COMMISSIONEE OF AGRICULTURE 247 



SPECIMENS 



San Jose Scale on Wood and Apples Fire Blight 



West India Peaoh Scale Black Knot on Plum 



Oyster Shell Scale 



Scurfy Scale Colored Plates 



Peach Yellows Potato Wart Disease 



Chestnut Blight Gipsy Moth 



Apple Scab Brown Tail Moth 



Red Bug Work on Apples Bulletins 



Apple Maggot in Apples 41. Wart Disease of the Potato 



Poplar and Willow Borers Emergency Bulletin on the Blister Rust 



Bronze Birch Borers of Pines 



Large Poplar Borers Cir. 58 "Formulas 



Shot Hole Borers Cir. 112 Tent Caterpillars 



Hairy Root Cir. 62 



Crown Galls Cir. 87 



Aphis Galls Cir. 64 



Blister Rust on Pine Cir. 97 



Blister Rust on Currant Foliage Cir. Ill 



Powdery Scab on Potatoes (in jar) Cir. 118 



Stalks Affected with Black-Leg (in jar) Cir. 68 



Tubers Affected with Black-Leg (in jar) Cir. 61 



Work of Pine Shot Moth U. S. Bui. 564, Gipsy and Br. Tail 



Egg Masses of Tent Caterpillar Cir. Letter on Grasshoppers and Control 



Hickory Bark Beetle 8 Photos of Diseased Potatoes 



BLISTER RUST OF THE PINE 



The discovery of this disease in 1906, and the subsequent im- 

 portations of young white pine seedlings in 1909, caused much 

 alarm among growers of the white pine. This species is one of the 

 most valuable of all our natural forests. In recent years strenu- 

 ous efforts have been made by State foresters and others to induce 

 owners of lands that are not adapted to other agricultural crops to 

 reforest with pine and other trees. The efforts of those interested 

 were successful in awakening a broad interest in the matter, and 

 extensive plantings were made throughout the State. Therefore 

 a serious problem confronted all interested when this destructive 

 European disease appeared. 



The Federal Horticultural Board of the United States Depart- 

 ment of Agriculture prohibited the importation of all so-called 

 five-leaf pines into the United States, thus cutting off the main 

 channel through which the disease was spread. Nevertheless it has 

 been found in several sections of the country, but the statement 

 has been made that it has not been known to be present west of 

 Buffalo. The latest reports show that it appears in three localities 

 in New Hampshire, two in Vermont, ten in Massachusetts, two in 

 Connecticut, five in New York, one in Pennsylvania, and three in 

 Ontario, Canada. 



Since the disease was discovered in this State efforts have 

 been made to stamp out the infection. These efforts were very 



