i ee a 

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Source Herwigs Puparia Parasitization 
a eer ‘Number Nunber Percent 
France ... » » 14,872 76 0.405 
PBB. | thas 5 oes 110,400 1,604 1.45 
England . . . 17,500 1,049 5:99 
Tuc Te ay 142,772 2-751 1.93 

It will be noted from the above tabulation that the shi:ments 
from England yielded the hirhest rate -f ,arasitizaticn, with Italy 
and France following in the ordsr named. The earwig mortality in 
e shipments ranged from 20 to £5 percent, owing principally to 
the lack of sufficient moisture in the shipoing container. 
Insecticidal effectiveness varies with species combated.--C. F. 
otahl, of the Sanford, Fla., laboratory, in commenting on experiments 
condu ard against the celery leaf tier, the southern armyworm, and 
the conmon cabbage worm with pyrethrun, rotenone, fluorine, and arsen- 
ical compounds, states, "Tests developed that. pyrethrum is satisfac-— 
tory for the celery leaf tier, but ineffective against the southern 
armyworm; rotenone is effective against the cabbage worm, but of no 
aplvarent value fur the celery leaf tier and armyworm; fluorine and 
arsenic compounds are quite effective against the southern armyworn, 
but of ne particular value for the celery leaf tier. More informa- 
tion is needed on the effectiveness of pyrethrun sete te) the cabbage 
worm anc it is hoped that this will soon be available. 
Correction: In the January’ 1934 Monthly News Letter (Number 
236), pege 6, the fourth line from hottom should read "a costiof 
$28 per 600 pounds" instead of "a cost of $28 per 100° pounds," 
Mountain pine beetle epidemic spreads through Idaho national 
forests.--J. C. Hvenden, of the Coeur d'Alene, Idaho, field labora- 
tory, writes: "In 1927 a small outbreak of the mountain sine beetle 
(Dendroctonus mone colae Hupk.) wes reported from the eastern portion 
or the Nezperce National Forest. This outbreak was apparently a 
chance infes tar on from the severe epidemic that existed in the 
lodgepole pine stands of the Bitterrvot and Salmon Forests. Since 
that date the infestation has spread northward, devastating all 
lodgepole pine stands in its path. an analysis of the 1933 ranger 
reports shows that this epidemic has passed through the Nezperce 
and Selway Forests, and now rests in the Clear ‘water, with a few 
spots of infestation on the St. Joe Forest. Although it is ac- 
cepted that the remaining lodgepole pine stands within these forests 
