my 
Flood results and damage to agriculture in southern California.—— 
R. E. Campbell, of the Alhambra, Calif., laboratory, makes the fol— 
lowing comments in regard to the recent flood: "While the damage from 
flood waters was lergely in the residentia al districts, incomplete re= 
yorts so far show some agricultural losses. About 1,000 acres in the 
Venice district were flooded, and probably much of this will be 
covered with mud. Mature celery on 300 acres will be a total loss. 
There was some loss from flooding in the Long:Beach area, dut a sur- 
vey of this will not be comple sted for several days. Hast of Pasa- 
dena about 1,000 acres of citrus was damaged by washing or heavy 
tering 17 of silt and rock. In the La Cresente area, where the 
<cemaaeets damage centered, many acres cf vineyard and some orchards 
were washed so badly as to be ruined agriculturally. Near Puente 
some truck crops and citrus were damaged by washing and deposits. 
Near La Habra some damage was done to terraced orchards of citrus 
and avocados, terraces being badly washed and.some trees lost. * * * 
The total rainfall for the storm wes given at an excess of 8 inches 
in Los Angeles, but the gauge at this station r stered 14.91 inches, 
more than 9 inches being recorded Sunday Aaya My ¥°It is of 20- au 
terest to note that the heavy damage and loss of life in La Gresente, 
Montrose, and renders was very largely due to. the excessive run-off 
from the mountain areas that have recently heen denuded by fire." 
xs 3 
anternal parasites of the beet SAS MAH elt not abundant last 
summer in’ Idaho.-—-C. Ped Hoe of Twin Falis, Idaho, reports 
that a large number of dissections of Eutettix tenelius were made 
during the past 3 months to determine tne percentage of internal 
parasitization in the breeding arees of southern Idaho. The dis-— 
sected material included representative collections taken in 1932 
and 1923 and indicated that the percentage of parasitization was- 
very low for both years, being considerably reduced over 1931, when 
the average internal parasitization was approximately 20 percent. 
The principai factors responsible for the low degree of parasitiza- 
tion during the past 2 years were, undoubtedly, a smail initial pop- 
ulation and the low host density throughout the spring and summer. 
Derris continues to be effective in cabbage worm control.-- 
CaAnvape V 
In a summary of results obtained to date in the control cf vests on 
fall cabbage, W. J. Reid, Charleston, S. C., states that derris roan 
powder continued to prove toxic to the species of cabbage WOrTs © 
present, which include loopers (Autographa brassicae Riley), com- 
mon cabbage worms (ascia rapae L.), and diamond—back moths (Plutella 
maculipennis Curt.). The degree of control obtained with derris 
powder was proportionate to the strength of material used. Best re- 
sults (not considering costs) fc aio the use of a mixture contain-_ 
ing 1.5 percent rotenone, As being the strongest dilution tested 
this season and the weakest used last season. An increase in this 
concentration to as high as 3.4 percent last year did not apparently 
increase the kill. A mixture containing only 0.1 percent rotenone 
showed some toxicity. 

