I 



2. 



tr 





een pre. 

 ■ito tbe 

 many 



^ifapjjear 

 b higher 



•m room 



I 



Increaf? 

 obferved 



le perpe- 

 jftore the 

 ence 



r, In 

 fs greater 



5 



3 to hut 

 er?ot> 



us, 







thers 



35 



{c0 





. h 



per 



(H'J^ 



» 



Sect. XIV. i. cj. 



J 



OF PLANTS. 



a^ 



1 



thofpernium, ftone-feed; and 



pie. This mucor is a pi 



f the fungus kind, which will grow without light 



C3 



ke other fungrufes 



o 



d with its roots penet 



or change of 

 the vefTels of 



But thefe veflels are probably 



The methods ef preventing or 



deftroying it muft confift in thinning the plant, or removing thofe 



m its vicinity, fo as to admit more light, and greater ventilation, 



the vegetables to which it adh 

 previoufly injured by internal difeafe 



& 



d 



ftore th 



which may at the fame time eradicate the mild 



r 



internal vigour of the plant. 



. As the greater dampnefs of fome land fupplies one permanent 

 caufe of mildew, as well as its being too much overfhadowed by 

 thick foliage, the methods of prevention muft confift in properly 

 draining the land, and ufing drier kinds of manure, as coal-aOies and 

 bone-a(hes, as well as 



by thinning the crops. And laftly 



re- 



commended to fow early in the feafon for the purpofe of procurin 

 forward crops 5 as this difeafe is faid more to injure late crops owin 

 to the^reater dampnefs of the ground in autumn 



o 



Cs 



Rubigo, ruft, a fe 



powder fprinkled under th 



frequent in alchemilla, lady's mantle, rubus faxatilis, effula degener ; 

 and particularly in feuecio or jacob^a; and efpecially in a burnt woody 



foil. 



This is probably another fungus fimilar to the former, or to fom 



kinds of lichen, which 



beneath the leaves of vegetables pre 



vioufly difeafed, and may probably be prevented or deftroyed by ex- 

 pofing the plant to more light, and greater ventilation, as in th« mucor 



above mentioned. 



An account is given by Mr. Lambert in the Tranfadions of the 



Linnean 



.ean Society, Vol. IV. of a difeafe which may probably be forae- 

 what fimilar to the rubigo. which he calls uredo frumenti, or blight 



of wheat, ai 



wheat in wet feafons, when it is nearly ripe, fp as to give the field 



d defcribes it to be a fungus, which covers the ftems of 



.ppearance of being covered with foot 



The ftera of the wh 



T 



faid 



