liihilcMj from slii[)[)iiii;', mid I i'iiiis[»(»i-UiLioii (••(inpaiiie.s fi-oiii carry- 

 ing clu'JslnuL slock iiol bearing Llic (Jomuiission's tag. Cliestuut 

 nursery stock sliipiied into Llie JSLute from without is to be held 

 at the border of tlie State for inspection. The nurserymen and 

 transportation companies of tlie State deserve credit for will- 

 ingly co-operaling wilii the ('ommission lo make this rcgnlalion 

 effective. 



A lield force of over thirty Jiien has been organized and tlie 

 extent of the blight in the State has been determined appi-oxi- 

 matel}^ The infected region in Pennsylvania occupies the east- 

 ern (wo-lirihs of I he State. The western-most line of general 

 advance may be shown by drawing a line from Susquehanna lo 

 \\'ilIiamsi)ort, and southward through Huntingdon to the soulh- 

 ern boundary of the State, although there are scattered spot in- 

 fections west of this to near the Ohio State line, in the south- 

 western corner of the State. The lield work done by the Com- 

 mission last summer and fall was largely scouting to locate the 

 extent of the disease. From January 15 to February 15, 1912, 

 1,352 infected trees on 87 tracts have been disjjosed of according 

 to the regulations of the Commission, and fully as many more 

 are in the process of removal. This is part of the work, in ad- 

 dition to general scouting and the holding of meetings for the 

 purpose of educational work on the part of the field agents. 

 During the summer months, when the work is carried on to the 

 best advantage, it is planned to increase the field force so that 

 the State may be thoroughly scouted and all diseased trees cut 

 out west of the advance line. 



On the advance line and to the westward, the owner of the 

 trees marked for removal is recinired to burn the bark from 

 visibly diseased or caidcerous portions of the trees, lie is also 

 required to destroy the bark of the stumps of infected trees, either 

 by peeling the bark to the ground line and burning it, or 

 by burning the brush over the stump until the bark is consumed. 

 Experiments are being tried to determine if it is not practical 

 to cover the stump with kerosene, crude petroleum, tar, or some 

 similar material, to nmke the destruction of the bark thorough 

 and less expensive. A trial shows that one man at this season of 





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