10 



plants without squares. The application of poison, though not meas- 

 ured, was heavy in comparison with those tests in which the poison 

 was sifted from a sack, so that it must have been much heavier than 

 at tlie rate of 20 pounds per acre (as conservatively stated in Table I). 

 The total number of weevils used was 173. The average time elapsing 

 between the application and the last examination was 48 hours. The 

 number of weevils found alive in the four experiments was 37.49 per 

 cent, dead 39.94 per cent, and missing ^•2.02 per cent of the total 

 number treated. 



T.\BLE I. — liesiill'i of frratmi'iit of aAton iihjiit'< vith <lrij Paris ijreei). 



Poison sifted from a sack. — Five tests (Table I, Nos. 0, 7, 8, 9, 10) 

 were made at Victoria on seppa plants without squares. In tests 8, 9, 

 and 10 the plants were sprayed lightly to give dew conditions. The 

 total number of weevils used was 371, and the average time before 

 making tlie last examination was 42^ hours. The number of live wee- 

 vils found was 24.09 per cent and the dead 25.33 per cent of the total 

 number treated, while 49.69 per cent were missing. In three of the 

 tests the exact amount of poison used is recorded and was at the rate 

 of 20, 33, and 45 pounds per acre, respectively, where plants are 2 by 4 

 feet apart. 



Two tests (Table I, Xos. 11, 12) were made upon seppa plants bear- 

 ing squares. In one test with 95 weevils on 39 plants the last exami- 

 nation, made at the end of 9Q hours, showed 21.87 per cent alive, 

 24.21 per cent dead, and 54.54 per cent missing. Poison was used at 

 the rate of 41 pounds per acre. The second test was made upon 93 

 weevils on 38 plants. At the last examination at the end of 96 hours 

 3.12 per cent were alive, 41.93 per cent dead, and 54.95 per cent miss- 

 ing. The rate of poison used was 73 pounds per acre. Wherever the 

 poison was applied so heavily the plants were very badly injured. 



211 



