THE farmer’s Manual. 
79 
at the time of the filling of the kernel in the oar, the 
warm rains, or warm moist weather, cause an exhala- 
tion from the surface of the earth on which the wheat 
grows, which lodges upon the straw, and forms fun- 
gus excrescences, of the toadstool kind, and that these 
excrescences absorb the juices of the straw for their 
support, and thus check their natural course to the 
support of the kernel, which cavtses it to shrink, or 
blast. 
Remarks. 
So much of this is true, that the rust on wheat gene- 
rally commences at this time, and under these circum- 
stances, viz. in w’arm rains; or a long season of warm, 
moist weather. But does not this combination of heat 
and moisture, at this lime, bring into action the rich 
manures, and thus force into fhe straw, (which has 
now finished its growth,) more juices than the kernel, 
(already filled out,) can take up, or than can pass oil' 
by natural perspiration, or evaporation? and do not 
these juices force open, or burst the straw, and thus 
sulTer the sap to exude through these small fissures, 
or openings, or even through the natural pores of the 
straw, or stalk? and do not these exudations, when 
exposed to the air, become glutinous, and form that 
excrescence upon the straw called rust, and thus rob 
the kernel of its natural sujtport, and cause it to shrink, 
or blast? It is not so essential in this instance to 
know the manner in which the eft’ect is produced, as 
to know the true cause and the best remedy. The 
true cause is the application of rich manures to the 
cultivation of wheat, upon a strong, or rich soil ; or 
their too frequent application, or too long continu- 
ance upon light, or moderate soils ; both are danger- 
ous, and admit of but one remedy, and even that a 
partial one. Cut down youf wheat as soon as the 
kernel becomes affected, and begins to shrink, and 
let it cure in the gavil ; the exuding fissures, and 
pores, will immediately close, and the remaining 
