PRN NEO A we. OP Rey eh ge ek ne mee a r Le Pe 4 x COM, in 
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=) =. \ =) REPORT OF THE ENTOMOLOGIST. 145 
"Experiment 177.—Kerosene emulsion 167 with arsenic, of which 1 pound in 55 gal- 
We ‘ 
ad lons wash, 
¢ Sh One-half pound of arsenic and one-half pound sal soda boiled in one-half gallon 
water until dissolved, and this diluted in 20 pints of water. 
Experintent 178.—Kerosene erin 167 pte arsenic, of which 1 pound in 55 gal- 
; " ons wash. 
“Emulsion, 1 part; water, 15 parts. Applied August 50, on A. rapax on Pear. 
September 1, leaves spotted, turning brown. September 7, all leavesdead and dry; 
_ bark not injured except on few smallest twigs; scales all killed. October 7, tree 
bringing forth new shoots all over; some in blossom; allbuds not dead growing. 
' November 22,new shoots of 8 inches in length had formed; fruit did not set; tree 
in good condition : still growing. December 17, tree fresh and green; no scales 
whatever. 
Eaperiment 179.—Kerosene emulsion 167 bees arsenic, of which 1 pound to 524 gal- 
lons wash. 
“Emulsion, 1 part; water, 20 parts. Applied August 30, on Aspidiotus «p., on Car- 
rant,and A, rapawon Cherry. September 7, leaves nearly dry and falling off; scales 
appear to be dead, but still have their naturalcoior. October 7, all scales and eggs 
dead; young shoots forming on Currant. November 22,currant plant still grow- 
ing; some blossoms and young fruit; no scales. December 17, no scales; a few of. 
_the berries have become mature, but are small. 
‘Experiment 180.—Kerosene emulsion ma arsenic, of which 1 pound to 55 gallons 
Wash. 
Emulsion, 1 part; water, 2 parts. Applied August 30, on Aspidiotus sp., on Cur- 
rant, A. rapax and M. pomorum on Apple. September 7, scales on Currant, where 
in thick layers, not all dead; a few eggs and newly-hatched, young found; A. rapax 
on Apple not all dead; gravid females and eggs of M. pomorum not affected; leaves 
of Apple dry and those on Currant nearly s6. October 7, scales on Currant all dry; 
plant growing; A. rapax on Apple all dead; eggs of M. pomorum in good condition, 
_ November 22, no living scales on Currant, this still growing; eggs of M. pomorum 
_ still intact. 
Experiment 181.—Kerosene emulsion 165 with arsenic, of which 1 pound in 55 gal- 
R lons wash. 
Emulsion, 1 part ; water, 15 parts. Applied August 30, on Aspidiotus on Cur- 
_Yant. September 7, leaves of plant all dry ; a few of the scales still living; also 
eggs and newly-hatched young found. October 7, all scales dead; plant in good 
condition. November 22, no living scales can be found. December 17, no living 
scales on plant. 
EXPERIMENTS WITH RESIN COMPOUND AND ARSENIC. 
Experiment 185.—Resin compound and arsenic, of which 1 pound in 85 gallons wash. 
Compound, 1 part; water, 16 parts. Applied September 2, on Lecanium hes- 
peridum on Orange.* September 7, most of the young and tender shoots de- 
stroyed ; a few leaves falling ; scales appear to be dead. September 13, scales all 
dead ; leaves still falling, only few remaining on tree. November 22, no living 
scales ; tree growing ; fall of young shoots, but very few of the old leaves remain- 
ing. | December 17, found four young scales, which evidently have come from 
neighboring trees ; tree in good condition again ; still growing. 
Experiment 185.—Resin compound and arsenic, of which 1 pound in 90 gallons wash. 
_ Compound, 1 part; water, 8 parts. Applied September 2, on L. hesperidum on 
Orange. September 7, scales dead; found a few living young under mother 
scale ; a few leaves falling. September 13, all scalesdead; about half of the leaves 
have fallen. October 7, no living scales. November 22, about one-third of the 
_ leaves remaining ; tree otherwise in good condition. December 17, tree in good 
condition ; no living scales. 
* All orange’trees experimented on were in poor condition, received no water dur- 
ing summer, and leaves were curled. 
AG 87 10 
