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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 11 
Popilia japonica Newm. (Col.). Recognized as a pest of grape, 
beans, peas and peanuts in Japan, this scarabaeid was recently found 
feeding on roses, ampelopsis, grape, elder, crataegus and button bush 
in a nursery and on various weeds adjoining the nursery. It was 
probably introduced into the state in the larval stage in the soil around 
iris roots imported from Japan. It is regarded as a pest in that coun¬ 
try and at present plans are being made in cooperation with the Federal 
Bureau of Entomology in an effort to exterminate it. In the mean¬ 
time, precautions have been taken to prevent its distribution in soil 
around nursery stock. 
Diprion simile Hart. (Hymen.). This saw-fly, which was first noted 
in this country by Dr. Britton, was found in several New Jersey nur¬ 
series during the past year or so. In all cases good results were ob¬ 
tained by spraying infested pines with arsenate of lead. Moreover 
this saw-fly appears to have an effective parasite in the shape of Mono- 
dontomerus dentipes Boh. 
Trioza alacris Flor. (Hem.). This species was introduced from 
Belgium where it is known as the bay flea louse and where it does con¬ 
siderable damage to the foliage of bay trees. The nymphs curl the 
leaves and in severe infestations the trees are rendered valueless as 
ornamentals. At the present writing it occurs only in one nursery in 
New Jersey and is being brought under control by fumigation with 
tobacco smoke during the winter. At this time the trees are in stor¬ 
age sheds and hibernating adults are readily killed if the fumigation 
takes place on warm days when the adults are not completely dor¬ 
mant. 
Stephanitis pyrioides Scott. (Hem.). This lace-bug, which is inju¬ 
rious to evergreen azaleas, unfortunately became widely distributed 
in New Jersey before it was noted. As a result its control outside of 
nurseries is a difficult problem. It was introduced in the egg stage 
in azaleas from Japan and is known to occur in Pennsylvania and in 
the District of Columbia. In New Jersey nurseries it is being con¬ 
trolled by sprayings with whale oil soap in late May or early June 
after the eggs have hatched. 
Peridermium strobi. During 1916 the white pine blister rust was 
discovered by federal scouts in four nurseries and one estate. At 
this time a total of 67 pines were found infested. All were destroyed 
and the blocks in which they were found were placed under quarantine 
for an indefinite period. 
During 1917, our inspectors together with federal scouts found only 
a total of 15 diseased pines in two of the nurseries where the disease 
appeared in 1916. No new places were found to be infected. The 
state has been fairly well scouted over, due to the help which we re- 
