44 BULLETIN 746, U. S. DEPARTMENT OF AGBICULTURE. 
64 cents per acre. The apparatus used in the test is illustrated in 
Plate VII. 
A 125-acre field at Belle Alliance Plantation near Donaldsonville, 
La., which was naturally divided into approximately 5-acre plats by 
drainage ditches, was selected for the experiment. One plat was 
poisoned once a week during the nine weeks from April 19 to June 14, 
while other plats received from one to four applications of 2 pounds 
per acre at weekly and fortnightly intervals, beginning at different 
dates during the nine weeks' period. The season was rather dry and 
rain did not interfere with the work any more than might be ex- 
pected under Louisiana conditions. 
Borer eggs- and " dead hearts " were observed throughout the 
spring and summer in the various plats, and in October, when status 
examinations were made, considerable variation was found in the dif- 
ferent plats, but no relationship between the poisoning and borer in- 
festation could be established, the treatment evidently having no ef- 
fect whatever. This is probably due to the fact that the poison did 
not enter the central whorl or " throat " of the plants, where the 
young larvae were feeding. 
These experiments will indicate to the reader just how difficult is 
the control of the sugar-cane borer, and how inefficient are the usual 
methods of repression when used against it. For a long time the 
application of poison to sugar cane was regarded as hardly practi- 
cable, but when tried it was found to be not prohibitive as to cost or 
labor, although of absolutely no benefit. 
EEACTION OF ADULTS TO HONEY AND OTHEK BAITS. 
In the control of certain pests of vineyards in Europe, baits com- 
posed of fermenting molasses and other substances have been re- 
ported as successful in attracting the adults. In fact the use of these 
baits appears to be a well-established practice in some communities. 
It is also well known that collectors often make use of a mixture of 
stale beer or rum and brown sugar for attracting certain night-flying 
moths. It was thought worth while, therefore, to test the attraction 
of various chemicals and mixtures to borer moths. 
Five modified flytraps were hung in cane and corn fields known to 
be infested. All the traps were baited with the same substance at a 
time, and were left in the fields for at least 24 hours. The following 
mixtures and chemical compounds were experimented with: (1) 
Honey; (2) honey, water, and alcohol; (3) 1 part honey dissolved in 
3 parts alcohol; (4) stale beer, low-grade sugar, and alcohol; (5) 
stale beer and sugar; (6) oil of anise; (7) imitation strawberry 
sirup; (8) orange-flower sirup ; (9) cedar oil; (10) solution of citric 
acid; (11) pyridin; (12) xylene; (13) vanilla extract; (14) oil of 
