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June 1, 1913. 
\ 
tia iinawished visitor, Dr. Paul Marchal, Chief of the 
“caters ds wala of Paris; France, recently spent con- 


















= Doctor Marchal, who, besides being one of the bere? 
W ae ara of Europe, is a& most pleasing gentleman. 4 
Within the last year or two some fatal fungous diseases 
ive broke: out in the midst of white-grub ravages and myriads - 
the pests have died, evidently from the effects of some of . 
; diseases. Dr. S. A. Forbes has had large quantities of 
} fungi propagated artificially, and it is expected that 
‘ial will be sent to several assistants of this division, 
mis has not already been done, to be applied in the fields. 
refore the following suggestions relative to the experimen- 
use of one of the most promising of these fungi, may prove. 
C me to members of the force who may have occasion to ap- 
Method of Testing MHTARRHIZIUM ANISOPLIAE Against the 
me White Grub. 
_ As s0Oon as corn is up make a strict search for a field of 
m that is being injured by the grubs. Make certain of an 
ndance of grubs by actual examination 8s well as by the observ- 
injury to the corn plants. ; 
- Each jar of fungous culture contains 100 pieces of inocu- 
54 potato and it is estimated that one piece of potato to a / 
44 ef corn is sufficient. In applying the fungus first thrust 
rowel or sharp-pointed instrument into the soil among the corn 
ts in the hills sor ce ted. with grubs. Push the trowel forward 
ure jar into this opening, and remove the trowel. It is 
sssary to "plant" the piece of potato 2 inches below the sur- 
eb be it is at all per eee: the treatment should be made ~ 
aq aah after an infested field is located, for the 
Ymost of the territory infested in 1912 will become in- 
in June and pupate in July or August. 
T het field should | be visited as often as practicable 
rerul 2 notes: should ‘also be made. on the weather con- “¢ 
+250 mo] ‘ 
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