8 MAINE AGRICULTURAL EXPERIMENT STATION. 



Tarnished Plant Bug, Lygus pratensis. 

 Oyster-shell Scale, Lepidosaphes ulmi. 

 San Jose Scale, Aspidiotus perniciosus. 

 European Fruit Scale, Aspidiotus ostreaeformis. 

 Scurfy Scale, Chionaspis furfura. 



, Phenacoccus dearnessi. 



Fruit Lecanium, Bulecanium corni. 



, Pulvinaria vitis. 



Aphids : Woolly, Schizoneura lanigera; green, Aphis pomi; 

 Rosy, Aphis pyri. 



Woolly Aphid of the Apple (Schizoneura lanigera). 



This serious pest of apple trees was discovered by us to be a 

 migratory aphid dependent upon the elm for a part of its life 

 cycle, which is passed in deformed leaves of the American elm. 

 This discovery enables apple nurseries to protect their young 

 trees by excluding the elm from their vicinity. 



Green Apple Aphid (Aphis pomi). 



Beside the work of the Plum Cuculio a second common cause 

 of deformed apples in Maine has been ascertained by us to be 

 the green apple aphid. This insect is guilty of much of the 

 pitted fruit, often crippling the total crop of an orchard. Black 

 leaf 40 spray is effective. 



BORERS. 



Descriptions, habits, figures and standard remedies for the 

 following apple borers of Maine have been published by this 

 Station : 



Round-headed Apple-tree Borer, Saperda Candida. 



Flat-headed Apple-tree Borer, Chrysobothris femorata. 



Shot Borer, Xylehorus dispar. 



SPRAYING FOR INSECTS THAT EAT THE FOLIAGE. 



Almost continuously since 1891 the Station has conducted 

 work looking to the control of insect pests by spraying with 

 arsenical poisons. When this was begun there was very little 

 spraying in the State. The first work compared London Purple 



