AND OTHER INJl'RIOUS INSECTS OF I907 AND I908. I39 



Row Good Marked Total Per Oent Marked 



23 160 1 161 



24 183 6 189 



8 350 .m% 



25 135 6 141 



26 125 10 135 



16 276 ^06^ 



27 145 15 160 



28 103 8 111 



23 271 .08^ 



EXPERIMENT NO. 12 TRANSPLANTING AND DIPPING ROOTS. 



This experiment was performed purely from a scientific interest in get- 

 ting results. Naturally the method never could be used in practice. 



On June 13th five rows (25 plants each) were set out, the roots being 

 first dipped as here indicated: 



Row 1 — Tobacco Dust. 



Row 2 — Lime. 



Row 3 — Sulphur. 



Row 4 — Untreated. 



Row 5 — Carbolic Lime. 



Plants in 1, 2 and 3 were dipped in water first to make the above sub- 

 stances adhere. None of the treated plants were noticeably injured by 

 maggots, but the lime and the carbolic lime injured the plants. 



Summarizing- from work of 1908 and from previous experi- 

 ments : 



Radishes grown in the open are apparently benefited by sev- 

 eral applications of hellebore decoction (4 oz. of white hellebore 

 steeped in 2 gals, of water) applied with a watering pot, first when 

 plants are one and one-half inches high, and three or four later 

 applications at five days' intervals; or by the use of tobacco dust 

 with equal frequency in the same way. Or by the use of milk of 

 lime with either oil of tar, oil of cloves, or crude carbolic acid as 

 above. These last three are not to be regarded as practical when 

 more simple remedies are available. 



W'e have obtained good results in our own garden by the use of 

 tobacco decoction (about 1>4 lbs. of stems steeped in 4 gals, water), 

 applied frequently with a watering pot. 



Oil of cloves costs about 20c per oz.. and oil of tar about 20c per 

 pint. 



