180 
JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 11 
and tomato were used at a rate, by weight, equivalent to 10 lemons to 
25 pounds of bran. In the table the orange was given the value of 1 for 
purposes of comparison. 
In Series D will be found a comparison between canteloupe and to¬ 
mato and canteloupe and watermelon. In experiments numbers 61,63, 
65 and 67 a total of 191 hoppers were recorded at canteloupe combina¬ 
tions and 169 at tomato combinations, a negligible difference appar¬ 
ently. In numbers 66 to 76, exclusive of 67, canteloupe and water¬ 
melon combinations are comparable. 1 The total hoppers recorded for 
the canteloupe was 339 and for the watermelon 337. 
Series E affords a comparison of canteloupe, tomato, orange, water¬ 
melon and lemon used in amounts varying according to their cost in 
the local market. As a matter of fact nearly every farmer in the Salt 
River Valley and other irrigated sections of the Southwest can secure 
without expense cull canteloupes, watermelons or tomatoes of good 
enough quality for use in grasshopper baits. The total number of 
hoppers recorded in the experiments which can be grouped for fruit 
comparisons was 870. The comparative rank is shown in Table II. 
It should be noted that canteloupe in three other experiments in this 
series, used at the 5-25 rate as a check, was unusually low, ranking as .74. 
This is the only instance in these experiments when canteloupe com¬ 
binations did not have a somewhat better record than lemon or orange. 
Series F consists of a field test on a small scale of baits containing 
Paris green. The mixtures were applied to areas of approximately 
1/100 acre each, the fruits being used on the basis of the market value 
as in Series E. The records refer to the number of dead hoppers 
counted in each poisoned area. This, however, was found not to be 
a satisfactory basis for comparison since only a minority of the hoppers 
died within the poisoned area. As they stand the records show a total 
of 200 dead hoppers counted, or an average of 16f to each plot, the 
different fruit mixtures ranking as indicated in Table II. It should 
be noted that two other mixtures without fruit were used, bran, mo¬ 
lasses, water and Paris green ranking as 1.1 and bran, water and Parish- 
green as .45, the lowest of all in the Series. 
In regard to the amount of fruit to be used in the poisoned bait these 
experiments are far from conclusive. In Series A the results showed 
no advantage in increasing the rate at which lemons were used from 
2| to 5 and to 7\ with 25 pounds of bran. With the lowest rate, 
No. 12, 65 hoppers were recorded at the bait while the average for 
two experiments at the 5-25 rate and one at the 7§-25 rate was 67 
1 The watermelon combinations differ from those of the canteloupe in having mo¬ 
lasses in two instances and in having a double standard amount in two instances. 
