23 
amount of fungi producing such diseases, but we can not pro- 
duce the necessary weather to make it effective. All such 
diseases require two distinct conditions, i. e., a fair amount of 
moisture to make such plants as fungi thrive well, and a lower- 
ed vitality of the bugs to beattacked by the disease. Under 
artificial conditions we have control over both, and can conse- 
quently produce from a small amount of the fungus, a very 
large number of diseased and fungus-covered dead bugs. But 
when we introduce this material among the healthy bugs in our 
fields we loose control over the necessary conditions, and have 
to depend upon the weather that may be prevaling at the time. 
If this isin favor of the death-dealing fungi the introduction of a 
disease will be a success; if not it will do but little good. In 
other words, if the disease is introduced when the weather is 
favorable, good results will follow; if dry, none may be ex- 
pected. 
The disease is chiefly active during the warmer portions of 
the season, and makes but slow progress during the time that 
the bugs hibernate, though autumn rains and warm spells 
during the winter promote the growth of fungi causing them. 
Throughout the region in which the spores of Sporotrichum 
were introduced during the summer of 1894, and where they 
did but little good on account of the almost unparallelled drouth, 
the disease killed the great majority of bugs during the excep- 
tionally warm and open early spring, and also later in the 
spring of 1895, which was very favorable to such a disease. 
DISTRIBUTION OF SPORES IN 1895. 
The demand for diseased chinch-bugs in 1895 was great, but 
not nearly as great as would have been desirable, at least not 
early in the season. ‘To show the interest taken it will be best 
to state how many boxes filled with spores of the disease were 
mailed to the different counties, since in doing so the distribu- 
tion of the chinch-bugs in 1895 is also given. Inafew counties, 
in which the bugs were not found, some farmers evidently took 
time by the forelock by laying in a stock of such spores. 
Petia COUN ccc ota teenetecen sce. 22 Boxes to 12 Farmers. 
PIPL “COUDLYrr is» leeSeeee 6 coe we Us § (BGs a 6 4: 
Blue’ Marth; counby.0% sie ds2 die esis ie 80.2135 Ai tied8 Mh 
SLOW COULD GY sian a1e7e tid ois» le cies eee te a ‘wig 4. 
ERR ACOLETLLY «ute ate Sete ea fs. 3 oo 6 er S06e0-* ‘6 244 bis 
