466 EXPEEIMENT STATION EECOED. 



hibernation in March, generally about the time the young tobacco plants are 

 appearing in the plant bed. The remedial measures described are similar to 

 those recommended in the previous account. 



Life history and seasonal history notes are given on the southern tobacco 

 hornworm (Flihgtihontius sejnta). 



The tobacco moths begin to emerge from hibernation about June 1 and a 

 few days later commence to oviposit. The emergence of the moths continues 

 until the middle of August or later, a large pei'centage of the moths issuing 

 after midsummer. The larvie hatch out in about 4 days and pass through 5 

 stages in the following 10 or 20 days, at the end of which time they enter the 

 soil to a depth of from 3 to 6 in. and pupate. " Those that pupate not later than 

 the last week of July will emerge in about 3 weeks as adult moths of the second 

 generation, and will commence depositing eggs in 3 or 4 days. Those that pupate 

 after August 10 will usuallj' hibernate, and will not emerge as adult moths until 

 the following year. It is not until the third stage of growth, that is, about 10 

 to 12 days after the eggs are deposited, that the larviie injure tobacco seriously. 

 In the foui'th and fifth stages one larva will ruin a small leaf of tobacco in a 

 single day." 



Remedial measures for the hornworm are discussed at some length, and 

 summarized as follows: "Fall plowing of land that was in tobacco during the 

 year will destroy more than half of the hibernating generation and will thereby 

 reduce proportionately the number of tobacco worms that will appear the next 

 year late in July and in August. Poison worms upon tobacco plants by dusting 

 with Paris green. Poison tobacco moths by placing a few drops of arseuid of 

 cobalt (flystone) solution in 'jimson' blooms." 



These measures are also considered as applicable to the northern hornworm 



(P. (JKilKJIKIItdClihtfd) . 



Insect enemies [of the apple and pear], R. I. Smith {North Carolina Sta. 

 Bui. 206, 1)1). Jf3-S6, figs. 17). — Summarized accounts are given of the more im- 

 portant insect enemies of the apple and pear in North Carolina, together with 

 the remedial measures ai)plicable. 



Waste and reduction of timber supplies caused by insects, and m.ethods 

 of prevention and control, A. D. Hopkins {Nat. Conserv. Corn. Rpt., 1909, vol. 

 2, ;>/j.-//6'.9-'/.97).— Substantially noted from another source (E. S. R., 22, p. 260). 



Farm management for controlling' field crop insects, A. F. Conradi {8outh 

 Carolina ^Sta. Bui. 150, pi). 3-S). — A brief discussion of the application of farm 

 practice, especially crop rotation, to the control of insect pests of field crops. 



Common insecticides and fungicides with directions for the treatment of 

 farm pests, H. Garman {Kentucky ,St<i. Bui. I'/l, pp. 3-39. pis. 11). — This gives 

 an account of tJie common insecticides and fungicides with directions for their 

 use in combating insects and fungus diseases. 



Spi-aying, F. Cranefield {Wis. State Hort. Soc. Bui. 19, pp. 2-'t, figs. 15). — 

 This bulletin contains directions for the preparation and application of insecti- 

 cides and fungicides. 



Insecticides and fungicides, A. B. Cordley {Oregon Sta. Bui. 108, pp. 20). — 

 This bulletin, a revision of Bulletin 75 (E. S. R., 14, p. 1099), gives brief 

 directions for the preparation and use of insecticides and fungicides. 



Insecticides, C. E. Bradley {Oregon Sta. Bui. 107, pp. 12-16). — Analyses made 

 of insecticides, including Paris green, white arsenic, pear blight remedy, coiiper 

 sulphate, and lead arsenates are briefly reported. A sample of iron ai-senate 

 analyzed showed a moisture content of 84.25 per cent, arsenic oxid 7.37 per cent, 

 and iron oxid 5.51 per cent. 



Arsenate of lead, A. McGill {Lab. Inland Rer. Dept. Canada Bui. 205, 

 pp. 7). — A report dealing with 2G samples purchased as arsenate of lead (»f 

 which only 18 were true to name. 



