INSECT DEPREDATIONS IX NORTH AMERICAN I' Bl 



soon as it is felled and by converting the bolts into the smallest pi 

 ticable dimensions and piling them in such a manner as to facilil 

 rapid drying. 



Damage to unseasoned handle and wagon stock in the rough can be 

 prevented by taking special precautions to provide against the same 

 favorable conditions for attack as mentioned in connection with 

 round timbers. This is especially necessary with hickory and ash 

 if cut during the winter and spring. 



Damage to pulpwood and cordwood can be prevented to a great 

 extent by placing the -ticks of wood in triangular or crib piles im- 

 mediately after they are cut from the ti « iall v if the timber 

 it during the danger period or must be held for a few months 

 during the warm -eason. Peeling or splitting the wood, or both, be- 

 fore it is piled will also provide against damage from inse 



Manufactured Produi rs. 



UNSEASONED PRODI 



Freshly sawed hardwood lumber placed in close piles during warm, 

 damp weather in the period from July to September, inclusive, pre- 

 sents the most favorable conditions for injury by ambrosia beetles. 

 In all cases it is the moist condition and retarded drying of the lum- 

 ber which induces attack. Therefore any method which will provide 

 for the rapid drying of the lumber before or after piling will tend 

 to prevent loss. It is important, also, that heavy lumber should. 

 a> far as possible, be cut only in the winter and piled so that it will 

 be well dried out before the middle of March. 



The damage to lumber and square timber when the bark i- left on 

 the edges or sides can be prevented by removing the bark befon - 

 immediately after the lumber i- -awed, or by -awing and piling the 

 material (hiring the winter, or if sawed at other time- it should be 

 piled so that rapid drying will be facilitated. 



SEASONED PROIHc 



Unfinished seasoned products. — Injury by powder-post beetle- to 

 dry hardwood lumber and other material in stacks or storehouses can 

 be prevented a- follow- : 



(1) Have a general inspection of the material in the yard- and 

 storehouses at least once a year, preferably during November or 

 February, for the purpose of ( ") sorting out and destroying or other- 

 wise disposing of any material that shows the slightest evidence of 

 injury, a- indicated by the presence of tine powdery boring dust, and 

 (b) sorting out and destroying all old and useless sapwood material 

 of any kind that will offer favorable breeding places for the in-< i 



