MAFES Header Return to MSUcares Home Page

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.

A black line that separates the body text from footer information


Mississippi State University logo
Visit: DAFVM || USDA
Search our Site || Need more information about this subject?
Last Modified: Monday, 29-Jul-02 08:11:04
URL: http://msucares.com/pubs/bulletins/b1076t1-10.htm
Mississippi State University is an equal opportunity institution.
Recommendations on this web site do not endorse any commercial products or trade names.