564 



NEW JEKSEY AGIUCULTUEAL COLLEGE 



The Elm-Leaf Beetle. 



This ins(X't, after a series of years during \vhioh litrlo Avas seen 

 of it in Xew BrnnsAviek, recovered its ground during the season of 

 1905, Avhich was fa^'orable to it, and great numbers of the adult* 

 Avent into hibernating quartei*s in good condition. This fact noted 

 led to the Kdief that it might prove injurious in 1006, and prepa- 

 rations were made for spraying the trees on the college c^impus in 



ing. 31. 



Elin-leaf Beetle: d. «, pjitehes of ejrg?: on leaves: b. larva? foeiling; c. adult: all natural size: 

 egc ma« ; ;". surfaoe of egg : <7. larva : K i. larval details : J. pupa : k, bet.Hle : I. surface of elytra : 

 enlarged. "From Kept. Em., l'. S. Dept. Agl. 



the spring of 1000. With the unfolding of the leaves the beetles 

 appeared in nnmbei*s, and as soon as the tii'st egg clustei"s appeared 

 the trees were thoroughly sprayed with arsenate of lead at the rate 

 of about iive pounds in one liundred gallons of water. The object 

 was to kill off as many of the adults as possible before they had a 

 chance to oviposit, and this was very largely accomplished. On 

 some favorite trees, however, so many egg elustei's were found that 



