36 BULLETIN' 1238, U. S. DEPARTMENT OF AGRICULTURE 



Plowing during the summer and fall will aid in the control of the 

 spring cankerworm. Both species are readily controlled by a thor- 

 ough application of arsenate of lead in the so-called pink spray, with 

 a second application soon after the apple blossoms have fallen. 

 "Where spraying is impracticable, satisfactory control may be ob- 

 tained by the use of barriers at the proper time to prevent the ascent 

 of the moths, and later that of the larvae hatching from eggs laid 

 beneath the barriers. 



LITERATURE CITED. 



(1) [Smith, Oliver.] 



1793. List of premiums. In Laws and Regulations of the Mass. Soc. 

 for Promoting Agr., p. 13-15. 



(2) Peck, William Dandridge. 



1795. The description and history of the canker-worm. In Mass. 



Magazine, v. 7, nos. 6 and 7, Sept. and Oct., p. 323-327, 415-416. 



(3) At water, Noah. 



1796. Another on the same subject. In Rules and Regulations of the 



Mass. Soc. for Promoting Agr., p. 45-50. 



(4) Peck. William Dandridge. 



1796. Natural history of the cankerworm. In Rules and Regulations 

 of the Mass. Soc. for Promoting Agr., p. 35-45. 



(5) [Avery, John.] 



1801. Premiums. In Papers on Agriculture, Trustees Mass. Agr. Soc, 

 p. 6-8. 



(6) Lowell, J. 



1815. Remarks on the cankerworm. In Mass. Agr. Repository and 

 Journ., v. 3, no. 4, p. 316-318. 



(7) Howard, Roland. 



1826. Canker worm. In New England Farmer, July 7. v. 4, no. 50, p. 

 393-394. 



(8) Herrick, E. C. 



1840. Parasite of the eggs of the elm-tree moth. In Amer. Journ. Sci. 



and Arts, v. 38, ser. 1, p. 385. 



(9) Harris, Thaddeus William. 



1841. A report on the insects of Massachusetts injurious to vegetation. 



459 p. 



(10) 



1854. Report on some of the diseases and insects affecting fruit trees 

 and vines. In Proc. Amer. Pomol. Soc, 3rd Session, p. 210-218. 



(11) Walker, Francis. 



1862. List of the specimens of lepidopterous insects in the collection of 

 the British Museum, pt. 26. Geometrites. p. 1696-1697. 



(12) Howard, Sanford. 



1866. The canker worm. In Practical Entomologist, v. 2, no. 1 (whole 

 no. 13), p. 6-7.' Reprint from Western Rural, June 23. 1866. 



(13) Packard, A. S. 



1869. Guide to the study of insects. 702 p., 651 fig., 10 pi. 



(14) Riley, C. V. 



1870. The canker-worm. In 2nd Ann. Rept. on the Insects of Missouri. 



p. 94-103, fig. 66-71. 



(15) Mann, B. Pickmax. 



1873. Anisopteryx vernata distinguished from A. pometaria. In Proc 



Boston Soc. Nat. Hist., v. 15 (1872-1873), p. 381-384. 



(16) 



1874. Explanation of the " Corrigenda," etc. In Proc Boston Soc. Nat. 



Hist., v. 16 (1873-1874), p. 204-209. 



(17) Riley, Chaki.ks V. 



1875. Canker-worms. In 7th Ann. Rept. on the Insects of Missouri, 



p. 80-90, fig. 14-18. 



(18) 



1875. On the differences hetween Anisopteryx pometaria, llarr.. and 

 Anisopteryx aoscularia, W.-V., with remarks on the genus 

 Paleacrita. In Trans. Acad. Sci. St. Louis, v. 3. 1868-1877, p. 

 573-577. 





