era. Phylloxera vastatri.v, specimens of tlio latter being sent us from 

 both wild and cultivated vines at Albert Lea. This latter pest has 

 been present with us on wild vines for some time, and in the event of 

 its becoming aljundant on cultivated plants, may call for strenuous 

 action on the part of the grape grower. It is a form of louse which 

 works on both roots and leaves of grape vines, and has called for 

 special legislation in some countries. 



The Codling Moth and Plum Curculio have, as usual, been busy 

 on apples and plums, as well as two or three species of plant lice, and 

 we list a small beetle known as Scirtes tibialis, looking like a flea beetle, 

 seriously injuring the leaves of plums, its first reported occurrence in 

 Minnesota. 



Crown Gall: This infectious plant disease, attacking raspber- 

 ries and blackberries, particularly the former, was noticed by us here 

 in abundance for the first time in 1007, though it has been known to 

 occur here before. Its source has been traced to a few nurseries ap- 

 parently, where owners have promised us to stamp it out as far as 

 they can. The disease is of such a serious nature, and so destructive 

 to raspberries that a special illustrated ]nil)lication was issued regard- 

 ing it. From a legal standpoint a nurseryman is not entitled to a cer- 

 tificate from the State Entomologist as long as this disease is found 

 upon his stock. 



(Jne strawberry grower has reported (1908) the presence of the 

 Strawberry Root Louse, Aphis forbesi, in his fields. As this is the 

 first time its occurrence here has been known to us, this department 

 is keeping in touch with the case, and making it an object of special 

 study. 



Special Experiments: The Office of Experiment Stations at 

 Washington has suggested the life history of the Apple Leaf Hopper 

 and of the Grain Plant Louse, Macrosiphum granaria, as special prob- 

 lems for this division of the Experiment Station. To these it has 

 added BrncJiopJiagus fiiiicbris, an insect which seriously affects the 

 production of clover seed. The life histories of these three pests 

 have never been completely worked out, and during 1907 and 1908 

 the entomological force has made special effort in this direction. Most 

 gratifying results have been obtained from work with the first of these, 

 Empoasca mail, and progress made with the other two. 



Work with the "Green Bug" has been continued, both in field 

 and insectary, and this louse is found to be quite generally distributed 

 over the state, but by no means in dangerous numbers. It has been 



