148 THE MONTANA EXPERIMENT STATION 



NOTICEABLE INSECTS OF THE YEAR 1907. 

 THE EYE-SPOTTED BUD-MOTH 



(Tmetoccra occllana Schrif.) 



This insect appears to be rapidly spreading in the Bitter Root 

 valley, and we believe it to be practically universal from Missoula 

 and the surrounding country to Hamilton. We have recently found 

 it at various points between these two extremes. It is a pest that at 

 times becomes quite injurious, but from our experience with it and 

 fiom our experiments in Missoula in the summer of 1904, we believe 

 that it will be controlled incidentally in connection with spraying 

 for the codling moth and we believe that the practice of spraying 

 for this insect will soon be general. 



The bud-moth feeds in the spring of the year in the opening 

 buds of the apple, eating out the tender shoots and producing abnor- 

 mal branching, besides destroying the prospects for a crop of fruit. 

 Later in the season the young larvae of the new brood feed from 

 the surfaces of the leaves, and it is at this time that the species is 

 most open to control. 



THE OYSTER-SHELL BARK-LOUSE 



(Lcpidosophcs ulini Linn.) 



This insect, generally looked upon as being one of only second 

 class importance by fruit growers and entomologists of the United 

 States, has been found to be very prolific and injurious in western 

 Montana. The species has held our attention for several years and 

 has been gradually spreading and increasingly we have received com- 

 plaints from owners of orchards in the Bitter Root valley, the coun- 

 try along the line of the Northern Pacific railway west of Missoula 

 and from Flathead county. In a few cases the writer has seen small 

 orchards which at a distance of about half a mile plainly showed a 

 sickly condition. In many cases the fruit on infested trees has been 

 seriously injured by reason of the great numbers of the scale insects 

 settling on them and causing spots and pits. We have recommended 

 spraying with kerosene emulsion at the time the young lice are hatch- 

 ing and crawling about on the bark, but our growers are afraid of 

 this insecticide and believe that trees were injured by its use. So 

 persistent and widespread is this belief that we have decided to make 



