Forest officers in charge of small sales should 

 plan to control any infestation in trees on government cut- 

 over lands or on the margins of these sale areas, first, by 

 cutting and burning the infested trees and, second, by fell- 

 ing trap trees on the margins of the sale area- These trap 

 trees shcnild consist of deformed, diseased or broken trees 

 and trees bad^r infested "'ith mistletoe. An3r broken trees 

 on the area or diseased or malformed trees which have been 

 missed in the marking should also be cut for trap trees. 



There are two seasons in which this trap tree cut- 

 ting should be done, one in the spring from March 1 to May 1, 

 and the other in the fall from September 1 to October 1. Trap 

 trees cut during the spring season must be burned before Sep- 

 tember 1 or the broods will escape shortly after that date. 

 As this is in the fire season it is preferable to fell trap 

 trees in September and biirn them the following spring before 

 April 1. If, in order to protect standing seed trees, it is 

 necessary to fell trap trees in the spring, additional trap 

 trees should be felled in the fall on or just before Septem- 

 ber 1, and these burned before April 1 of the following spring, 

 The number of trap trees to be felled will depend largely on 

 the number of infested trees on the area. The trap trees 

 should number about 25 per cent of the original infestation 

 and be as near the infested trees as circuns : :ances vill permit 



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