F-519567 
STA 
the 
aser fir killed by 
ooly aphid, Adelges 
EXPT 
of 
pine bark aphid, Pineus strobi, 
Infestation 
on the trunk of pine. 
the balsam w 
COURTESY CONN. AGR. 
Don 
piceae. 
FIGURE 22.—Fr 
FIGURE 
poopy s-nsamataens ips sels gin eae 
Sy Knee + 
«\ , 
Reranas cere == NT OM Ct Ce Re 
PT Tn a ae ee ek Na A Me Oe ee a ee 
ee Pa re / OCR AT NH if é Va ae ES Deh 4 
* A \ See SO las: “age QS) zd RAY aie J teal VO bm ; 
VGN GER ee at 
Ve 
90 
