t 48 ] 



From many obfervations made on fets planted at 

 different depths, I am convinced that deep planting is 

 an erroneous practice. Thofc planted near the fur- 

 face generally vegetated the mofl luxuriantly; the 

 influence of the fun and atmofphere were fooner 

 received, which, hardening the fibres of the young 

 flioot, quickly rendered it lefs liable to the difeafe. 



The theory of this diforder feems very confident 

 with what we obferve in other vegetables. It is not 

 upon the potatoe alone that fuch depredations are 

 made. A worm is frequently found in the roots of 

 cabbage plants, fufficient to check the luxuriancy of 

 their growth; but thefe being nourifhed by broader 

 leaves and more ftrong and hardy fibres than the po- 

 tatoe, receive lefs injury. To young onions, which 

 are more tender, and depend chiefly on the root for 

 fufl:enance, the worm is more fatal than to the pota- 

 toe : foon after the attack thefe die away. We may 

 remark fimilar effefts above ground, where we fee 

 the infers that commit the injury. Ants and ear- 

 wigs, upon wall trees, a fmall black infeft which is 

 found on the top of beans, all prey upon the tender 

 fucculent parts ; and the injury received in thefe, as 

 in potatoes, caufes the leaves to curl. 



In northern afpe£ls, or on cold damp land, the 

 curl is lefs frequent than on warm or fimdy land, 

 where infe£ls are more numerous ; and it is pretty 

 generally acknowledged that feed potatoes, procurea 

 from damp raoraffy lands, or thofe from more cold 



