June, '09] JOURNAL OF ECONOMIC ENTOMOLOGY 239 



the emergence of the pink fusiform larv« from the apple for eoccoon 

 spinning, and in one instance gave 24 days from the time the larva left 

 the apple to the appearance of the adult moth, with an average actual 

 pupal period of 12 to 16 days. 



The total life cycle of the lesser apple worm was found to be ap- 

 proximately the same as for the codling moth. Eggs of the lesser 

 apple worm obtained in the orchard on June 19 hatched June 22-23. 

 These yielded an adult moth AugiLst 7-8, or a period of 45 to 47 days 

 from egg hatching to adult, which, with the addition of the time spent 

 in the egg, places the total life cycle from egg laid to adult moth at 

 approximately 7 weeks. 



Apples were collected in the orchard on June 10 and placed in cages, 

 Avhich yielded an adult between July 11 and July 13, so it is quite 

 probable that eggs of Enarmonia prunivora were already being laid 

 in the orchard late in ]\Iay. at which time apples of standard winter 

 varieties measured from 1 to 114 inches in diameter. At this date 

 eggs of the first generation codling moth were numerous. Since many 

 of these first generation lesser apple worms do not enter at the calyx, 

 but at the stem or side, an arsenical spray seems to be necessary when 

 the apples reach the size indicated. As applications at about this 

 time are also necessary against the curculio and the larva? of the cod- 

 ling moth, which enter the apple at other places than the calyx, special 

 sprays against the lesser apple worm other than those aimed at cur- 

 culio >and codling moth do not seem at this time necessary in Mis- 

 souri. The eggs of Enarmonia prunivora are, according to the writ- 

 er's observation, laid a few days later than those of the codling moth, 

 and this fact, in cases of great abundance of the lesser apple worm, 

 would somewhat emphasize the importance of a spray at this partic- 

 ular time. 



ARSENICAL POISONING OF FRUIT TREES 



By Wm. p. Headdex 



There appeared in the April number of this journal an article by 

 Dr. E. D. Ball under the title "Is Arsenical Poisoning Killing Our 

 Fruit Trees?" An address on this subject by Dr. Ball appeared in the 

 Desert Farmer of February 27, of which the present paper is an ab- 

 stract. Subsequent to the publication of the address Doctor Ball wrote 

 to me disclaiming the personalities in the article in the following lan- 

 guage : ' ' This article is intended to be in no way personalh' contro- 

 versial" . . . and in closing he adds, "Trusting that you will 



