Unibersfitp of Elaine. 



ORONO 



BULLETIN No. 203 



AUGUST, 1912 



ELM LEAF CURL AND WOOLLY APPLE APHID, 



This bulletin contains a report of the migration of the woolly aphid 

 from elm leaf curl to apple, with special reference to the economic 

 significance of this discovery for nursery stock and young orchards. 

 A general account of this serious and wide spread apple pest is included. 



