114 INSECTS INFESTING THE PEAR THEE. 



CHAPTER LVI. 



The Pear Tree Scale. (Cal.) 



(Lecanium pyri. — Schrank.) 



Synonym — Coccus pyri. — Schrank. 



Order, Hemiptera : } -c^ ^^ n 

 Sub-order, Homoptera; ( ^^^^^3^' Coccid^. 



[A light brown scale insect or bark louse, about half the 

 size of a pea, infesting the pear trees.] 



This species of scale insect can be found in several of the 

 fruit-growing districts of this State, and is injurious to the 

 trees infested by it. It is only found on the pear, so far as 

 known at present. 



NATURAL HISTORY. 



The insect is hemispherical, and is about the size of half a 

 pea. It is of a bright brown color, and oval in form ; the 

 upper surface slightly indented. Its longest diameter is from 

 one and one half to two lines ; the width from one line to one 

 and one half lines. Specimens sent me were received early in 

 June, at which date the young were hatching out. The eggs 

 are oval, and of a dirty white color ; number produced by each 

 female, from fifty to one hundred ; length, one eighty third of 

 an inch ; color, brownish-white ; antenna) and anal setse pres- 

 ent. In passing through the stages from the larva state to the 

 mature insect, at first the color is greenish-yellow, but changes 

 at the approach of maturity to a chestnut-brown, then to a 

 bright brown. 



After the eggs are'deposited the insect dies ; Fig.87>^. 

 then the scale or outer covering is blackish. 

 It is probable that there is only one brood in 

 each year. (See Black Scale.) 



Fig. 87-J^. Portion of a branch infested by 

 Pear-tree Scales ; at the right are two of the 

 scales — color, brown. 



Remedies. — When the tree is dormant, spray 

 thoroughly with Nos. 11 or 12. Or in Summer, 

 No. 4, or No. 5, or No. 7. For Summer wash 

 the latter are preferable, as the sulphur is an 

 enemy to fungi. 



