36 BULLETIN 1238, U. S. DEPARTMENT OP 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 larvse 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 Dandkidge. 



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) Atwater, Noah. 



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



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



(4) Peck, William Dandeidge. 



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 

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(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. Pickman. 



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. 



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(17) Riley, Charles V. 



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



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



(18) 



1875. On the differences between Anisopteryx pometaria, Harr., and 

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

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 573-577. 



