Nematode Management
Investigations in Mississippi, 1997
| Table
1. Effect of Vydate C-LV on population development of the root-knot
nematode on Sure Grow 125 cotton. 1 |
| Treatment
2 |
Rate
per
acre3 |
Application
method |
M.
incognita / 250 cm3 soil at 0-144 days after planting |
Mean4 |
| 0 |
36 |
67 |
82 |
103 |
144 |
| Vydate C-LV |
4 oz |
6 th
true leaf stage5
+ 14 days |
592.3 ab |
592.3 ab |
523.0 a |
240.3 c |
1,536.4 abc |
1,133.0 ab |
769.6 ab |
| Vydate C-LV |
8 oz |
6th
true leaf stage5
+ 14 days |
669.5 ab |
291.8 c |
540.8 a |
463.5 abc |
978.5 c |
1,218.8 ab |
693.8 b |
| Vydate C-LV |
16 oz |
6th
true leaf stage5
+ 14 days |
566.5 ab |
437.8 abc |
557.9 a |
197.4 c |
927.0 c |
815.4 ab |
583.7 b |
| Vydate C-LV |
4 oz |
6th
true leaf stage5 |
321.9 b |
394.8 abc |
497.8 a |
369.1 bc |
1,244.6 abc |
1,193.1 ab |
678.8 b |
| Vydate C-LV |
8 oz |
6th
true leaf stage5 |
521.4 ab |
377.7 abc |
266.1 a |
369.1 bc |
1,339.0 abc |
635.2 b |
584.7 b |
Vydate C-LV
+ Gaucho |
8 oz +
4 oz ai/cwt |
6th
true leaf stage5
+ seed treatment |
605.1 ab |
343.3 bc |
824.0 a |
643.8 abc |
875.5 c |
995.7 ab |
714.6 a |
| Temik 15G |
3.5 lb |
In-furrow |
869.1 a |
549.3 abc |
660.9 a |
600.0 abc |
1,896.9 a |
1,124.4 ab |
950.1 a |
| Temik 15G |
5 lb |
In-furrow |
630.9 ab |
291.8 c |
686.7 a |
892.7 a |
1,699.5 ab |
1,527.8 a |
954.9 a |
| Di-Syston 8EC |
1 lb ai |
In-furrow |
540.8 ab |
506.4 abc |
763.9 a |
489.3 abc |
1,072.9 bc |
1,330.4 ab |
784.0 a |
| Control |
-- |
-- |
618.0 ab |
635.2 a |
712.4 a |
712.4 ab |
1,072.9 bc |
1,476.3 ab |
997.1 ab |
|
| LSD (P = 0.05) |
|
410 |
268 |
690 |
447 |
688 |
542 |
228 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Vydate C-LV was applied at the 6 to 7 true leaf stage
on June 25, 1997, and 14 days later on July 9, 1997. All Vydate
C-LV plots received Temik 15G at 3.5 pounds of formulated product
per acre in the seed furrow at planting.
3Rates were calculated based on 38-inch row spacing.
4Average root-knot nematode population density across
all sample dates.
5Pinhead square. |
|
Table 2. Effect of Vydate C-LV applied as a foliar spray on plant
survival and height of Sure Grow 125 cotton in a field infested
with the root-knot nematode. 1 |
| Treatment
2 |
Rate
per acre3 |
Application
method |
Seedling
stand4 |
Plant
height 23 and 87 days after 2 nd Vydate application 5 |
| 23 |
87 |
|
in |
in |
| Vydate C-LV |
4 oz |
6th
true leaf stage 6
+ 14 days |
199 a |
37.6 bcde |
41.73 bc |
| Vydate C-LV |
8 oz |
6th
true leaf stage6
+ 14 days |
178 b |
39.6 abc |
44.7 ab |
| Vydate C-LV |
16 oz |
6th
true leaf stage 6
+ 14 days |
189 ab |
38.2 bcd |
44.90 ab |
| Vydate C-LV |
4 oz |
6th
true leaf stage 6 |
193 ab |
40.2 ab |
42.63 abc |
| Vydate C-LV |
8 oz |
6th
true leaf stage 6 |
197 a |
37.5 bcde |
40.60 cd |
Vydate C-LV
+
Gaucho |
8 oz +
4 oz ai/cwt |
6th
true leaf stage 6 |
183 ab |
38.2 bcde |
44.50 ab |
| Temik 15G |
3.5 lb |
In-furrow |
184 ab |
37.2 cde |
41.83 bc |
| Temik 15G |
5 lb |
In-furrow |
183 ab |
41.5 a |
45.33 a |
| Di-Syston 8EC |
1 lb ai |
In-furrow |
178 b |
35.8 de |
41.67 bc |
| Control |
-- |
-- |
184 ab |
35.4 e |
37.37 d |
|
| LSD (P=0.05) |
|
18 |
2.8 |
3.44 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Vydate C-LV was applied at the 6 to 7 true leaf stage
on June 25, 1997, and 14 days later on July 9, 1997. All Vydate
C-LV plots received Temik 15G at 3.5 pounds of formulated product
per acre in the seed furrow at planting.
3Rates were calculated based on 38-inch row spacing.
4Number of live plants per 40 feet of row; all rows received
210 seed.
5Plant height recorded on August 1, 1997, and October
4, 1997.
6Pinhead square. |
|
Table 3. The effect of Vydate C-LV on the number of bolls produced
at the 1st, 2nd, and 3rd fruiting
position on Sure Grow 125 cotton in a field infested with the root-knot
nematode. 1 |
| Treatment
2 |
Rate
per acre3 |
Application
method |
Open
bolls4 |
Total
open bolls
per plant |
| Position 1 |
Position 2 |
Position 3 |
| Vydate C-LV |
4 oz |
6th
true leaf stage 5
+ 14 days |
24.67 ab |
13.33 a |
7.0 a |
45.00 ab |
| Vydate C-LV |
8 oz |
6th
true leaf stage 5
+ 14 days |
25.23 a |
15.33 a |
8.0 a |
48.67 a |
| Vydate C-LV |
16 oz |
6th
true leaf stage 5
+ 14 days |
19.33 c |
12.67 a |
4.3 abcd |
36.33 bc |
| Vydate C-LV |
4 oz |
6th
true leaf stage 5 |
23.00 abc |
13.33 a |
6.7 ab |
43.00 ab |
| Vydate C-LV |
8 oz |
6th
true leaf stage 5 |
21.00 bc |
15.00 a |
6.0 abc |
42.00 ab |
Vydate C-LV
+
Gaucho |
8 oz +
4 oz ai/cwt |
6th
true leaf stage 5 |
23.67 ab |
12.33 a |
7.3 a |
43.33 ab |
| Temik 15G |
3.5 lb |
In-furrow |
26.00 a |
16.33 a |
6.3 abc |
48.67 a |
| Temik 15G |
5 lb |
In-furrow |
23.33 ab |
10.33 ab |
1.0 cd |
34.67 bc |
| Di-Syston 8
EC |
1 lb ai |
In-furrow |
21.00 bc |
13.33 ab |
1.3 bcd |
35.67 bc |
| Control |
-- |
-- |
21.00 bc |
5.67 b |
0.3 d |
27.00 c |
|
| LSD (P=0.05) |
|
3.93 |
6.46 |
5.36 |
10.78 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Vydate C-LV was applied at the 6 to 7 true leaf stage
on June 25, 1997, and 14 days later on July 9, 1997. All Vydate
C-LV plots received Temik 15G at 3.5 pounds of formulated product
per acre in the seed furrow at planting.
3Rates were calculated based on 38-inch row spacing.
4Average number of cotton bolls produced per plant in
each fruiting position. Position 3 includes the summation of all
bolls at position 3 and above.
5Pinhead square. |
|
Table 4. The effect of Vydate C-LV on the weight of open bolls produced
at the 1st, 2nd, and 3rd fruiting
positions of Sure Grow 125 cotton in a field infested with the root-knot
nematode. 1 |
| Treatment
2 |
Rate
per acre3 |
Application
method |
Seed
cotton weight4 |
Total
seed cotton weight per plant |
| Position 1 |
Position 2 |
Position 3 |
|
g |
g |
g |
g |
| Vydate C-LV |
4 oz |
6th
true leaf stage 5
+ 14 days |
105.97 ab |
49.33 a |
8.43 bcd |
163.73 abc |
| Vydate C-LV |
8 oz |
6th
true leaf stage 5
+ 14 days |
112.30 a |
56.63 a |
27.17 a |
196.10 a |
| Vydate C-LV |
16 oz |
6th
true leaf stage 5
+ 14 days |
84.67 cd |
47.10 a |
16.60 abcd |
148.37 bc |
| Vydate C-LV |
4 oz |
6th
true leaf stage 5 |
104.77 ab |
53.50 a |
24.60 ab |
182.90 ab |
| Vydate C-LV |
8 oz |
6th
true leaf stage 5 |
97.63 abc |
57.23 a |
15.63 abcd |
170.50 abc |
Vydate C-LV
+
Gaucho |
8 oz +
4 oz ai/cwt |
6th
true leaf stage 5 |
106.63 ab |
57.47 a |
28.97 a |
193.07 a |
| Temik 15G |
3.5 lb |
In-furrow |
102.50 abc |
58.27 a |
20.43 abc |
181.20 abc |
| Temik 15G |
5 lb |
In-furrow |
116.00 a |
36.33 ab |
30.93 cd |
156.27 abc |
| Di-Syston 8EC |
1 lb ai |
In-furrow |
87.83 bcd |
47.77 a |
3.80 cd |
139.40 c |
| Control |
-- |
-- |
71.90 d |
16.50 b |
9.50 d |
88.90 d |
|
| LSD (P=0.05) |
|
19.5 |
23.57 |
18.07 |
43.15 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Vydate C-LV was applied at the 6 to 7 true leaf stage
on June 25, 1997, and 14 days later on July 9, 1997. All Vydate
C-LV plots received Temik 15G at 3.5 pounds of formulated product
per acre in the seed furrow at planting.
3Rates were calculated based on 38-inch row spacing.
4Average cotton weight (g) produced per plant in each
fruiting position. Position 3 includes the summation of all cotton
weight at position 3 and above.
5Pinhead square. |
|
Table 5. Effect of Vydate C-LV on the number of nodes produced and
the first fruiting node on Sure Grow 125 cotton in a field infested
with the root-knot nematode.1 |
| Treatment2 |
Rate
per acre3 |
Application
method |
Nodes
per plant |
Node of first
fruiting branch |
| Vydate C-LV |
4 oz |
6th
true leaf stage
+14 days |
21.23 a |
6.33 abc |
| Vydate C-LV |
8 oz |
6th
true leaf stage 4
+14 days |
21.67 a |
5.67 bc |
| Vydate C-LV |
16 oz |
6th
true leaf stage 4
+14 days |
21.17 a |
7.00 ab |
| Vydate C-LV |
4 oz |
6th
true leaf stage th |
21.57 a |
6.73 abc |
| Vydate C-LV |
8 oz |
6th
true leaf stage 4 |
21.10 a |
5.67 bc |
Vydate C-LV
+
Gaucho |
8 oz +
4 oz ai/cwt |
6th
true leaf stage 4 |
20.97 a |
5.47 c |
| Temik 15G |
3.5 lb |
In-furrow |
21.20 a |
5.90 bc |
| Temik 15G |
5 lb |
In-furrow |
21.20 a |
6.57 abc |
| Di-Syston 8EC |
1 lb ai |
In-furrow |
21.00 a |
6.43 abc |
| Control |
-- |
-- |
20.43 a |
7.63 a |
|
| LSD (P=0.05) |
|
1.85 |
1.46 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Vydate C-LV was applied at the 6 to 7 true leaf stage
on June 25, 1997, and 14 days later on July 9, 1997. All Vydate
C-LV plots received Temik 15G at 3.5 pounds of formulated product
per acre in the seed furrow at planting.
3Rates were calculated based on 38-inch row spacing.
4Pinhead square. |
|
Table 6. Effect of Vydate C-LV applied as a foliar spray on the
yield of Sure Grow 125 cotton in a field infested with the root-knot
nematode. 1 |
| Treatment2 |
Rate
per acre3 |
Application
method |
Seed
Cotton |
Seed
Cotton |
Yield
over control |
|
lb/plot |
lb/A |
lb/A |
| Vydate C-LV |
4 oz |
6th
true leaf stage 4
+14 days |
17.47 ab |
2,856.5 ab |
1,513.6 |
| Vydate C-LV |
8 oz |
6th
true leaf stage 4
+14 days |
16.72 b |
2,734.4 b |
1391.5 |
| Vydate C-LV |
16 oz |
6th
true leaf stage 4
+14 days |
20.01 a |
3,272.3 a |
1,929.4 |
| Vydate C-LV |
4 oz |
6th
true leaf stage 4 |
18.84 ab |
3,080.5 ab |
1,737.6 |
| Vydate C-LV |
8 oz |
6th
true leaf stage 4 |
16.38 b |
2,678.3 b |
1,335.4 |
Vydate C-LV
+
Gaucho |
8 oz +
4 oz ai/cwt |
6th
true leaf stage 4 |
17.62 ab |
2,881.3 ab |
1,538.4 |
| Temik 15G |
3.5 lb |
In-furrow |
16.70 b |
2,729.9 b |
1,387.0 |
| Temik 15G |
5 lb |
In-furrow |
20.01 a |
3,271.0 a |
1,928.1 |
| Di-Syston 8EC |
1 lb ai |
In-furrow |
12.53 c |
2,048.2 c |
705.3 |
| Control |
-- |
-- |
8.21 d |
1,342.9 d |
-- |
|
| LSD (P=0.05) |
|
3.09 |
504.7 |
|
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Vydate C-LV was applied at the 6 to 7 true leaf stage
on June 25, 1997, and 14 days later on July 9, 1997. All Vydate
C-LV plots received Temik 15G at 3.5 pounds of formulated product
per acre in the seed furrow at planting.
3Rates were calculated based on 38-inch row spacing.
4Pinhead square. |
|
Table 7. Effect of Temik 15G on population development of the root-knot
nematode on Sure Grow 125 cotton.1 |
| Treatment2 |
Rate
per acre3 |
Application
method
| M.
incognita / 250 cm3 soil at 0-144 days after planting
|
| 0 |
36 |
67 |
| Control |
-- |
-- |
502.1 a |
300.4 ab |
609.4 a |
| Temik 15G |
3.5 lb |
In-furrow |
476.4 a |
472.1 a |
935.6 a |
| Temik 15G |
5 lb |
In-furrow |
450.6 a |
523.6 a |
961.3 a |
| Temik 15G |
7 lb |
In-furrow |
379.8 a |
257.5 ab |
935.6 a |
Temik 15G +
Temik 15G |
5 lb +
5 lb |
In-furrow +
sidedress |
611.6 a |
163.1 b |
978.5 a |
Temik 15G +
Temik 15G |
5 lb +
10 lb |
In-furrow +
sidedress |
354.1 a |
351.9 ab |
669.5 a |
| Gaucho |
4 oz ai/cwt |
Seed treatment |
527.9 a |
300.4 ab |
609.4 a |
|
| LSD (P=0.05) |
|
407.8 |
305.9 |
683 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Temik 15G sidedress treatments were applied at the 9
to 10 growth stage on July 1, 1997.
3Rates were calculated based on 38-inch row spacing.
4Average root-knot nematode population density across
all sample dates. |
Table 7. Continued.
|
Table 7. Effect of Temik 15G on population development of the root-knot
nematode on Sure Grow 125 cotton.1 |
| Treatment2 |
Rate
per acre3 |
Application
method |
M.
incognita / 250 cm3 soil at 0-144 days after planting |
Mean4 |
| 82 |
103 |
144 |
|
| Control |
-- |
-- |
1,253.2 a |
2,283.2 a |
1,133.0 a |
1,013.6 a |
| Temik 15G |
3.5 lb |
In-furrow |
660.9 |
1,493.5 a |
935.6 a |
829.0 a |
| Temik 15G |
5 lb |
In-furrow |
600.8 |
1,751.0 a |
909.8 a |
866.2 a |
| Temik 15G |
7 lb |
In-furrow |
1,047.2 a |
1,090.1 a |
1,381.9 a |
848.7 a |
Temik 15G +
Temik 15G |
5 lb +
5 lb |
In-furrow +
sidedress |
915.4 a |
1,253.2 a |
1,047.2 a |
829.2 a |
Temik 15G +
Temik 15G |
5 lb +
10 lb |
In-furrow +
sidedress |
935.6 a |
952.8 a |
1,055.8 a |
719.9 |
| Gaucho |
4 oz ai/cwt |
Seed treatment |
927.0 ab |
1,296.1 |
1,562.2 a |
870.5 a |
|
| LSD (P=0.05) |
|
755.2 |
1,416.8 |
688.5 |
298 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Temik 15G sidedress treatments were applied at the 9
to 10 growth stage on July 1, 1997.
3Rates were calculated based on 38-inch row spacing.
4Average root-knot nematode population density across
all sample dates. |
|
Table 8. Effect of Temik 15G on plant survival and the height of
Sure Grow 125 cotton in a field infested with the root-knot nematode.
1 |
| Treatment
2 |
Rate
per acre3 |
Application
method |
Seedling
stand4 |
Plant
height 35 and 96 days after sidedress application5 |
| 35 |
96
|
|
in |
in |
| Control |
-- |
-- |
163.2 a |
37.5 b |
40.6 ab |
| Temik 15G |
3.5 lb |
In-furrow |
162.0 a |
39.8 ab |
41.6 ab |
| Temik 15G |
5 lb |
In-furrow |
119.6 a |
40.0 ab |
42.3 ab |
| Temik 15G |
7 lb |
In-furrow |
165.6 a |
40.6 a |
44.8 a |
Temik 15G +
Temik 15G |
5 lb +
5 lb |
In-furrow +
sidedress |
174.8 a |
39.2 ab |
43.2 ab |
Temik 15G +
Temik 15G |
5 lb +
10 lb |
In-furrow +
sidedress |
156.8 a |
38.3 ab |
41.2 ab |
| Gaucho |
4 oz ai/cwt |
Seed treatment |
155.6 a |
38.5 ab |
39.0 b |
|
| LSD (P=0.05) |
|
27.36 |
3.1 |
4.5 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Temik 15G sidedress treatments were applied at the 9
to 10 growth stage on July 1, 1997.
3Rates were calculated based on 38-inch row spacing.
4Number of live cotton plants per 40 feet of row; all
rows received 210 seed.
5Plant height was measured on August 4, 1997, and October
4, 1997. |
|
Table 9. Effect of Temik 15G on the number of bolls produced at
the 1st, 2nd, and 3rd fruiting
positions on Sure Grow 125 cotton.1 |
| Treatment
2 |
Rate
per acre3 |
Application
method |
Open
bolls4 |
Total
open bolls
per plant |
| Position 1 |
Position 2 |
Position 3 |
| Control |
-- |
-- |
21.0 bc |
5.0 c |
0.6 c |
26.6 b |
| Temik 15G |
3.5 lb |
In-furrow |
25.3 ab |
12.0 ab |
6.6 a |
44.0 a |
| Temik 15G |
5 lb |
In-furrow |
29.3 a |
15.0 ab |
4.3 ab |
48.6 a |
| Temik 15G |
7 lb |
In-furrow |
26.0 ab |
14.3 ab |
4.0 abc |
44.3 a |
Temik 15G +
Temik 15G |
5 lb +
5 lb |
In-furrow +
sidedress |
27.6 ab |
14.6 ab |
5.0 ab |
47.3 a |
Temik 15G +
Temik 15G |
5 lb +
10 lb |
In-furrow +
sidedress |
29.3 a |
16.0 a |
4.3 ab |
49.6 a |
| Gaucho |
4 oz ai/cwt |
Seed treatment |
16.6 c |
8.3 bc |
2.3 bc |
27.3 b |
|
| LSD (P=0.05) |
|
8.1 |
6.6 |
3.3 |
12.9 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Temik 15G sidedress treatments were applied at the 9
to 10 growth stage on July 1, 1997.
3Rates were calculated based on 38-inch row spacing.
4Average number of cotton bolls produced per plant in
each fruiting position. Position 3 includes the summation of all
bolls at position 3 and above. |
|
Table 10. Effect of Temik 15G on the weight of open bolls produced
at the 1st, 2nd, and 3rdfruiting
positions on Sure Grow 125 cotton in a field infested with the root-knot
nematode. 1 |
| Treatment
2 |
Rate
per acre3 |
Application
method |
Seed
cotton weight4 |
Total
seed cotton weight per plant |
| Position 1 |
Position 2 |
Position 3 |
|
g |
g |
g |
g |
| Control |
-- |
-- |
78.07 ab |
18.57 c |
1.26 b |
97.90 b |
| Temik 15G |
3.5 lb |
In-furrow |
111.43 ab |
49.10 ab |
22.13 a |
182.67 a |
| Temik 15G |
5 lb |
In-furrow |
127.00 a |
65.90 a |
11.63 ab |
204.53 a |
| Temik 15G |
7 lb |
In-furrow |
82.20 ab |
62.87 a |
11.50 ab |
156.57 ab |
Temik 15G +
Temik 15G |
5 lb+
5 lb |
In-furrow +
sidedress |
123.43 a |
57.17 a |
18.3 a |
198.90 a |
Temik 15G +
Temik 15G |
5 lb +
10 lb |
In-furrow +
sidedress |
116.87 ab |
59.83 a |
10.40 ab |
187.10 a |
| Gaucho |
4 oz ai/cwt |
Seed treatment |
66.80 b |
29.60 bc |
3.13 b |
99.53 b |
|
| LSD (P=0.05) |
|
51.25 |
25.41 |
12.19 |
76.38 |
1Data
are means of five replications. Means were compared using the least
significant difference test.
2Temik 15G sidedress treatments were applied at the 9
to 10 growth stage in July 1, 1997.
3Rates were calculated based on 38-inch row spacing.
4Average cotton weight (g) produced per plant in each
fruiting position. Position 3 includes the summation of all cotton
weight at position 3 and above. |
|