o The Colorado Experiment Station. 
3 ^ 1 f AincriK is that known as eaily 
Early Blight.-An **™ q eaf / 0 “ g dm our mountains and less 
blight, (JfcwwWimW be distingui shed by black areas 
often at Greeley. _ T foliaee of the plants in early July or 
with concentric rings on the fobag V injurious, simply 
August. It seldom cause, rot of«'««*“»•,*„ „ ,{ ^possible to 
because of its mjuij caused by this fungus as com 
know what per cent, o mj > gast wbere plants are sprayed 
pared with other troubles. larger yields than where not 
with a fungicide, they alway g S 7 the prevention 
sprayed, as the result of con ^' '"^ 2 ^ than Alternaria. 
of the ravages of insects anc ■=, ordinarily amounts to but 
Early Blight Damage m Colorado orfman y^ & storm QC . 
little. During the —^conditions of humidity that 
curred over Colorado tha S we re some days 0 f almost 
are common to the east . that , blight developed 
sets? ss £&£“»~ protobk 10 
sorav Colorado potato fields. steins affected with 
V \he Colored Plate ! llu f t'fNo I fflS- (No. II). 
the fungus diseases. Rlmocto rna No , Rhisoctonia . The 
•s St 
srfr - ““ ,ta ”* r 
sprouts before the ^°h°“letas\ twoorThree years it was thought 
that 2*7 
to Rhisoctonia * This disease affe P J the tops to 
w — s- *. 
Dry SS-SS 
seriously diseased, though ie ^ f ree from disease. The 
to the surface of the ground was dean a “ tree • th . In 
leaves, however were n^stc^ before 
some districts this was so ^ c Others grew a few inches 
reaching the surface of the gio • ase /p he trouble started 
above ground and succumbed t e an d {ollowe d 
in,o to’-n** ** 
'lS"a.“ oV 
disease. 
