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Nematode Management Investigations in Mississippi, 1997


Table 31. Effect of Temik 15G on the number of nodes produced and first fruiting node on Sure Grow 501 cotton in a field infested with the reniform nematode. 1
Treatment2 Rate
per acre3		 Application
method		 Nodes per
plant		 Node of first
fruiting branch
Control -- -- 22.7 a 8.3 a
Temik 15G 3.5 lb In-furrow 25.5 a 7.0 b
Temik 15G 5 lb In-furrow 26.2 a 7.1 b
Temik 15G 7 lb In-furrow 26.6 a 6.8 b
Temik 15G +
  Temik 15G		 5 lb +
  5 lb		 In-furrow +
  sidedress		 25.3 a 6.6 b
Temik 15G +
  Temik 15G		 5 lb +
  10 lb		 In-furrow +
  sidedress		 25.6 a 5.5 c
Gaucho 4 oz ai/cwt Seed treatment 23.9 a 6.7 b

LSD (P=0.05)
4.5 0.9
1Data are means of five replications. Means were compared using the least significant difference test.
2Temik 15G sidedress treatments were applied at the 10 to 12 growth stage on July 1, 1997.
3Rates were calculated based on 40-inch row spacing.



Table 32. Effect of Temik 15G on the yield of Sure Grow 501 cotton in a field infested with the reniform nematode. 1
Treatment2 Rate
per acre3		 Application
method		 Seed
cotton		 Seed
cotton		 Yield over
control

lb/plot lb/A lb/A
Control -- -- 13.22 d   2,161.4 d   --
Temik 15G 3.5 lb In-furrow 16.03 bc 2,620.0 bc 458.6
Temik 15G 5 lb In-furrow 19.10 a   3,123.1 a   961.7
Temik 15G 7 lb In-furrow 18.14 ab 2,966.4 ab 805.0
Temik 15G +
  Temik 15G		 5 lb +
  5 lb		 In-furrow +
  sidedress		 17.27 ab 2,824.3 ab 662.9
Temik 15G +
  Temik 15G		 5 lb +
  10 lb		 In-furrow +
  sidedress		 18.96 a   3,099.1 a   937.7
Gaucho 4 oz ai/cwt Seed treatment 14.18 cd 2,318.8 cd 157.4

LSD (P=0.05)
2.5 406.9
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on 40-inch row spacing.
3Temik 15G sidedress treatments were applied at the 10 to 12 growth stage on July 1, 1997.



Table 33. Effect of Di-Terra on population development of the reniform nematode on Sure Grow 501 cotton.1
Treatment Rate
per acre 2		 Application
method 		R. reniformis / 250 cm2 soil at 0-147 days after planting
0 41 73
Di-Terra 25 lb In-furrow 2,961 a 3,309 b 4,545 ab
Di-Terra 50 lb In-furrow 3,322 a 4,648 ab 3,064 c
Di-Terra 75 lb In-furrow 2,652 a 4,661 ab 3,373 c
Temik 15G 5 lb In-furrow 3,180 a 2,974 b 3,412 bc
Di-Syston 8EC 1 lb ai In-furrow 3,579 a 4,506 ab 5,163 a
Control -- -- 2,356 a 5,523 a 2,820 c

LSD (P=0.05)
1,383 1,881 1,145
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on a 40-inch row spacing.
3Average reniform nematode population density across all sample dates.
4 Rf= (nematode population at harvest/nematode population at planting).


Table 33. Continued.

Table 33. Effect of Di-Terra on population development of the reniform nematode on Sure Grow 501 cotton.1
Treatment Rate
per acre2		 Application
method		 M. incognita / 250 cm2 soil at 0-147 days after planting Mean3 Rf 4
112 147
Di-Terra 25 lb In-furrow 2,639 c 2,395 bc 3,170 a 0.95 ab
Di-Terra 50 lb In-furrow 3,515 bc 2,150 c 3,340 a 0.83 ab
Di-Terra 75 lb In-furrow 3,476 bc 2,137 c 3,260 a 1.11 ab
Temik 15G 5 lb In-furrow 4,674 ab 3,528 a 3,554 a 1.16 a
Di-Syston 8EC 1 lb aiM In-furrow 4,403 ab 1,893 c 3,909 a 0.57 b
Control -- -- 5,176 a 3,000 ab 3,775 a 1.28 a

LSD (P=0.05)
1,496 803 1,098 0.54
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on a 40-inch row spacing.
3Average reniform nematode population density across all sample dates.
4R f= (nematode population at harvest/nematode population at planting).



Table 34. Effect of Di-Terra on plant survival and height of Sure Grow 501 cotton in a field infested with the reniform nematode. 1
Treatment Rate
per acre2		 Application
method		 Seeding
stand3		 Plant
height4		 Plant height
over control

in in
Di-Terra 25 lb In-furrow   89.2 d 40.16 a   3.06
Di-Terra 50 lb In-furrow    91.8 cd 38.02 ab 0.92
Di-Terra 75 lb In-furrow 110.4 c 38.58 ab 1.48
Temik 15G 5 lb In-furrow 137.8 b 39.44 ab 2.34
Di-Syston 8EC 1 lb ai In-furrow 163.4 a 37.78 ab 0.68
Control -- --   153.6 ab 37.10 b   --

LSD (P=0.05)
19.9 2.6
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on 40-inch row spacing.
3Number of live cotton plants per 40 feet of row; all rows received 210 seed.
4Plant height was measured on July 30, 1997.



Table 35. Effect of Di-Terra on the yield of Sure Grow 501 cotton in a field infested with the reniform nematode. 1
Treatment Rate
per acre2		 Application
method		 Seed
cotton		 Seed
cotton		 Yield
over control

lb/plot lb/A lb/A
Di-Terra 25 lb In-furrow 13.18 ab 2,155.5 ab 523.5
Di-Terra 50 lb In-furrow 12.94 ab 2,116.3 ab 484.3
Di-Terra 75 lb In-furrow 14.10 a   2,304.7 a   672.7
Temik 15G 5 lb In-furrow 14.29 a   2,337.4 a  705.4
Di-Syston 8EC 1 lb ai In-furrow 13.13 ab 2,146.1 ab 514.1
Control -- -- 9.98 b  1,632.0 b   --

LSD (P=0.05)
4.04 660.5
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on 40-inch row spacing.



Table 36. Effect of Nemacur 3E and Admire 2F on population development of the
reniform nematode on Sure Grow 501 cotton.1
Treatment Rate
per acre3		 Application
method		 R. reniformis / 250 cm 3 soil2 Mean4
Pi Pm Pf
Control -- -- 2,871 a 3,090 a 1,288 bc 2,416 a
Nemacur 3E 1 lb In-furrow 3,090 a 5,202 a 2,871 a   3,721 a
Nemacur 3E +
Admire 2F		 1 lb +
0.025 lb		 In-furrow 2,987 a 3,245 a 2,459 ab 2,897 a
Nemacur 3E +
Admire 2F		 1 lb +
0.05 lb		 In-furrow 3,051 a 4,725 a 2,511 ab 3,429 a
Nemacur 3E +
Admire 2F		 1 lb +
0.1 lb		 In-furrow 3,257 a 4,493 a 1,352 bc 3,034 a
Admire 2F 0.2 lb In-furrow 2,768 a 5,781 a 1,597 bc 3,382 a
Temik 15G 5 lb In-furrow 2,768 a 4,172 a 1,300 bc 2,747 a
Di-Syston 8EC 1 lb In-furrow 3,657 a 5,111 a 1,017 c   3,262 a

LSD (P=0.05)
2,222 2,865 1,244 1,403
1Data are means of five replications. Means were compared using significant difference test.
2Rates were calculated based on 40-inch row spacing.
3Pi = nematodes recovered at planting on May 8, 1997; Pm = nematodes recovered on June 19, 1997; and Pf = final nematode population on October 17, 1997.
4Average reniform nematode population density across all sample dates.



Table 37. Effect of Nemacur 3E and Admire 2F on plant survival and height of Sure Grow 501 cotton in a field infested with the reniform nematode. 1
Treatment Rate
per acre2		 Application
method		 Seeding
stand3		 Plant
height4		 Plant height
over control

in in
Control -- -- 141.75 a 36.63 ab --
Nemacur 3E 1 lb In-furrow 156.75 a 38.28 ab 1.65
Nemacur 3E +
  Admire 2F		 1 lb +
0.025 lb		 In-furrow 137.75 a 39.25 a   2.62
Nemacur 3E +
  Admire 2F		 1 lb +
0.05 lb		 In-furrow 152.50 a 36.13 b -0.50  
Nemacur 3E +
  Admire 2F		 1 lb +
0.1 lb		 In-furrow 153.00 a 37.73 ab 1.10
Admire 2F 0.2 lb In-furrow 141.50 a 39.33 a   2.70
Temik 15G 5 lb In-furrow 151.50 a 38.50 ab 1.87
Di-Syston 8EC 1 lb In-furrow 138.75 a 37.58 ab 0.95

LSD (P=0.05)
36.34 3.08
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on 40-inch row spacing.
3Number of live plants per 40 feet of row; all rows received 210 seed.
4Plant height was measured on July 30, 1997.



Table 38. Effect of Nemacur 3E and Admire 2F on the yield of Sure Grow 501 cotton in a reniform nematode-infested field.1
Treatment Rate
per acre2		 Application
method		 Seed
cotton		 Seed
cotton		 Yield increase
over control

lb/plotin lb/A lb/A
Control -- -- 12.16 bc 1,988.8 bc --
Nemacur 3E 1 lb In-furrow 15.57 ab 2,546.4 ab 557.6
Nemacur 3E +
  Admire 2F		 1 lb +
0.025 lb		 In-furrow 16.61 a   2,715.2 a   726.4
Nemacur 3E +
  Admire 2F		 1 lb +
0.05 lb		 In-furrow 14.52 abc 2,374.4 abc 385.6
Nemacur 3E +
  Admire 2F		 1 lb +
0.1 lb		 In-furrow 13.69 abc 2,237.7 abc 248.9
Admire 2F 0.2 lb In-furrow 14.98 abc 2,449.0 abc 460.2
Temik 15G 5 lb In-furrow 15.91 ab   2,601.1 ab   612.3
Di-Syston 8EC 1 lb In-furrow 11.18 c    1,827.3 c     -161.5

LSD (P=0.05)
4.12 674.1
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on 40-inch row spacing.



Table 39. Effect of Metham Sodium on population development of the reniform nematode on Sure Grow 501 cotton.1
Treatment Rate
per acre2		 Application
method 		R. reniformis / 250 cm3 soil at 0-147 days after planting
0 41 73
Metham Sodium 5 gal 10-in band
ahead of planter		 1,944 a 1,494 bcd 2,794 ab
Metham Sodium 10 gal 10-in band
ahead of planter		 2,665 a 2,421 ab   3,180 a
Metham Sodium 20 gal 10-in band
ahead of planter		 2,768 a 1,597 abcd 2,202 ab
Metham Sodium 5 gal 10-in band rate
in-furrow		 2,639 a 1,429 cd   1,854 ab
Metham Sodium 7.5 gal 10-in band rate
in-furrow		 2,086 a 1,120 d 1,262 ab
Metham Sodium 10 gal 10-in band rate
in-furrow		 2,433 a 1,532 bcd 991 b
Temik 15G 5 lb In-furrow 2,163 a 2,253 abc 2,755 ab
Di-Syston 8EC 1 lb ai In-furrow 1,751 a 1,790 abcd 2,498 ab
Control -- -- 2,485 a 2,549 a 2,112 ab

LSD (P=0.05)
1,615 987 2,004
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on 40-inch row spacing.
3Average reniform nematode population density across all sample dates.


Table 39. Continued.
Table 39. Effect of Metham Sodium on population development of the reniform nematode on
Sure Grow 501 cotton. 1
Treatment Rate
per acre2		 Application
method		 R. reniformis / 250 cm 3 soil at 0-147 days after planting Mean3
112 147
Metham Sodium 5 gal 10-in band
ahead of planter		   1,957 bcd 2,511 a 2,140 ab
Metham Sodium 10 gal 10-in band
ahead of planter		     3,051 abcd 2,112 a 2,686 a
Metham Sodium 20 gal 10-in band
ahead of planter		     1,777 bcd 2,215 a 2,112 ab
Metham Sodium 5 gal 10-in band rate
in-furrow		 1,120 d 2,549 a 1,918 ab
Metham Sodium 7.5 gal 10-in band rate
in-furrow		   1,506 cd 2,498 a 1,694 b
Metham Sodium 10 gal 10-in band rate
in-furrow		    3,373 abc 2,112 a 2,088 ab
Temik 15G 5 lb In-furrow   3,566 ab 2,562 a 2,660 a
Di-Syston 8EC 1 lb ai In-furrow 4,429 a 3,051 a 2,704 a
Control -- -- 4,262 a 1,918 a 2,665 a

LSD (P=0.05)
1,949 1,159 855
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on 40-inch row spacing.
3Average reniform nematode population density across all sample dates.



Table 40. Effect of Metham Sodium on plant survival and height of Sure Grow 501 cotton in a field infested with the reniform nematode. 1
Treatment Rate
per acre2		 Application
method		 Seeding
stand3		 Plant
height4		 Plant height
over control

in in
Metham Sodium 5 gal 10-in band
ahead of planter 		139.6 a 38.12 ab 0.30
Metham Sodium 10 gal 10-in band
ahead of planter 		167.4 a 38.38 ab 0.56
Metham Sodium 20 gal 10-in band
ahead of planter		 159.2 a 37.74 ab -0.08
Metham Sodium 5 gal 10-in band rate
in-furrow		   87.6 b 35.24 b   -2.58
Metham Sodium 7.5 gal 10-in band rate
in-furrow		   84.2 b 36.88 ab -0.94
Metham Sodium 10 gal 10-in band rate
in-furrow		   53.2 b 30.06 c   -7.76
Temik 15G 5 lb In-furrow 137.6 a 40.04 a   2.22
Di-Syston 8EC 1 lb ai In-furrow 167.6 a 38.60 ab 0.78
Control -- -- 156.8 a 37.82 ab --

LSD (P=0.05)
35.3 4.73
1Data are means of five replications. Means were compared using the least significant difference test.
2Rates were calculated based on 40-inch row spacing.
3Number of live plants per 40 feet of row; all rows received 210 seed.
4Plant height was measured on July 30, 1997.

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