Le 
. je J 
Fifth Annual Report. 29 
Farms in the neighborhood where infection had not been used 
were in essentially the same condition. Sporotrichum was 
plentiful, but the corn was considerably damaged. 
2.—FIELD EXPERIMENT No. 2. 
Near the University campus was a field of wheat, which we 
will call A, with a corn-field adjoining it on the south, which 
we will call B. No other grain-fields were adjacent to it. On 
the rocky hillsides bordering the wheat-field on the north and 
east chinch-bugs were found early in the spring hibernating 
under the loose surface stones. Early in April the bugs were. 
found in large numbers all over the wheat-field. 
Sporotrichum was distributed in the wheat-field, and later in 
the corn-field, by various methods, as is shown by the following 
notes : 
April 11. Sprayed with the squash culture of Sporotrichum 
on the north side of field A. The bugs were thick and the 
ground was dry. 
April 13. Sprayed the same field A, more thoroughly than 
on the llth. Sprayed all around it and through the middle. 
Sprayed with the sprouted Sporotrichum from artificial culture 
in the field B, around it, and some distance in toward the cen- 
ter, on the north side. Bugs were as thick as in A; more than 
a dozen could be found around a single blade of wheat. 
April 16. Could find no Sporotrichum bugs either in A or B. 
April 20. No Sporotrichum bugs; live ones were very thick 
on the lower sides of (south side) A and B. 
April 25. No Sporotrichum bugs found. 
April 27. Sprayed with sprouted Sporotrichum from arti- 
ficial cultures on the south side of field B. Could not find any 
Sporotrichum bugs. 
May 1. No Sporotrichum could be found; soil very dry. 
May 2. Rain fell late in the afternoon. 
May 4. Bugs to all appearances were healthy. Could find 
no Sporotrichum. Sprayed field A. Scattered Sporotrichum 
bugs in B; had about one gallon of earth from infection-box 
containing bugs covered with Sporotrichum, and this was scat- 
tered on the south side of the field. The ground was moist and 
in good condition. It was as we like to have it in our infec- 
tion-boxes. 
