BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE 
3 
At Vincennes, Ind., the repeated evening spraying of apple trees 
with small quantities of nicotine sulfate solution poisoned many of 
the moths and reduced the number of injuries by 42 percent. 
PARLATORIA CHINENSIS CONTROLLABLE 
Laboratory and field tests at St. Louis, Mo., indicated again that 
effective commercial control of the introduced scale insect Parlatoria 
chinensis (Marl.) can be obtained with oil emulsions. An emulsion 
containing 3 percent of a paraffin-base oil with a viscosity of 100 Say- 
bolt seconds or higher or 4 percent of a similar naphthene-base oil 
should be applied during the late-dormant or delayed-clormant period, 
and an emulsion containing 2 percent of an 80-second or higher par- 
affin-base oil during the summer at times when most of the scales 
present are in the immature stages. 
A continuation of the survey to determine the distribution of this 
scale insect has revealed for the first time a number of infestations in 
St. Louis County. The outermost infestation was about 5 miles from 
the St. Louis city limits. Several shipments of plants from infested 
properties to other States were followed up without bringing to light 
any new infestations. 
ADVANCES IN CONTROL OF THE PLUM CURCULIO ON PEACH 
Two applications of ground sprays consisting of dichloroethyl 
ether or dicldoroethyl formal at Fort Valley, Ga., proved as effective 
against the plum curculio as the regular schedule of lead arsenate 
sprays. 
An improved curculio- jarring sheet which holds the curculios in a 
bag in the center, developed at the Fort Valley laboratory, caught an 
average of 2.5 beetles per tree as compared with 1.3 beetles per tree 
caught with the old sheets. 
NEW INFORMATION ON ORIENTAL FRUIT MOTH PARASITES 
A big increase in the production of Macrocentrus ancylivorus Ron., 
the most important parasite of the oriental fruit moth, has resulted 
from rearing the parasites on the potato tuber worm. Use of this new 
host was made possible by the discovery of the tuber worm near 
Moorestown, N. J., where it had not formerly been believed to be 
present. This parasite was found to overwinter abundantly in straw- 
berry leaf roller larvae infesting wild blackberries and related plants 
which occur in large numbers in the vicinity of peach orchards in 
southern New Jersey. This finding opens up the possibility of effective 
parasite colonization late in the season, and indicates that cage breed- 
ing of parasites on the strawberry leaf roller might be more successful 
with some of these newly found plant hosts than with the cultivated 
strawberry previously used. 
CULTURAL METHODS CONTROL SHUCKWORMS ON PECAN 
Further experiments at the Albany, Ga., laboratory in cultural 
control of the hickory shuckworm by destruction of the larvae in in- 
fested nut drops through the use of a disk tiller substantiated the 
favorable results obtained during the three previous seasons. For the 
