136 THE APPLE LEAF HOPPER 



T, /^ 1 ^»„..i „j 'n„t„i Percent Plot and 



Row Good Marked lotal Marked Treatment 



21 185 .... .... 



22 • 200 .... .... 



23 200 .... .... No. 5 



24 195 .... Lime and 



25 240 .... .... Oil of Cloves 



1020 .... .... 



26 180 .... .... 



27 167 .... .... 



28 175 2 .... No. 6 



29 134 2 .... Lime and 



30 170 2 .... Carbolic Acid 



826 9 .... .01^; 



EXPERIMENT NO. 4.— HELLEBORE DECOCTION. 



On June 2ytli planted eight rows of radishes sixteen feet long. July 

 9th these were treated with hellebore decoction (4 oz. steeped in 2 gals, 

 water), and repeated on July 23rd. Pulled and counted on Julj- 27tli. No 

 advantage in the use of this decoction was apparent. 



EXPERIMENT NO. 5— TOBACCO DUST. 



On June 25th eight sixteen-foot rows of radishes planted. Tobacco dust 

 was scattered thickly in the rows before sowing the seed. July 28th radishes 

 pulled and counted. Seven per cent of the roots were marked by mag- 

 gots. This treatment made a good showing compared with the check plot, 

 and might have done even better possibly if there had been one or two 

 treatments after the radishes were up, omitting the first treatment when 

 sowing. We have found tobacco to be an excellent fertilizer for radishes. 



EXPERIMENT NO. 6— MISCELLANEOUS. 



On June 5th twelve rows of radishes were planted, different substances 

 being planted with the seed as follows: 



Two rows — Tobacco Dust. 



Two rows — Carbolic Acid and Milk of Lime. 



Two rows — Sulphur. 



Two rows — Check. 



Two rows — Hellebore. 



Two rows — Salt (to test a statement of a correspondent). 



As might have been expected, the plants were injured by this treat- 

 ment, and in the following order: Salt most injurious, then carbolic-lime, 

 tobacco dust, hellebore, sulphur. In Experiment No. 5, however, tobacco 

 dust was used with success. This difference in result may have been due to 

 abundant rainfall at a time when the seedling could be easily injured. The 

 check rows showed so little injury by maggots at this date that the experi- 

 ment loses force in consequence. 



EXPERIMENT NO. 7— MISCELLANEOUS. 



Sixteen rows of radishes planted June 5th, and with the seed was 

 placed the following: One row salt (to test statement of correspondent); 

 one row tobacco dust; one row powdered hellebore; the remaining rows 



