Insect and Disease Control 247 



Life history and habits. 



Tlie adult emerges from the ground the last of May or 

 early in June in Connecticut. Most of the eggs are laid 

 subsequent to the middle of June, being deposited on the 

 under side of the leaves. They hatch in about six to eight 

 days. The larva eats out a narrow strip from the edge of 

 the leaf, working towards the center in such a way as to 

 permit the making of a case for itself. In this the larva 

 remains during the day, feeding mostly at night. 



The larva reaches maturity in about ten days and then 

 enters the ground to pupate. There is but one generation 

 in a season. The amount of damage is in proportion to 

 the abundance of the insects and the consequent defolia- 

 tion of the trees. 



Method of control of saw-fly. 



In commercial orchards this insect has been well con- 

 trolled by spraying with arsenate of lead just after the 

 eggs hatch. It is suggested that 2 pounds of the poison to 

 50 gallons of water would probably be sufficiently strong. 

 However, when arsenate of lead is used on peach foliage 

 in water as a conveyor, rather than in a fungicide contain- 

 ing lime, the latter should be added at the rate of 2 to 3 

 pounds for every 2 pounds of the poison in order to pre- 

 vent burning the leaves. 



Brown-mite (Bryobia pratensis) 



This is a very minute insect, as its name suggests. It has 

 various host plants and in some sections does considerable 

 damage to peaches, though as a peach insect it is not widely 

 recognized as a serious cause of injury. 



