83 



CHAPTER XIV. 



THE APHIS VASTATOR ON OTHER PLANTS. 



Solarium dulcamara and nigrum attacked by the vastator (334). 

 Its effect upon them (335). Greenhouse and other species of 

 solanurn (336). Atropa belladonna (337). Hyoscyamus (338). 

 Tobacco not attacked (339). Stramonium attacked (340). 

 Comparative effects on wild and cultivated plants (341). Mode 

 of operation (342). Numerous cruciferous plants attacked (343, 

 344). Horse-radish (345). Tomato (346). Vastator on Indian 

 corn (347). On wheat (348 351). Not on the oat (352). 

 Wild barley grass (354). Seedling pasture grass (355). Jerusa- 

 lem artichoke (357). Nettle (358) Mallow (359). Hearts- 

 ease (360). Coreopsis tinctoria and 'Balsam (361). Parsnip 

 (362). Chickweed (363) Young elders (364). Geranium molle 

 (365). Plantain (366). Groundsel (367). Shepherd's purse 

 (368). Spurge (369). Marigold and Thistles (370). Peach and 

 Nectarine (371). Celery (372). Probably other plants also 

 (373). Remark (374). 



(333.) IT became a matter of very great interest to as- 

 certain whether any other plants, besides the potatoe and 

 the turnip, were affected by the vastator ; and if they were, 

 to what extent they were likely to suffer. To the investi- 

 gation of this point, then, I gave my undivided attention, 

 and to the results of this investigation I devote the present 

 chapter. 



(334.) I have found the insect upon the Solatium dulca- 

 mara and nigrum; on the first of these, when it grows 

 about the hedges, I have never found many of the insects, 

 for they do not appear to take a great fancy to this plant 

 in this situation. However, upon this as well as upon the 

 nigrum, I have found it in great abundance when the plant 



