74 AGRICULTURE OF MAINE. 



It will be noted in the above table that 86 trees and shrubs 

 were condemned and i/oo raspberry and blackberry plants 

 held in quarantine until treatment should be applied and the 

 pest controlled. The canes of these plants at Eliot were seri- 

 ously infected with scale insect commonly known as the rose 

 scale (aulacaspis rosae.) This scale is easily controlled by 

 the use of kerosene emulsion, repeated at intervals, and the 

 certificate was withheld until the pest should be entirely con- 

 trolled. Untreated, the pest is certain to materially afifect the 

 growth and production of fruit and new canes. 



The trees and shrubs which were condemned were destroyed 

 at once. The cause of condemning was in nearly every case 

 lack of vigor, caused by oyster-shell scale, borers, canker, or 

 general neglect. 



Other pests discovered in this inspection work include the 

 i-aspberry cane borer. These were found to be very abundant 

 in many localities and while not serious enough to make it 

 necessary to quarantine the plants, a circular letter was sent to 

 each of the growers outlining the method of control. This 

 consists of the simple operation of picking and destroying the 

 tips of the canes as soon as the drooping leaves indicate the 

 presence of the borer. 



Red rust on blackberry plants was located in some places. 

 This disease, while as yet not common," should be destroyed as 

 soon as discovered. It is a fungous disease attacking the under 

 side of the leaves, and the canes to some extent, forming a 

 waxy growth, reddish in color, and causing the foliage to turn 

 yellow. Spraying with fungicides helps to prevent its appear- 

 ance but does not control it when once established. All infected 

 plants should be burned. 



The pine tip moth borer was found to be doing some damage 

 in nurseries of the white pine. Its presence is indicated by the 

 dying of the tender temiinal shoots. Examination shows the 

 little borer working in the wood under the bark. The infested 

 portion should be cut off and burned. Of course the affected 

 tree is made worthless for ornamental purposes so that a close 

 watch should be kept to prevent the spread of this pest. 



The caterpillars of the mourning cloak were found in many 

 of the nurseries of poplar and willow trees. The arsenical 



