Cl|c Cniindian Jtntomolugist 



Vol. XLVII. LONDON. OCTOBER, 1915 No. 10 



POPULAR AND ECONOMIC ENTOMOLOGY. 



The Establishment of Foreign Insects in spite of Inspection. 



by harry b. weiss, new brunswick, n.j. 



At Rutherford, N.J., are located two large nurseries which 

 import a considerable quantity of nursery stock from Europe, 

 Asia and South America every year. During the spring of 1914 

 three thousand seven hundred and forty-four cases of imported 

 stock were consigned to Rutherford; during the fall of 1914 the 

 number of cases was one thousand seven hundred and si.xty-five, 

 and during the spring of 1915 two thousand one hundred and 

 ninety-one cases were received. From these figures, representing 

 the combined imports of the two firms, one can get some idea of 

 the enormous numbers of imported plants which are set out in 

 this vicinity and later distributed to various points in the United 

 States and possibly Canada. 



During the inspection seasons, one or more men are stationed 

 at Rutherford for the purpose of examining this stock as it comes 

 in, and all possible precautions are taken to see that nothing un- 

 desirable is introduced. Yet, in spite of this, the following foreign 

 species have recently become established in that vicinity. 



Phytomyza aquifolii Gour. was lately found mining the leavies 

 of English holly. This species has also been taken, mining the 

 leaves, on English holly imported from Holland. In May, 1915, 

 the European pine-shoot moth, Evetria huoliana Schiff was taken 

 in Piniis mughus growing in the nursery. During August, 1913, 

 Agrilis viridis Linn. var. fagi Ratz. was found infesting rose stems 

 and doing considerable damage in this as well as in other sections 

 of the state. 



In January, 1914, Aspidiotus tsuga Marlatl was taken in 

 considerable numbers on Japanese hemlock. Since that time, 

 however, all infgsted trees found have been destroyed. 



Myelophilus piniperda Linn., which often does extensive 

 damage to pine trees in Europe, was also found at Rutherford in 

 Pinus sylvestris. In 1909 Dr. J. B. Smith had his attention called 



