186 REPORT 



Iron weed ( Vemonia noveboracensis). Alcoholic extract and decoc- 

 tion . Ko result. [E. A. Schwarz.] 



Tansy {Tanacetum vulgare). Alcoholic extract and infusion. No re- 

 sult. 



Dock weed {Eumex sp.). Alcoholic extract. No result. [E. A. 

 Schwarz.] 



Spearmint {Mentha viridis). Alcoholic extract. No result. [E. A. 

 Schwarz.] 



Jerusalem weed (Chenopodium anthelminticum). Alcoholic extract 

 and infusion. ^-This is another exceedingly strong-smelling substance, 

 especially in the form of alcoholic extract made from the blossoms and 

 green fruits, but no effect whatever was observed." [E. A. Schwarz.] 



Sassafras {Sassafras officinale). Alcoholic extract from the dried 

 bark of the root. No result. [E. A. Schwarz.] 



Goat wieed {Croton texanum, G. glandulosum^ C. capitatum, and G, 

 monanthogynum). Decoction from leaves and blossoms. Also a very 

 strong-smelling fluid. No result. [E. A. Schwarz. | 



Black walnut {Juglans nigra). Alcoholic extract and decoction. 

 "A substance which, especially in the form of decoction, deserves fur- 

 ther attention. It has no effect on the worms upon contact, but renders 

 the leaves decidedly distasteful to them. On the second day after ap- 

 plication the leaves which had received a large amount of the decoction 

 remained fully intact, the worms having removed to the lower branches 

 and to those portions of the plants which were not, or but little, treated 

 with the decoction. Several worms kept in captivity without food ex- 

 cept leaves drenched with this decoction finally fed upon them and 

 successfully changed to pupae. The decoction stains the leaves dark 

 brown, but apparently without injuring them." [E. A. Schwarz.] 



Horse nettle {SoJanum carolinense and ^. eornutum). Decoction. 

 No result. 



Indian heliotrope {Eeliophytum indicum). Decoction. No result. 

 [E. A. Schwarz.] 



Mock orange {Philadelphus inodorus ?). This is recommended as an 

 insecticide all over the South, for the only reason, it seems, that it is 

 injurious to stock. Decoction, infusion, and alcoholic extract had no 

 effect whatever on the worms. 



White BORDERED euphorbia {Euplwrhia marginata). Decoction. 

 No result. [E. A. Schwarz.] 



CoPFEE weed {Gassia ocoidentalis). Alcoholic extract and decoction. 

 "This has undoubtedly some effect on the worms, though much less 

 than the China tree berries. Appears to act upon contact, though very 

 slowly. The worms appear to get affected several hours after applica- 

 tion, resting motionless and without feeding, but were recovered on the 

 second day. Some young worms were found dead one day after appli- 

 cation, but it is doubtful whether from the effect of the decoction or 

 killed by the force of the spray." [E. A. Schwarz.] 



