THE SUGAR-CANE MOTH BORER. 45 
citronella; (15) oil of wintergreen; (16) oil of cinnamon; (17) for- 
maldehyde solution ; (18) pennyroyal; (19) fluid extract of valerian. 
No borer moths and very few other insects were captured. 
REACTION OF ADULTS TO LIGHTS. 
Attracting the adults to lights has been proposed occasionally as a 
means of controlling the moth borer. It seems evident, however, that 
lights can exercise little attraction for them. The moths avoid the 
sunlight and remain concealed during the day in dark places, such as 
between the leaves and the stalk of a sugar-cane plant. If disturbed 
they fly for a short distance, seeking another place of concealment. 
As dusk approaches, however, they become very active, but daylight 
finds them motionless again. 
Experiments have been conducted with insect light traps, which are 
so constructed that insects which fly to the light will be killed by a 
poisonous gas and fall into a jar, from which they may be removed at 
the convenience of the collector. A commercial moth trap was used. 
Some of the traps were fitted with glasses of various colors, so that 
they would throw colored lights, and they were equipped with electric 
lights of high candlepower in addition to the kerosene lamps with 
which they were furnished by the manufacturers. 
In September, 1914, a light trap was. placed about 20 feet from a 
plat of young corn which was heavily infested by the moth borer. A 
clear light of about 60 candlepower was used. The trap was run on 
16 nights between September 16 and October 13. The catch of borer 
moths was as follows : 
Sept. 16 4 males, 1 female. 
Sept. 17 :: 13 males. 
Sept. 18 18 to 20 males, 4 females. 
Oct. 6 .— 1 male. 
Oct. 9 . 4 males. 
Oct. 10 1 male. 
Total males 41 to 43. 
Total females 5 
Borer moths were caught on only about one-third of the nights 
during which the trap was operated, and practically no females were 
secured. The few females caught apparently had deposited their eggs 
already. 
A much more elaborate series of experiments was conducted in 
1915. From May 12 to June 18 five traps were operated with kerosene- 
oil lamps, the traps being fitted to throw lights of the following colors : 
Green, yellow, clear (uncolored), red, blue. As no borer moths were 
caught, the traps were provided with carbon-filament incandescent 
electric lights, 100 watts, 120 volts, candlepower about 80. A mottled 
brown and yellow glass was substituted for the yellow, which had 
