TABLE VI 
2nd BAT EXPERIMENT AT THE COCOA BOARD, LA REUNION, 1959. 

Date of 
observations Feb, 4 Feb, 6 Feb, 12 Feb. 17 Feb, 25 
Live bats flying 
after spraying 129 117 11 17 1 
Dead bats after 
spraying 0 10 56 10 0 

In a period of just over three weeks the population of flying bats 
fell from 195 to 1, and 76 dead bats were recovered. From these figures 
it would appear that about 61% of the bats were repelled and about 39% 
killed. The untreated house C retained a steady population of about 15 
bats over the same observation period and did not absorb many of the 
migrants from house B. A check carried out one year later revealed no 
reinfestation of house B. 
EASTERN CARIBBEAN FARM INSTITUTE EXPERIMENT 
A final experiment was carried out on two houses, D and E, about 
one-quarter mile west of house number 11. These houses were again of 
a different construction, long, rectangular and two storied, but with 
only about four inches of space between the roof and the ceiling sheets, 
demanding a different spraying technique. The objective here was essen- 
tially to rid the roof space of bats and, as there was no means of 
removing the dead bodies, to prevent bats dying in situ. Application 
had to be made from the outside through ventilation holes located on 
either side of the longest walls of the house (Figure 2). Almost twice 
the volume of liquid was needed and it was decided to use B,H.C. at the 
low rate, The houses had similar bat populations before spraying and 
only one of them was treated; namely, house D, on the 10th of March, 
1959 (Table VII). The bats were successfully eradicated in three to 
four weeks and house D has remained free of bats for almost one year. 
