SAVE US FROM INVADING PESTS 



151 



one informal conference with some nurserymen, in which 

 this problem was discussed, there was evidenced the 

 feeling that nurserymen generally would be fairly well 

 satisfied if all "finished nursery stock," including all 

 plants with balls of earth about their roots, were pro- 



EUROPEAN PINE SHOOT MOTH 

 This pest has in recent years been introduced into America on imported pine 

 seedlings and is now established in widely separated localities in the eastern 

 and middle western states. 



hibited, and permission given to import (1) fruit tree 

 seedlings; (2) 2-year seedlings, cuttings, buds or grafts 

 of ornamental shrubs; (3) deciduous shade, ornamental 

 and forest trees not to exceed six feet; (4) coniferous 

 evergreen stock not to exceed eighteen inches, except 

 5-leafed pines, which are prohibited. If a proposition of 

 this sort were maintained and an embargo arranged ac- 

 cordingly, I fully believe that 75 per cent of the present 

 amount of inspection would be eliminated, and, further- 

 more, this arrangement would eliminate the importation 



TWISTED GROWTH OF EUROPEAN PINES 



This is a characteristic injury caused by the larvae of the 



European pine shoot moth. 



of some plants, most dangerous on account of the impos- 

 sibility of inspecting them thoroughly. 



After giving this problem much thought and con- 

 sideration I feel that I could recommend, without too 

 much injury to the importing nurserymen, an embargo 



WORK OF THE EUROPEAN PINE SHOOT MOTH 

 Showing the fall injury to pine buds by young larvae of the moth. 

 Many buds are thus destroyed, as in America the larvae have 

 developed the habit of eating out from two to four buds before 

 winter. 



ANOTHER FORM OF INJURY 

 This malformation caused by the larvae of the European pine 

 shoot moth is so familiar in European pine forests that it has 

 a popular name in each country, as "posthorn" and " waldhorn" 

 in Germany and Holland and "baionnette" in France. 



