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liibited from shipping, and transportation companies from carry- 

 ing cliestniit stock not bearing the Commission's tag. Chestnut 

 nursery stociv shipped into the {State from without is to be held 

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

 transportation companies of the State deserve credit for will- 

 ingly co-operating with the C'ommission to make this regulation 

 effective. 



A field force of over thirty men has been organized and tlie 

 (ixtent of the bliglit in the State has been determined approxi- 

 mately. The infected region in Pennsylvania occupies the east- 

 ern two-fifths of the State. Tlie Avestern-most line of general 

 advance may be shown by drawing a line from SuH<inehanna to 

 W'illiamsport, and sonthwavd through Huntingdon to the soutli- 

 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. Tlie field 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 disposed 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 ]jart 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 Avestward, the owner of the 

 trees marked for removal is required to burn the bark from 

 visibly diseased or cankerous portions of the trees. He is also 

 recpiired to destro}^ the bark of the stumps of infected trees, either 

 by ])eeling 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 stumj) with kerosene, crude petroleum, tar, or some 

 similar material, to make the destruction of the bark thorough 

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



