INSECT ENEMIES OF WESTERN FORESTS 



43 



Late May 



Pupae transform 



to the adult 



stage. 



April-MidMay 



Pupation 



takes place in cell 



in the wood of 



infested 



tree. 



June 



Weevils emerge from infested trees, mate, 



and attack living seedlings. 



Emergence holes 



in abandoned 



seedling. 



July 



Females lay eggs 



in cortex of twigs 



and stem. 



LIFE CYCLE 



of 



CYLINDROCOPTURUS 



EATONI BUCH. 



IN 



PONDEROSA AND 

 JEFFREY PINE 



August-March 

 Larvae mine in 



the phloem 



and outer wood; 



over-wintering in 



pupal cells. 



Figure 16. — Life cycle of the pine reproduction weevil (Cylindrocopturus 

 eatoni) in ponderosa and Jeffrey pine. 



white or bronze scales. In feeding- they use their long beaks to 

 puncture the needles and the thin bark on stems and twigs. The 

 eggs are laid singly in punctures in the outer bark of living stems 

 and twigs; the larvae feed through the outer and inner bark and 

 when mature late in. the summer, they bore into the wood and 



