50 AGRICULTURE OF MAINE). 



to quite mature trees. One special example was noted of a 

 tree about 30 years old that was completely alive with the snowy 

 covered aphis — roots, branches and small twigs. No attempt 

 had been made to control the insect and it had secured complete 

 mastery of the situation. The tree died that season. The air 

 was full of the mature winged females so that, in all probability, 

 the pest was spread to many other trees in the immediate vicin- 

 ity. We have been asked many times if the woolly aphis, found 

 so abundantly on the alder, was the same species. It is an 

 entirely distinct species and cannot live on the apple. 



When this apple aphis occurs above ground, on the twigs and 

 branches alone, it can be easily controlled by the same treat- 

 ment that is given to the green aphis, viz., kerosene emulsion. 

 In fact, it is less difficult to handle, as it does not attack the 

 leaves but is exposed on the trunk or branches. Often it is 

 found in the scars left where limbs have been removed and 

 sometimics in seams in the bark. In these cases care should be 

 taken to thoroughly spray with sufficient power to force the 

 material into these cavities and thus touch each specimen. 



GREEN APPEE APHIS. 



(Aphis pomi.) 



The small green louse of the apple was one of the worst pests 

 to the young trees set this year ; this was especially true of the 

 Gregory orchards. 



The first brood hatched from the eggs that were already on 

 the trees when they were set. These began their work in June 

 and kept it up until late fall. 



This pest is one of the most difficult to handle on account 

 of the protection they have from the curled-up leaves in which 

 they arc at work. The eggs are laid in the fall and are so 

 minute that they usually pass unnoticed. As the trees leave 

 out they appear free from any insect pests, so the orchardists, 

 in attending to other duties, pass them by without much inspec- 

 tion. About that time, though, the little green fellows have 

 begun their work and are busily sucking the sap from the under 

 sides of the tender leaves ; this causes the leaves to curl up to 

 such an extent that the edges often touch, completely protecting 

 the little fellows from injury. As they are sucking insects the 



