584 Agricultural Experiment Station, Ithaca, N. Y. 



Saturday, May 11. "Discouraged; even in Plot I. nine-tenths 

 of the worms are in good liealth.-' 



• Monday, May 13. " Feeling better. Kine-tentlis of the worms 

 on Plots I. and II. are dead. Plot III. gives fairly good results, 

 over half the worms being dead. Plot IV. about half the worms 

 dead. Plots V. and YI. show few 

 dead worms, although the results 

 are passably good on the limbs 

 which were very heavily sprayed." 



On the 13th, most of the flowers 

 were open, and the largest worms 

 had reached the length of an inch. 

 At this time, every green thing on 



the untreated trees, and on manv of the treated ones, was 

 alive with the industrious worms, which made great pre- 

 tense of being offended whenever their feeding-places were 

 in the least manner disturbed. The unwary visitor who 

 jarred a limb would instantly find a web of the squirming 

 and grotesque creatures swimming about his head, as the 

 larvae dropped on their gossamer threads. Some of the less 

 active individuals would remain upon the leaf, but would 

 assume every manner of pose of which the insect nature is 

 capable. Some of the worms would project themselves 

 rigidly into the air whilst hanging on with one extremity, 

 like so many shingle-nails driven into the leaves. 



Others hunch up their backs into a loop, and still others 

 lie motionless upon the leaf. The greater number of the 

 worms let go, however, when they are suddenly disturbed 

 and drop instantly from one to three feet, letting out a 

 thread as they go, at the end of which they hang motion- 

 less for a time, as if enjoying the utmost serenity of mind. 

 Sometimes an individual lets go again from the end of his 

 thread and drops another notch ; and this operation may be 

 repeated two or three times. If the disturbance passes, in 

 a few minutes the worm ascends the rope. Figs. 135 and 

 136 are characteristic illustrations of specimens secured in 

 Scott's orchard. 1.35— The 



Although the Paris green was plainly killing the worms, canker 

 it was soon apparent that more than ordinary measures 



worm. 



