CULTURE OF THE ROSE. 37 



or syringing the bushes, with a liquor made by mixing with water 

 the juice expressed from tobacco by tobacconists, has been recom- 

 mended : but some caution is necessary in making this mixture of 

 a proper strength ; for, if too strong, it is injurious to plants ; and 

 the experiment does not seem, as yet, to have been conducted 

 with sufficient care to insure safety and success. Dusting lime 

 over the plants, when wet with dew, has been tried, and found of 

 some use ; but this and all other remedies will probably yield in 

 efficacy to Mr. Haggerston's mixture of whale-oil soap and water, 

 in the proportion of two pounds of the soap to fifteen gallons of 

 water. 



" Particular directions, drawn up by Mr. Haggerston himself, 

 for the preparation and use of this simple and cheap application, 

 may be found in the * Boston Courier ' for the 25th of June, 1841, 

 and also in most of our agricultural and horticultural journals of 

 the same time. The utility of this mixture has already been 

 repeatedly mentioned in this treatise, and it may be applied in 

 other cases with advantage. Mr. Haggerston finds that it effectu- 

 ally destroys many kinds of insects ; and he particularly mentions 

 plant-lice, red spiders, canker-worms, and a little jumping insect, 

 which has lately been found .quite as hurtful to rose-bushes as the 

 slugs or young of the saw-fly. The little insect alluded to has 

 been mistaken for a Thrips, or vine-fretter : it is, however, a leaf- 

 hopper, or species of Tettiyonia, and is described in a former 

 part of this treatise. 



" The rose-chafer, or rose-bug as it is more commonly and incor- 

 rectly called, is also a diurnal insect. It is the Melolontha subspi- 

 niHsa of Fabricius, by whom it was first described, and belongs to 

 the modern genus Macrodaetyhu of Latreille. Common as this 

 insect is in the vicinity of Boston, it is, or was a few years ago, 



