THE PRINCIPAL INSECTS LIABLE TO BE DISTRIBUTED ON 



NURSERY STOCK. 



INTRODUCTION. 



In preparing this descriptive catalogue of tlie insects liable to be 

 transported upon nursery stock, it has appeared that there is a great 

 disparity of views as to what insects should be included. To include 

 only such as are known to be very destructive would exclude a great 

 many species that will be found by anyone who examines a tree in the 

 fall or early spring. To include all the species that are known to be 

 found in any stage upon fruit trees in wmter would make the list too 

 bulky. Therefore, all species known to be of more than local interest 

 have been treated. Notes on the species infesting fruits are added at the 

 end. The insects have been arranged according to their natural orders, 

 and in the Hemiptera (bugs, scale insects, plant-lice) according to the 

 families. In the Coleoptera (beetles, weevils) and Lepidoptera (but- 

 terflies and moths), such an arrangement did not seem desirable. No 

 account of the remedies to be recommended or used is given, as these 

 differ greatly, according to locality and conditions, and the various 

 State laws specify certain treatments. 



It will be a great help to those interested in the growth and sale of 

 young fruit trees to be able to recognize the appearance of the various 

 insect pests during the winter; therefore, much attention has been paid 

 to this phase of the subject. 



In using this bulletin one should remember that, besides the insects 

 here treated, there may be upon a tree other insects of less importance. 



TABtTLAK. STATEMENT OF IITSECTS UPON THE TREE IN -WINTEB. 



Insects upon the roots: 



Forming swellings on apple roots Woolly aphis. 



On peach and plum roots Black peach aphis. 



Insects upon the bark of trunk or branches: 



Plant-lice or aphids . - Woolly aphis. 



Small brown clear- winged insect in the crevices of bark Pear psylla. 



Scale insects or bark-lice See Coccidije. 



Caterpillars in cases or cocoons Fall webworm, bud moth, apple 



Bucculatrix, codling moth, pistol-case and cigar-case bearers. 



In nests or bunches of shriveled leaves attached to branches Leaf -cruni pier, 



and brown-tail moth. 



