es 94 























Conference at Charleston, 8. €.--A conference was held on Nove 
ber 27 to 28 at the South rth Carolina Lina Coastal Sree Station, Char 
GON.» Bs. C. The following workers were present: ~€. 0. Bare, P.-Ss 4 
Chamberlin, L. B. Reed, W. J. Reid, C. E. Smith, C. F. Stahl; Jo Mem 
Tenhet, W. A. Thomas, J. R. Weedon, and W. H. White: A penal dis- 
cussion of the arsenical~residue problem was envaged in, special fT 
emphasis being placed on methods of eliminating tarmfui residues on” > 
cabbage and tobacco. Methods of experimentation wi sampling for) aim 
worm populations and the difficulties encountered in applying treat- ~~ 
ments and the relative merits of various diluents ie dusters also) Samm 
came up for discussion. This conference was of considerable value to 
all present, and brought out the fact that further experimentation 
will be necessary before general recommendations can be issued to the 
growers as to the most effective use of rotenone and pyrethrum com- a 
pounds. Also, further work will be necessary on residues on cabbage 
before it can be definitely determined when treatment with ar senicals | 
or similar compounds should cease in order to eliminate the possibile 
ity of resicues reaching the market. The plan now is to continue. 
these experiments another season in order to extend the work over-a 
period in which varying climatic conditions are »revalent. 
4 
mp 
During Mr. White's visit to the South, in comoany with K. L. 
Cockerham of Biloxi, -Miss., and Georgia State representatives, C. H. 
Gaddis and Di. Moody, he visited the islands off the coast cf Georgia aay 
where the seaside morning-glory clean-up work is being carried on = 7 
with funds provided for emerzency relief work. This work is under 
the direction of the State of Georgie, end is progressing very rapid=_ 
ly. Those’in charge are to be commended for the thorough clean-up. 
being made of this wild host of the sweetnotate weevil. Mr. White 
also visited the laboratory at Sanford, Fla., the trucking areas abou 
Fort Myers and the Everglades, and the laboratory at Quincy. 
FOREST INS&CTS 
Bark-peetle infest:tion shows Siete epi Ar ise Gibson, «gi 
of the Coeur d'Alene, Idaho, ficld laboratory} reports that since 19% 
an outbreak of the mountain pine beetle i ies chaeeanat monticolée. Hopk.s. 
in lodgepole pine on the Beaverhead National Forest in Montana has 
been increasing in severity, until in 1932 more than 17,500,000 tree, 
were killed on-an area in excess of 1,340,000 acres. In the fall 
19%2 there was every indication that the destruction in 1933 would at 
least equal thet uf the preceding year. However, when examinations” 
of trees attacked in 1932 were made late in the sering of 1933, it 
was generally found that the only bark beetles that survived the ex— 4 
tremely low winter temperatures were in the art of the tree that wm 
below tae surface of the snow. Two severe cold weves which swept o 
western Montanc and portions of the adjoining States during the winte . 
of 1932-53 ure believed to have caused the heavy nortality: of! bark (aa 
