Table 5. Yield Summary Statistics for Florida,
Georgia, and Louisiana, Years 1988
and 1989
Chemical Mean Variance Minimum Maximum
. —. —bushels per acre
All Regionsa
|
Scout |
29.95 |
111.54 |
13.24 |
44.97 |
|
Karate |
29.81 |
154.57 |
11.80 |
53.68 |
|
Orthene |
29.63 |
136.26 |
12.69 |
47.23 |
|
Penncap M |
28.67 |
143.90 |
11.47 |
48.30 |
|
Baythroid |
29.70 |
152.33 |
11.30 |
49.67 |
|
Control |
27.09 |
142.07 |
9.66 |
48.55 |
|
Florida | ||||
|
Scout |
18.38 |
15.06 |
13.24 |
27.33 |
|
Karate |
20.62 |
25.49 |
13.19 |
28.85 |
|
Orthene |
16.88 |
9.91 |
12.69 |
22.71 |
|
Penncap M |
18.48 |
7.85 |
13.09 |
26.48 |
|
Baythroid |
17.67 |
11.52 |
13.86 |
25.89 |
|
Ambush |
18.94 |
25.84 |
11.55 |
26.97 |
|
Control |
18.49 |
21.77 |
10.35 |
25.75 |
|
Georgia | ||||
|
S∞ut |
22.48 |
35.97 |
16.36 |
35.78 |
|
Karate |
22.21 |
132.16 |
11.80 |
53.68 |
|
Orthene |
22.47 |
40.59 |
13.89 |
36.46 |
|
Penncap M |
18.61 |
49.84 |
11.47 |
40.42 |
|
Baythroid |
23.14 |
99.01 |
11.30 |
49.00 |
|
Control |
17.01 |
36.26 |
9.66 |
27.64 |
|
Louisiana | ||||
|
S∞ut |
39.07 |
25.31 |
27.32 |
44.97 |
|
Karate |
40.12 |
44.04 |
22.50 |
47.59 |
|
Orthene |
41.38 |
13.42 |
34.37 |
47.23 |
|
Penncap M |
38.76 |
48.08 |
20.33 |
48.30 |
|
Baythroid |
40.64 |
38.47 |
28.28 |
49.67 |
|
Control |
38.95 |
27.65 |
27.79 |
48.55 |
aAII regions denotes the three states Florida, Georgia,
and Louisiana.
bu∕acre in Louisiana is relatively high, and 20
bu∕acre in Georgia is not unexpected. Stink bug
density in Florida was light for both years, never
reaching the economic threshold in 1989. For Geor-
gia, stink bugs exceeded the economic threshold in
1988 and 1989, and in Louisiana the damage was
relatively light in 1988 but increased in 1989. Either
low yield, high damage, or a combination of these
factors resulted in insufficient revenue to cover all
expenses. In terms of expected value analysis for all
regions, Baythroid is the efficient chemical when
considering profit, although Scout dominated in
yield and protection against stink bug damage. For
Table 6. Damage (Percent Kernels Damaged by
Stink Bug Feeding)Summary Statistics
for Florida, Georgia, and Louisiana,
Years 1988 and 1989
Chemical Mean Variance Minimum Maximum
|
. . |
.....percent.......... | |||
|
All Regionsa | ||||
|
Scout |
4.82 |
18.39 |
0.00 |
21.00 |
|
Karate |
5.50 |
26.64 |
0.00 |
18.00 |
|
Orthene |
5.11 |
19.21 |
0.00 |
18.00 |
|
Penncap M |
5.02 |
20.35 |
0.00 |
20.00 |
|
Baythroid |
4.83 |
15.53 |
0.00 |
18.00 |
|
Control |
7.00 |
25.50 |
0.00 |
20.00 |
|
Florida | ||||
|
Scout |
6.13 |
7.36 |
2.00 |
11.00 |
|
Karate |
8.38 |
16.48 |
4.00 |
15.00 |
|
Orthene |
5.88 |
9.11 |
3.00 |
13.00 |
|
Penncap M |
7.75 |
10.44 |
3.00 |
14.00 |
|
Baythroid |
7.00 |
4.75 |
5.00 |
12.00 |
|
Ambush |
7.50 |
5.25 |
4.00 |
11.00 |
|
Control |
7.63 |
6.48 |
5.00 |
13.00 |
|
Georgia | ||||
|
Scout |
6.83 |
39.14 |
1.00 |
21.00 |
|
Karate |
7.33 |
42.56 |
1.00 |
18.00 |
|
Orthene |
7.67 |
30.39 |
1.00 |
18.00 |
|
Penncap M |
7.06 |
31.56 |
1.00 |
20.00 |
|
Baythroid |
6.58 |
26.91 |
0.00 |
18.00 |
|
Control |
11.08 |
30.91 |
3.00 |
20.00 |
|
Louisiana | ||||
|
Scout |
3.10 |
4.29 |
0.00 |
9.00 |
|
Karate |
2.69 |
5.21 |
0.00 |
7.00 |
|
Orthene |
2.81 |
5.40 |
0.00 |
9.00 |
|
Penncap M |
2.75 |
5.77 |
0.00 |
10.00 |
|
Baythroid |
2.44 |
2.00 |
0.00 |
4.00 |
|
Control |
3.63 |
6.86 |
0.00 |
8.00 |
aAII regions denotes the three states Florida, Georgia,
and Louisiana.
individual states, considering profit, Baythroid re-
mains dominant in both Georgia and Louisiana,
whereas Karate is dominant in Florida. Baythroid is
also dominant in yield and crop damage with the
exception of Orthene for crop damage in Florida and
crop yield in Louisiana. Methyl parathion (Penncap
M) was not dominant in terms of expected value
analysis, indicating that efficient alternatives to this
toxic chemical may exist. The price increase of over
15 percent for methyl parathion from 1987 to 1989
may partially account for this.
88