Soon after this small mill started operations in second-growth pine in California, 

 bark beetles began competing with it for trees. The red-brown trees in the back- 

 ground are infested and dying; some can be sawn into lumber, but blue stains 

 will lower their value. Spread of the beetles can be checked by burning the bark 

 and using toxic oils and proper disposal of slash. Below: To protect a new crop of 

 western white pine in St. Joe National Forest, Idaho, from blister rust, a crew 

 grubs out ribes gooseberries and currants which are the hosts of blister spores. 

 The crew works in lanes marked by string to assure complete coverage of the area. 



