2l8 



The Canadian Horticulturist. 



soil, well exposed to the sun, this coloring is heightened still more. Berberis 

 Thunbergii is a variety introduced from Japan by the botanist Thunberg. It 

 forms a dense graceful bush about three feet high and of rounded form. It is a 

 most pleasing ornamental shrub with its bright red bark, its fruit which hangs 

 throughout the winter, and its beautiful foliage in summer. 



SOME DESTRUCTIVE INSECTS. 



-^^S^HE above is the title of Bulletin 68 of The Ohio Experiment 

 Station, in which some destructive insects are well treated of. 



The Canker Worvi, one of them, is a very old one in Cana- 

 dian orchards, which for some years past has been stripping 

 some apple orchards east of Hamilton, to such an extent as to 

 leave not a vestige of foliage. Mr. Orr, who is superintendent 

 of spraying operations in Ontario, says this insect is wide spread and very 

 destructive. 



For the benefit of any readers who have never become acquainted with 

 this insect we give the accompanying illustration, showing {a) a cluster of eggs, 

 {b) some of same magnified ; these hatch out as the leaves expand in the spring, 

 into the well known measuring worm {c) which when disturbed drops quickly 

 and hangs by a thread. If a tree is badly infested a smart knock will bring 

 down hundreds, hanging by as many threads, ready to crawl back and continue 

 their work of destruction. When full-grown the worm drops by the thread to 



Fig. 966. — The Cankek Worm. 



the ground, and burying itself three or four inches below the surface forms a 

 tough, buff colored cocoon {d) within which the chrysalis lies hidden till 

 spring. Emerging with the first warm weather, the female moth {g) which is 

 wingless, climbs the trunk of- the nearest apple tree, awaits the company of the 

 male (/) which is winged, and then proceeds to lay the eggs as first described. 

 Formerly the wingless female suggested the simple method of protecting the 

 tree by bands of some sticky substance as practiced most faithfully by the writer 

 about twenty years ago, when his orchard was attacked by this worm in great 

 numbers. But since adopting the spraying with Paris green, no other means of 



