86 REpPorRT OF THE BOTANIST OF THE 
worth mentioning; but flea-beetles were plentiful and poison 
was used frequently in an attempt to kill them. Their ravages 
were certainly lessened and some dead flea beetles were actually 
found. 
Series III.— Series II] also consisted of four rows — Nos. 3, 6, 
9 and 12. This series was not sprayed at all with bordeaux mix- 
ture and only once (July 11) with poison, consisting of 8 
ounces of “ green arsenoid ” in 50 gallons of dilute lime water. 
There were so few “ bugs” that the average farmer would have 
considered it unnecessary to apply poison. 
THE RESULTS OF THE EXPERIMENTS. 
AS INDICATED BY THE CONDITION OF THE FOLIAGE. 
At Geneva.— Potato “ bugs ” did no appreciable damage to any 
of the plats. Twice they appeared in large numbers, but were 
promptly killed before they did any damage, and thus their ray- 
ages were practically eliminated from the experiment. 
A few “ bugs ” were observed at the time of the first spraying 
of series II (June 25), but it was not thought necessary to poison 
them. They first appeared in destructive numbers about July 9. 
On that date it was found that many colonies had hatched and 
were just commencing to feed. On this account the entire field 
was treated on July 10. On series I and II the paris green was 
added to the bordeaux, and on series III it was used alone in 
lime water. The “bugs” were nearly all killed. On July 15 the 
only living “ bugs ” which could be found were a few full-grown 
beetles. The old ones appear to be more difficult to poison. 
As late as July 23 only an occasional “bug” could be found, 
but on July 25 a new brood began to hatch, and it was observed 
that they were nearly all on the rows of series III, which had 
not been sprayed with bordeaux. In view of the fact that the © 
paris green applied on July 10 had killed the “bugs” about 
equally well on all three plats, it is worthy of note that the new 
brood appeared almost entirely on series III. It appears that 
the old beetles shunned the plants covered with bordeaux and 
laid their eggs only on the unsprayed rows. 
