Show REPORT MIGRATION WOOLY APHID ELM LEAF CURL APPLE special economic discovery nursery stock young general account serious widespread pest seedling apple colony progeny leaf curl leave elm spring everywhere familiar apple bark elm genera known apple post along few back ordinal food Inal ret ere des essential original food plant plant plane occur fall de continuation species bulletin maine agricultural experiment report aphid elm leaf apple special economic discovery nursery stock young general account serious widespread apple post aphid worldwide world wide serious insect young apple apple tipple 1911 1911 1011 lao therefore slight maine maine blaine agricultural experiment station ascertain point life cycle pest discovery cycle known elm leaf curl borne distinct name live fact familiar family certain upon food plant produce different species plant sum where series fall pro second migrant plant here true occur winter egg aphid apple migratory species distinct food elm every per cent est once apparent nursery stock 20 per cent 25 per cent aphid twenty forty million american grown apple am country co fe station posit egg 13 spring apple elm leaf curl where itself hark hark bark during thin addition tall tall fall tall fall tail winter apple led assume apple apple tipple alone con life cycle pest elm leaf curl wolf upon economic status elm curl aphid apple species cannot continue without access elm put glow dan elm self except case young great put put nut put nut rut discovery annual fresh fresh froth infestation elm apple knowledge elm life cycle |