12*) 



A suitable insecticide measure is a thoroug-h spraying- with 

 kerosene emulsion diluted to contain five or six per cent, of kero- 

 sene, or with one pound of whale-oil soap dissolved in six g-ailons of 

 water, or with a tobacco decoction made by soaking- a pound of 

 tobacco in two <^alIons of water. Considerable force must be used 

 to bring- the spray in contact with all the insects, and many of them 

 will usually escape at best. 



As a prevention of injury to young trees in the nursery rows 

 the same applications should be made in early spring, commencing 

 when the hatching of the eggs is well under way. This process 

 begins with the first swelling of the buds, and an examination of 

 the tips of the twigs at this time will be sufficient to indicate the 

 precise time when the spraying had best be done. 



Thk Ciii<;in\*v Aphis. 

 {My: lis rr/'ds/.) 



This is .1 bUick plaut-lou^e (Fig. 15) occurring on the ch crry 

 in early spring as soon as the leaves are fairly started. It hatches 

 from eggs left on the twigs and buds the preceding fall. It con- 

 tinues to multiply throughout the year, being usually most abun- 



l'"i<;. 15. riii'". Ciii'.KKY Ai'iiis, wingless and winged individuals. (Weed.) 



dant, however, in spring and in fall. If it occurs in fall on nursery 

 stock which is to be marketed that season, it should be killed by 

 spraying in September or early October, before the eggs have been 

 laid. 



TiiK Lkai''-ckumi'i,i<;k. 



{M/uro/d iiidii^i)iclla. ) 

 This insect (Fig. 16) is particularly injurious to nursery stock 

 and young orchard trees, owing to the fact that it hibernates upon 

 the infested tree as a half-grown larva and attacks the young 



