22 



INSECTS AFFECTING THE CHERRY. 



The Cherry is affected by a number of the insects already considered 

 in connection with other fruit-trees. The Pear-tree Slug is quite as 

 abundant on the leaves of the Cherry-trees as on Pear-trees ; the Plum 

 Curculio attacks the fruit, often very severely; the Tent-Caterpillars, 

 Fall Web-worm, Tussock-moth, Canker-worms, Eye-Spotted Bud-moth, 

 Leaf-rollers and Casebearers all devour the foliage ; and the scale insects 

 suck the sap and lower the vitality of the trees. In addition to these 

 formidable enemies attention may be drawn to 



Fig. 35. —Lady bird beetles. 



Fig. 36. — A.phis-lion and 

 its eggs. 



Fig. 37. — Eggs and larva 

 of Aphis-lion. 



The Cherry Aphis (Myzus cerasi). This insect differs from most >f 

 the plant-lice in being black instead of the usual green color. It often 

 appears on the leaves at the ends of the boughs in enormous numbers, 

 causing the leaves to curl up and arresting further growth. The struc- 

 ture and habits of this species are similar to those of the Apple Aphis ; A 

 passes the winter in the egg state on the twigs of the tree. The remedies 

 already mentioned are effective in this case also, and should be applied as 

 soon as the first colonies are noticed. Usually the presence of the insect 

 is not observed until it has become very numerous and the terminal leaves 

 all over the trees are affected. Lady-bird beetles (Fig. 35) and Aphis- 

 lions (Figs. 36, 37) are usually to be seen feeding voraciously on the 

 plant-lice and assisting very materially in the reduction of their numbers. 



INSECTS AFFECTING THE PEACH. 



The war against injurious insects is almost heart-breaking to the 

 peach-grower, as the special enemies of this tree make such serious 

 attacks upon it and its less robust constitution causes it to succumb much 

 more readily than the sturdy apple and other fruit trees. _ It is particu- 

 larly unfortunate, therefore, that the San ]osl> Scale should have become 

 established in those southern counties of Ontario where alone the peach 

 will thrive. This deadly insect should be constantly watched for and 

 the prescribed treatment applied as soon as the proper time has arrived. 



