54 MONTANA EXPERIMENT STATION 



REPORTED INJURIES TO FOREST TREES. 



Late in the winter or early in the spring oi 1909 extensive areas 

 of forests in the mountains m Montana showed plain indications of 

 injury to the foliage. Two trips on horseback were made into the 

 mountains for the purpose of determining whether or not insects 

 were in any measure responsible for the injuries. Professor D. B. 

 Swingle, Botanist and Bacteriologist to the Experiment Station, 

 also examined the trees to determine if the trouble was due to veg- 

 etable organisms. We were unable to obtain evidence that insects, 

 fungi or bacteria were concerned in the difficulty. 



We believed that the killing of the foliage on the pines and 

 firs was due to weather conditions. 



Quite independent of this difficulty, certain forest insects 

 caused some injury in restricted areas. 



PUBLICATIONS AND PUBLIC ADDRESSES. 



The principal publications and addresses of the year, not in- 

 cluding some short newspaper articles, are the following: 



"Notes on the Ten-lined Potato Beetle in Montana," a paper 

 given at the annual meeting of the American Association of Econ- 

 omic Entomologists at Boston, Decemiber, 1909, and to be publish- 

 ed in the Journal of Economic Entomology. 



"Notes on Spraying Experiments for the Oyster Shell Scale in 

 Montana," a paper read at the annual meeting of the Annerican 

 Association of Economic Entomologists in Boston, December, 1909, 

 and published in the Journal of Economic Entomology. 



"Insect Life," a paper of six thousand five hundred words read 

 before the Great Falls high school, November, 1909. 



"Insects in Relation to the Spread of Human Disease," an ad- 

 dress delivered before the Billings, Big Timber, StevensvUle, Fort 

 Bienton and Havre high schools. 



"Photomicography of the Diaspinae," a paper read before the 

 December (1908) meeting of the American Association of Economic 

 Entomologists, held at Baltimore, Md., and printed in the Journal 

 of Economic Entomology, April, 1909. 



"Seventh Annual Report of the State Entomologist of Mon- 

 tana," the present report. 



