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nesium arsenate, lead arsenate, calcium arsenate (Niagura), calcium 
arsenate (Dow), c ee, sodium fluosilicate, and berium fluosilicate. 
Derris dusts contuining 1, 2, and 3 percent rotencne were very ef- 
fective against overwintered beetles, larvae, and newly develcped 
beetles. Derris containing 1 percent rotenone was more effective than 
Cubor dust." Field tests indicated that calcium arsenate is the 
cheapest material. It continues to be the most generally effective 
under field conditions for the dry-farmed areas of the Southwest. 
Insecticide results on Sternechus paludatus vaser---Mr- Doug— 
lass gives the following summary of insecticidal aap avainst the 
weevil pectiechie paludatus foxes : "In the dust tests zinc arsenit 
led in the percentage killed, followed by magnesium ersenate, caloamen 
arsenate Pt ORT lead arsenate, barium fiuosilicate, and sodium 
fluosilicate. In the spray test, zinc arsenite led in the percentage 
killed, followed by lead arsenate, calcium ursenate (Niagara), barium 
Bitosiiica ite, Magnesium arsenate, ana sodium flucsilicate. Cubor dust 
and derris, contuining 3 end 5 percent rotenone, were not effective in 
killing this weevil." 

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dusky, Ohio. The rarer ene stared in hos e Pakes wes taken from the 
field, the roots being partially cut off by a corn cultivatcr. Mud 
vas Shaken from the routs and the stalks placed uprizht over the floor 
of the house without leaving any aisles. The county aunt had been 
called in to aid the grower, and cyanide fumigation to the extent of 
1 ounce to 100 cubic feet had been tried without control. The celery 
in the house that hed been fumigated lad apparently been injured by 
the fumigation. The owner had started tc shake the larvae from each 
stalk of celery into tubs, and it was estimuted that about 90 percent 
of the larvae were being knocked off. Dipping the celery in varicus 
concentrations of »pyrethrum and derris extract was found to be in- 
feasible because of demands that the celery be kept dry for success- 
ful storaye. The use of pyrethrum and tobacco dust did not appear 
feasidle because it would be impossible to reach the worms, since the 
celery was stacked closely on the dirt flcor of the house. Insecti- 
Cidal measures would probably be unsatisfactory also, because of the 
low temperature in the house. It was decided thet shaxing was probab- 
ly the most satisfactory control. One field was examined and worms 
were found to be rather numerous. In view .f the fucts that the 
temperature was in the 30's at the ee nos the examinetion and tha 
there was little likelinood of obtaining high temperatures before the 
celery would have te be stored, it was deened inadvisable te try to 
treat the field. The owner planned to shake all of the larvae out of 
the celery before placing it in sterajie. 
