vam 
p.m., July 18; sun shining, light breeze. August 6, leaves uninjured ; 
found fourteen live red scales. The pup and recently transformed 
adults of the Chalcid fly, Dilophogaster californica Howard, which in- 
fested fully 80 per cent. of the black scales (Lecanium olew Bernard) 
on this tree, were all of them destroyed by this spray. 
(187) Resin 23 pounds, tallow 14 pounds, crude potash 54 pounds, 
water to make 100 gallons; costs $1.10. Sprayed on a lemon tree at 
4.30 p.m., July 17; sun shining, light breeze. August 6, leaves unin- 
jured; found three live red scales. 
(185) Resin 19 pounds, water to make 100 gallons; costs 38 cents. 
Sprayed on an orange tree at 4 p. m., July 17; sun shining, light breeze. 
August 6, leaves and newest growth uninjured, but few of the red scales 
were destroyed. 
(186) Resin 22 pounds, water to make 100 gallons; costs 44 cents. 
Sprayed on a lemon tree at 4.15 p. m., July 17; sun shining, light breeze. 
August 6, same as in the preceding experiment. 
EFFECTS OF THE EUREKA INSECTICIDE ON THE RED SCALE. 
On the Ist of August of the present year I received a letter from 
Acting Entomologist Howard, dated July 25, 1889, requesting me to 
make a test of the ‘‘ Eureka Insecticide,” put up by E. Bean, of Jack- 
sonville, Fla., who would forward me a few sample cans of the insecti- 
cide for this purpose. These samples reached me in due time, and I 
carefully tested the preparation according to directions. One pound 
of it was emptied into a vessel, 6 gallons of cold water added, and the 
whole frequently stirred. After the lapse of one hour I allowed 
the insoluble portion to settle to the bottom of the vessel, poured off 
the clear liquid portion, and sprayed it upon an orange tree at 2 p. m., 
August 7; cloudy, light breeze. September 2 the leaves were unin- 
jured, and I could not discover that any of the red scales (Aspidiotus 
aurantti Maskell) that were encased in a scale or shell at the time the 
application was made had in the least been affected by the spray. 
In a circular received from the proprietor it is stated that this insecti- 
cide is sulphur in solution, a patented process, and that it “is abso- 
lutely fatal to the rust mite, and also to the scale insect during the 
breeding or migratory periods,” providing that the applications extend 
through the entire season. It is possible that this insecticide would 
prove fatal to the recently hatched red scale, but as this becomes cov- 
ered over with a shell inside of twenty-four hours after leaving the 
parent, and as the young ones appear during almost every day in the 
year, it follows that in order to be effective it would be necessary to 
apply this insecticide every day for three or four months consecutively 
—a task which very few of our fruit-growers would be willing to per- 
form. 
23479—No, 22-——2 
