170 AGRICULTURAL EXPERIMENT STATION. 



Eggs — We do not know the eggs of this species but presume they 

 are laid by the moth on the twigs or terminal buds and hatch early 

 in the spring. 



Larva — Three-fourths of an inch long, cylindrical, naked, pale 

 dull brown, body bearing warts from which arise fine short hairs; 

 head and top of next segment black. The larva occupies a dry 

 blackened leaf, portions of which are drawn together so as to make 

 a case which is lined with silk. Withiu this case the larva changes 

 to a dark brown chrysalis in June. The larva is shown in Fig. 21. 



LIFE HISTORY. 



Eggs laid on the terminal buds or twigs in the summer arid 

 remains until the next spring hatching about the time the leaves 

 expand. The larva attack the terminal leaf clusters, flower clusters, 

 young fruit or twigs and feed upon them until full grown in June 

 when they spin a cocoon within the case and emerge the perfect 

 moth earlj- in July, completing the life history. 



REMEDIES. 



Hand pick the clusters of injured leaves which can readily be seen 

 on the trees in June, being changed in color, drawn together by 

 silken threads. Spraying the trees, for the codling moth would 

 probabl}^ destroy this insect. 



THE APPLE-TREE APHIS. 



Aijliis mali, Fabr. 



Several complaints have been received the past season of depreda- 

 tions by the above species, and we judge it is quite widely distributed 

 in the State. It is an insect that feeds upon the juices of the foliage 

 and when at all abundant must seriously affect the vitality of the 

 tree This insect was originally from Earope, but is now a pest in 

 apple orchards throughout the Northern United States and Canada. 

 Perfect insect {male) head, thorax and autense black, neck usually 

 green ; abdomen, short, thick, oval, bright green ; sides with row of 

 black dots ; nectaries and tail- like appendages black ; wings trans- 

 parent with dark brown veins. The winged female resembles the 

 male in color. Perfect insect (wingless female) — length less than 

 one-tenth inch ; body oval, pale 3'ellowish green, often striped with 

 deeper green ; eyes and tail appendages black ; honey tubes green. 



