the 

 soil. To prevent the larvae from entering the soil at an unprotected 

 spot, it is important that the tobacco dust be spread over the entire 

 surface of the soil in the bed. 



Plants and soil should not be retained in the greenhouses longer 

 than three years if the establishment of an infestation is to be pre- 

 vented. In addition cleanliness, involving the removal of dead 

 leaves and trash, must be practiced incessantly. Soil which is used 

 in the beds should either be composted for several months or steri- 

 lized before being brought into the houses. 



LITERATURE CITED 



(1) Anonym OTTS. 



1920. Seek relief from new rose scourge. In Florists' Review, vol. 

 46, no. 1171, pp. 1&-16, illus., May 6. 



(2) Blatchley, W. S. 



1910. An illustrative descriptive catalogue of the Coleoptera or 

 beetles (exclusive of the Rhynchophora ) known to occur in 

 Indiana. (Ind. Dept. Geol. and Nat. Resources Bui. 1.) 

 1385 pp., illus. Indianapolis. 



(3) Beitton, W. E. 



1922. Twenty-first report of the State entomologist for 1921, Conn. 

 Agr. Exp. Sta. Bui. 234, pp. 111-204, illus. 



(4) Clavaeeatj, HteNEi. 



1914. Junk's Coleopterorum catalogus, pars. 59. 215 pp. Berlin, 



(5) CooE, A. J. 



1881. A new insect enemy. In 10th Ann. Rpt. Sec. State Hort. 

 Soc. Mich., 1880, pp. 293-295. Lansing. 



(6) CoEY, B. N. 



1917. Insects of 1916. In Rpt. Md. Agr. Soc, vol. 1, for the year 

 1916, pp. 200-208, Ulus. 



(7) Ceotch, G. R. 



1873. Materials for the study of the Phytophaga of the United States. 

 In Proc. Acad. Nat. Sci. Phila., vol. 25, pp. 19-83. 



(8) Dejean, P. F. M. A. 



1833. Catalog des col6opt6res de la collection de M. le Comte Dejean, 

 ed. 3, 443 pp. Paris. (Same reference on p. 436 of ed. 4, 

 1837.) 



(9) Fabbicius, J. C. 



1801. Systema Eleutheratorum, vol. 2. 687 pp. Kiliae. 



(10) Felt, B. P. 



1906. Insects affecting park and woodland trees. N. Y. State Museum 

 Mem. 8, vol. 2, pp. 333-877, illus. 



(11) Fl-ETCHER, James. 



1894. Injurious fruit insects of the year 1894. In 25th Ann. Rpt. Ent. 

 Soc. Ontario, 1894, pp. 76-81, illus. 



(12) 



189.5. Report of the entomologist and botanist. In Rpt. Exp. Farms 

 [Canada] f. 1894, pp. 183-226, illus. Ottawa. 



(13) Forbes, S. A. 



1884. Insects injurious to tlu; strawberry. In 13th Rpt. State Ent. 

 . . . Illinois (or 2d Ann. Rpt. of S. A. Forbes for the year 

 1883), pp. 60-180, illus. Springfield, 111. 



(14) Gibson, Aethue, and Ross, W. A. 



1922. Insects affecting greenhouse plants. Dominion of Canada Dept. 

 Agr. Bui. 7, n. s., 63 pp., illus. 



