2. From evidence at our command it 

 would appear that these infestations 

 came from Wisconsin (in the case of 

 Nursery A this is an estabhshed fact). 



3. Our state forest service estimates 

 that there is approximately twenty-five 

 billion feet of merchantable white pine 

 standing in Minnesota, worth about 

 twenty-five millions of dollars. Thou- 

 sands of young white pine trees are 



■5 annually planted in an efi'ort to reforest 

 our denuded timber lands. Is Minnesota 

 willing to allow this menace to go un- 

 checked ? 



4. The tardy development of this 

 disease in pines makes the proposition 

 of eradication a difficult one, calling for 



^ survey and inspection year after year for 



a long period. 



.1. As far as inspection and eradica- 

 tion in Alinnesota nurseries is concerned, the State 

 Inspection Service can handle the work, provided 

 enough funds are available, but more extensive po- 

 lice power should be granted the State Entomolo- 

 gist to cover this emergency. He should be em- 

 powered to destroy all suspected trees and bushes 

 wherever found whether the disease is apparent or 

 not and to prohibit the entrance into Minnesota and 

 transportation within this state of any of the five- 

 leaf pines. This additional police power of State 

 Inspectors is urged in a recent bulletin issued by 

 the Bureau of Plant Industry, U. S. Department 

 of Agriculture. 



6. Nurserymen, Park Commissioners, and citi- 

 zens generally should appreciate the seriousness of 

 the situation and should refrain from buving or 

 planting white pine for a number of years. If any 

 five-leaf pines on their premises appear to be dis- 

 eased they should communicate at once with the 

 Experiment Station. Currants and gooseberries are 

 best planted at a distance from five-leaf pines. 



Fig. 6. Sketch of St. Croix River from Afton to the upper dam, the 

 area covered by our survey on Minnesota side. Crosses 

 at Dry Creek, Taylors Falls, Pine Hollow Creek and Lake- 

 land mark the four affected localities found this summer. 



