134 AGRICTILTUEAL 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 earlj' 

 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. Within 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 and 

 remain until the next spring, hatching about the time the leaves 

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

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

 when they spin cocoons within the cases and emerge perfect moths 

 early in July, completing the life history. 



REMEDIES. 



Hand pick the clusters of injured leaves which can readil}- be seen 

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

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

 probably destroy this insect. 



THE APPLE-TREE APHIS. 



Aphis 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 Europe, but is now a pest in 

 apple orchards throughout the Northern United States and Canada. 

 Perfect insect {male) — Head, thorax and antennae 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 

 males in color. 



Perfect insect (wingless female) — Length less than one-tenth inch ; 

 body oval, pale yellowish green, often striped with deeper green ; 

 eyes and tail appendages black ; honey tubes green. 



