REPORT OF EXPERIMENTS AT LA FAYETTE, 
INDIANA. 
By F. M. WEBSTER. 
I.—IMPORTED CABBAGE WoRM. (Pieris rape Sch.) 
EXPERIMENT 1.—ICE WATER. 
(August 4, 1885.) 
Temperature of atmosphere about plants, 99° F. Temperature of water, 
40° F. Drenched two cabbage plants, now well headed and seriously 
infested. 
RKesult.—None perceptible. . 
EXPERIMENT 2.—ICE WATER. 
Temperature of atmosphere, 104° I’. Temperature of water, 38° F. 
Drenched two plants. 
Kesult.—None are injured, and only seem to have been displaced. 
EXPERIMENT 3.—ICE WATER. 
August 4, 1885.—Temperature of atmosphere, 98° F. Temperature of 
water, 36° F. Drenched plants as before. 
Result.—A number were washed off, but none died from the effects of 
their cold bath. 
EXPERIMENT 4.—ICE WATER. 
Temperature of atmosphere, 98° F. Temperature of water, 34° F, 
Plant seriously infested, larve from 2 inch long tofull grown. Drenched 
at 1.45 p. m., September 11, 1885, by pouring one quart water on head 
of plant, thoroughly wetting all larve visible. 
Result.— At 5 p.m. all worms have returned to the leaves and are 
actively feeding. 
EXPERIMENT 5.—ICE WATER. 
Temperature of atmosphere, 96° F. Temperature of water, 34° F. 
September 19, 12.45 p. m., poured water from pitcher on two plants. 
Result——On one plant, worms, even the smallest, $ inch long, were 
aninjured; on the other two small worms were found dead soon after. 
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