
ee } 
{ | 15 
i under varying conditions for A he same purpose and certain 
3 will be tried in comparison with the older and better 
it standards, Effects on differe insects under different 
411 form an important part of this) work. 
k on the potato-tuber moth, one of the most destructive im- 
sects when it occurs in California and nearby States, lacks 
@ testing of certain new remedies and the checking of some of 
eady tested, to complete it. Its lif epee and natural 
ve been followed since the fall of 191% During 1913 the cul- 
Ol-methods were checked and in the main proved that the recom- 
is in Circular 162 and Farmers’ Bulietin’557 were correct, Ex- 
“as to the best manner of killing all stages of the insect whére 
ady occur in potatoes are yet incomplete. {It is the aim to 
h this in one treatment but it is doubtful if this can be done 
injury to the tubers, The remedies tested thus far have consis- 
Pping in various solutions, and in fumigation. The main diffi- 
8 far encountered is in killing both eggs and larvae with a 
Catment. It is possible that two separate treatments will 
be “applied. ; 
' , \ 
TROPICAL AND SUBTROPICAL FRUIT INSECT INVESTIGATIONS. 























i“ * . 
. C. aelace, ig charge. 
Woglum, *who is te eharee of} the field work of citrus fumi- 
Southe n California, as been in Washington for the past two 
pervising various experiments conducted by the Bureau of Chem- 
With different kinds cyanid used n commercial fumigation. He has 
devoted considerable time to the preparation of a Farmers’ Bulletin 
us®fumi atio which will be issued in the near future. 
H. A. Back, »in charge of the Mediterranean fruit fly investiga- 
Hawaii, recently spent some time in Washington outlining future 
the islands. While in the Hast Dr. Back also visited Bermuda to 
bigatte the Mediterranean fruit fly situation. 
, W. W. Yothers, in field charge of the white fly spray demon- 
tions in Florida, was in Washington from February 13 to 17, inclusive, 
ecting plans for future work. In addition to the demonstration 
P Mr. Yothers, during the past year, has devoted considerable time 
6 study of the rust mite and its control. 
Wr. Frederick Maskew, who was formerly engaged in citrus fum— 
ion experiments with Mr. Woglum in southern California, and now Dave 
rantine Officer of the State of California, is at present in 
ton in the interest of the proposed Mediterranean fruit fly 
