24 ■ The Bullethst. 



Likewise, if you fail to get the orchard treated in winter as intended, and 

 spring opens up with a lot of badly infested trees in the orchard, the very 

 worst ones should be cut out. 



It should be remembered that all through the late spring, summer and 

 fall, even until Christmas, or perhajjs later, the scale will be breeding, 

 and every wind or passing bird may carry away the young lice and estab- 

 lish them on new trees. This is why the trees which are already useless 

 should be destroyed — they cannot do good, and they do much harm by 

 spreading the scale. 



Fig. 7. — Same orchard as shown in Fig. 6, after being pruned and sprayed. Note that 

 all branches were shortened and that the trees are in thrifty condition. (Photo by 

 Sherman.} 



Late summer and fall, say from late August to middle of JSTovember, 

 is the season when the scale multiplies and spreads most rapidly. This 

 makes it especially important to take out whatever trees are going to be 

 destroyed before midsummer. 



There is one case in which we would advise destruction of trees that 

 might be saved. Suppose a man has an orchard of young trees and finds 

 only a very few trees badly infested. In such a case we may hope that 

 it has not spread far, and by promptly destroying those few trees — even 

 if they could be saved — and by thoroughly treating all the trees close by, 

 he may so check the scale as to avoid the need of fighting it on all his 

 trees for several years. But it must be remembered that the scale will 

 likely be more widespread than at first appears, so that close watch must 

 be kept for it in all parts of the orchard. 



But let us say again that we do not advise the destruction of trees 

 except in extreme cases. If you are in doubt whether or not to destroy 

 a tree, then spare the tree; but (and this is the important point) do not 

 fail to treat it thoroughly at the first suitable opportunity. 



