VI. The New York Plum Lecanium. 



{LeGanium, sp.) 



INTRODUCTION. 



The unusual outburst of Lecanium scale insects, which recently 

 occurred in Western New York, caused considerable alarm among 

 fruit growers in this locality. The insects were first noticed in 

 unusual numbers early in the season of 1894. At this time they 

 were found in abundance upon plum trees especially, although 

 other fruit trees did not escape attack. Their work was most 

 apparent, however, in several large plum orchards in the vicinity of 

 Geneva, Rochester and Lockport. At least two of these orchards 

 suffered very seriously from their attacks. 



Specimens of the new pest were sent to the Station from time to 

 time accompanied by letters of inquiry concerning a reliable remedy. 

 Prof. S. A. Beach, horticulturalist of the Station, thus having his 

 attention frequently called to it published a brief notice of the 

 unusual increase in Garden and Forest for July 18, 1894. 



Early in the following November, the writer was directed to 

 undertake a series of experiments with a view to determining a 

 practical method of combating the scale when occurring on plum 

 trees in injurious numbers ; the plan and results of the experiments, 

 together with such remarks concerning the life history and habits 

 of the insect as seemed desirable, to be finally presented in shape 

 for publication. The following pages contain the report. It may 

 be here added, however, tliat the work has been carried on during 

 four visits to Geneva during the year, which has made an accurate 

 study of all points in the life history of the insect more difficult 

 than might otherwise have been the case. 



Recent Publications Concerning the New Yokk Plum 



Lecanium. 



As above mentioned. Prof. S. A. Beach published a notice of the 

 alarming increase in the numbers of this scale in Garden and 

 Forest for July 18, 1894, giving a brief account of the life history 



