568 REPORT OF THE COMMISSIONER OP AGRICULTURE. 



E.vpei-iment 187. Resin compound 135. 



Compound, 1 pint; water, 1 gallon. Applied October 8. Will penetrate all egg- 

 masses well on liglit spraying in about two mirmtes. October 11, some of the mother 

 scales still living, but no fresh eggs could be observed. October 14, scales aU dead. 

 November 4, no young have hatched; tree not injured. 



Exjieriment 138. Resin soap. 



Made of resin, 2 pounds; tallow, 2 pounds; caustic soda, 1 pound; and water to 

 make 28 pints of soap; costing i cent per pint. 



8oap, Ipint; water, 2 gallons. Applied October 14. Did not i^enetrate egg -masses; 

 killed most of smaller scales, but had no effect on contents of egg-sacs. 



Experiment 139. Soap 138. 



Soap, 1 pint; water, H gallon. Applied October 14. Will penetrate only the 

 smaller egg-masses well. October 16, all scales are dead. November 4, no young 

 had hatched. 



Experiment 140. Soap 138. 



Soap, 1 pint; water, 7 pints. Applied October 14. Will penetrate all egg-masses 

 well on light spraying. October 16, no living scales could be found. 



Experiment 141. Resin compound. 



Made of resin, 4 pounds; washing soda, 3 pounds; and water to make 24 pints of 

 compound. This is somewhat thick, and will not so readily mix with water as 129, 

 especially after cooling. 



Compound, 1 pint; water, 1\ gallon. Applied October 15. Penetrated all egg- 

 masses and destroyed them; some of the mother scales produced fresh eggs before 

 dying. Found no living scales October 25. 



Experiment 142. Resin compound 141. 



Compound, 1 pint; water, 1 gallon. Applied October 15. Will penetrate all egg- 

 masses well in about 2 minutes with light spraying. Found no living scales Octo- 

 ber 16. 



Experiment 143. Resin compound 141. 



Compound, 2 pints; water, 1^ gallons. Applied October 15. Will penetrate im- 

 mediately. October 16, nothing living.\ October 28, scales still soft, but rotten. 

 November 4, no living scales on tree, which was left in fine condition, with the wash 

 still visible. 



Experiment 144. Resin soap. 



Made of resin, 1 J pounds; tallow, 1^ pounds; caustic soda, 1 pound; and water to 

 make 23 .V pints of soap ; costing \ cent per pint. 



Soap, i pint; water, 2 gallons. Applied October 18. Penetrated all but a few 

 large egg-masses well with light spraying. October 23, all scales dead; no fresh 

 eggs. October 28, found occasionally one newly hatched larva. 



Experiment 145. Soap 144, 



Soap, 1 pint; water, 1\ gallons. Applied October 18. Destroyed all eggs and in- 

 sects. 



Experiment 146. Soap 144. 



Soap, 1 pint; water, 1 gallon. Applied October 18, All egg-masses well pene- 

 trated after spraying; destroyed all eggs and scales; not the slightest injury done 

 to the tree. 



Experiment 152. Resin soap. 



Made of resin, 2 pounds; tallow, 1 pouiad; caustic soda, 1 pound; and water to 

 make 25 pints of soap; costing 11 cents. 



Soap, 1 pint; water, 2 gallons. Applied October 27. Will penetrate nearly all 

 egg-masses with light spraying. November 1, all scales dead; no fresh eggs leit; a 

 few of the old eggs will hatch. 



Experiment 153. Soap 152. 



Soap, 1 pint; water, 1^ gallons. Applied October 27. Will penetrate all egg- 

 masses well in about two rninutes after a light spraying. Next day some of the 

 mother scales were still living, but all were dead October 30, and no fi-esh eggs were 

 left, November 4, nothing living; fungus loosening and coming off; tree in fine 

 condition. 



