54 MISC. PUBLICATION 273. U.S. DEPT. OF AGRICULTURE 



w&r 



V,-." f«< *• V ■'.-/ 3. U 



^A^-Wf rv 



ms 



« j 



mM " - 





y^»'ifciiL* .J.;,; .;,.,:> 



Figure 21. — The cypress twig moth (Laspeyresia cupressana.) and its work 



in Monterey cypress: A, Adult, X 2.25; 5, eggs X 2; C. larva, 

 pupa, X 3.75. (Drawings by Edmonston.) 



D. 



•" g inch. The caterpillars, which are slender and grayish-white, 

 bore into fresh green cones and into the bark of trunks and limbs 

 of Monterey cypress in California. Usually the attack is made at 

 the forks of branches or at points of injury. It causes an exudation 

 of resin and deforms or kills the affected part. In this work it 

 probably plays a part secondary to that of a tree-killing bark 

 disease, Corynetim cardinal e. 



BUD MOTHS 



Frequently the tips of branches on young and older trees appear 

 to be killed, but close examination reveals that the twigs are not 

 injured and the damage is confined to the buds, developing needles, 

 or terminal leaves. These are webbed together to form a case, 

 within which a smooth, hairless, very active caterpillar is found. 

 Work of this character is done by a group of bud moths, mostly 

 belonging to the family Tortricidae. which are true leaf eaters and 

 therefore defoliators (p. 102). Usually their damage is confined 



