11 
Experiment 12. — WOLF’S SOAP. 
Solution, 3 ounces soap to 1 gallon water; temperature 90°. Sprayed 
on plants with the Woodason atomizer. 
Result . — Seems to have been rather more effective than in experi- 
ment 10. 
Experiment 13. — WOLF’S SOAP. 
Solution as in Experiment 12. Drenched plants thoroughly. 
Result . — Does not seem to have been any more effective, although a 
much larger amount of the solution was used. The spra^ ing method 
seems the more satisfactory. 
Experiment 14.— WOLF’S SOAP. 
Solution, 4 ounces soap dissolved in 1 gallon water. Sprayed on wet 
surface of leaves and head. 
Result . — Killed a large number of the larvae, but by no means all of 
them. 
Experiment 15.— BUCKWHEAT FLOUR. 
Dusted the article usually put up for family use on a number of in- 
fested plants. 
Result . — The larvae did not seem to suffer any inconvenience. 
Experiment 16.— BUCKWHEAT FLOUR. 
Placed 11 larvae in some of this same flour, and covered with glass. 
Result . — Forty eight hours after, none had died, while some had 
climbed to top of glass and pupated. 
Experiment 17.— AMMONIA AND WATER. 
Solution of 3 tablespoonfuls of ammonia to 1 gallon of water. Ap- 
plied with syringe. 
Result . — None were injured by the application. 
Experiment 18.— POWDERED ALUM. 
Applied to dew-wet leaves at 8.10 a. in., abundantly. 
Result . — Cannot see that any are destroyed. 
Experiment 19.— COPPERAS AND WATER. 
Dissolved one-lialf ounce copperas in 1 pint water; drenched several 
plants. 
Result . — This only seemed to cause the worms to seek less exposed 
positions. Watched for a number of days, but found none dead. 
