High Plains Verticillium Wilt Trial Results from 2017

Transcription

1 High Plains Verticillium Wilt Trial Results from 2017 Dr. Terry A. Wheeler Research Plant Pathologist, Texas A&M AgriLife Research Dr. Jason E. Woodward, Extension Plant Pathologist Texas A&M AgriLife Extension Service The information given herein is for educational purposes only. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement by the Texas A&M AgriLife Extension Service, Texas A&M AgriLife Research Experiment Station and the Texas A&M System is implied.

2 Table 1. Results from the Floydada Verticillium wilt trial (high disease pressure) Variety 1 Yield x ($/a) Lint yield (lbs/acre) ( /lb) Plants/ Ft row Wilt Defoliation Turnout FM 2334GLT 770 1, FM 2322GL 750 1, FM 1830GLT 739 1, CG 3226B2XF 720 1, FM 2484B2F 701 1, ST 4747GLB , PHY 243WRF 692 1, NG 3640XF 672 1, FM 1911GLT 662 1, NG 3500XF 648 1, PX 2AX2W3FE 637 1, FM 2007GLT 623 1, PX2A28W3FE 585 1, NG 4792XF 575 1, PHY 230W3FE 569 1, PHY 223WRF 565 1, AMX1725B3XF 556 1, PHY 220W3FE 553 1, PX3A82W3FE 530 1, NG 3517B2XF 524 1, AMX1718B3XF 511 1, PHY 300W3FE 493 1, NG 4545B2XF 492 1, PHY 312WRF 490 1, NG 3699B2XF FM 1900GLT 467 1, WU17ZC PHY 333WRF DP 1614B2XF DP 1522B2XF DP 1518B2XF NG 3406B2XF CG 3475B2XF PHY 340W3FE MSD (0.05) AMX = experimental line from Americot; CG = Croplan Genetics; DP = Deltapine; FM = Fibermax; NG = NexGen; PHY = Phytogen; PX = experimental line from Phytogen; ST = Stoneville; WU = Winfield United experimental line.

3 Table 2. Fiber quality from the Floydada Verticillium wilt trial (high disease pressure) Variety 1 Mic 3 Strength Length Elon 3 Unif 3 Rd +b Leaf AMX1718B3XF AMX1725B3XF CG 3226B2XF CG 3475B2XF DP 1518B2XF DP 1522B2XF DP 1614B2XF FM 1830GLT FM 1900GLT FM 1911GLT FM 2007GLT FM 2322GL FM 2334GLT FM 2484B2F NG 3406B2XF NG 3500XF NG 3517B2XF NG 3640XF NG 3699B2XF NG 4545B2XF NG 4792XF PHY 220W3FE PHY 223WRF PHY 243WRF PHY 300W3FE PHY 312WRF PHY 333WRF PHY 340W3FE PHY 230W3FE PX2A28W3FE PX2AX2W3FE PX3A82W3FE ST 4747GLB WU17ZC MSD (0.05) AMX = experimental line from Americot; CG = Croplan Genetics; DP = Deltapine; FM = Fibermax; NG = NexGen; PHY = Phytogen; PX = experimental line from Phytogen; ST = Stoneville; WU = Winfield United experimental line. 3 Mic=micronaire; Unif = Uniformity; Elon = Elongation.

4 Table 3. Results from the Plainview Verticillium wilt trial (moderate disease pressure) Variety 1 Yield x ($/a) Lint yield (lbs/acre) ( /lb) Plants/ Ft row Wilt Defoliation Turnout NG 3640XF 652 1, AMX5140XF 645 1, PX2AX4W3FE 616 1, NG 3517B2XF 603 1, FM 2322GL 595 1, CG 3226B2XF 588 1, NG 3780B2XF 588 1, FM 1320GL 583 1, FM 1888GL 572 1, FM 1911GLT 570 1, PHY 312WRF 567 1, PX2AX3W3FE 560 1, FM 2484B2F 553 1, NG 3406B2XF 537 1, AMX1720B3XF 528 1, DP 1612B2XF 523 1, PHY 223WRF 518 1, PHY 300W3FE 510 1, PHY 333WRF 499 1, PX2A28W3FE 498 1, CG 3475B2XF 493 1, NG 3699B2XF 491 1, PX3A99W3FE 490 1, FM 1953GLTP 468 1, PHY 220W3FE 458 1, PHY 243WRF 455 1, PX2A36W3FE 447 1, WU17XL , DP 1614B2XF DP 1518B2XF 429 1, PHY 230W3FE PHY 308WRF FM 1830GLT NG 3500XF PHY 330W3FE PX2A31W3FE MSD (0.05) AMX = experimental line from Americot; CG = Croplan Genetics; DP = Deltapine; FM = Fibermax; NG = NexGen; PHY = Phytogen; PX = experimental line from Phytogen; ST = Stoneville; WU = Winfield United experimental line. 3 The north half of the test had lower yields than the south half. Regression analysis was used to adjust yields in the north half. These four cultivars had all plots in the north half and no estimate of yield loss could be obtained. NG 3500XF had the highest yields of any variety within the poorer yielding half of the field.

5 Table 4. Fiber quality from the Plainview Verticillium wilt trial (moderate disease pressure) Variety 1 Mic 3 Strength Length Elon 3 Unif 3 Rd +b Leaf AMX1720B3XF AMX5140XF CG 3226B2XF CG 3475B2XF DP 1518B2XF DP 1612B2XF DP 1614B2XF FM 1320GL FM 1830GLT FM 1888GL FM 1911GLT FM 1953GLTP FM 2322GL FM 2484B2F NG 3406B2XF NG 3500XF NG 3517B2XF NG 3640XF NG 3699B2XF NG 3780B2XF PHY 220W3FE PHY 223WRF PHY 243WRF PHY 300W3FE PHY 308WRF PHY 312WRF PHY 330W3FE PHY 333WRF PHY 230W3FE PX2A28W3FE PX2A31W3FE PX2A36W3FE PX2AX3W3FE PX2AX4W3FE PX3A99W3FE WU 17XL MSD (0.05) AMX = experimental line from Americot; CG = Croplan Genetics; DP = Deltapine; FM = Fibermax; NG = NexGen; PHY = Phytogen; PX = experimental line from Phytogen; ST = Stoneville; WU = Winfield United experimental line. 3 Mic=micronaire; Unif = Uniformity; Elon = Elongation.

6 The Plainview location had substantial damage due to Verticillium wilt in At harvest time, it was apparent that the south eight rows of the trial yielded much higher than the north eight rows (average of 354 lbs of lint/acre difference between the two sets of eight rows). Disease ratings (wilt incidence and defoliation) were not affected by whatever caused the yield differences. There was no obvious cause for this difference. There were no symptoms of herbicide drift that might have affected certain transgenic traits. The Bayer CropScience varieties with Liberty-Link traits did appear to have a relatively normal relationship between disease and yield loss (Fig. 1). Dicamba resistant varieties (Americot, Deltapine, and Croplan Genetics) had a poorer though significant relationship between disease and yield (Fig. 1). Varieties with the Enlist trait and Roundup Ready Flex alone (Phytogen cultivars, and FM 2484B2F) had no relationship between disease ratings and yield (Fig. 1). Figure 1. Relationship between % defoliation and lint yield for the Verticillium wilt variety trial at Plainview. Bayer CropScience varieties with the Liberty-Link train (LL) had a negative correlation between disease and yield (R 2 =0.36); cultivars with the Dicamba trait also had a negative correlation between disease and yield (R 2 =0.11). There was no correlation between disease and yield for Phytogen varieties (both with Enlist trait or just with glyphosate resistance [RF]) or FM 2484B2F (RF). Regression analysis involving yield with different varieties is not expected to have a high correlation between disease and yield, but typically with these types of Verticillium wilt trials, the R 2 value is between 0.20 and 0.50 (meaning the amount of disease explains between 20 and 50% of the variation in yield). The nonrelationship between disease and yield would indicate some other factor affected this trial besides disease, but it had a smaller effect on Liberty-Link and Dicamba resistant varieties than on Roundup Ready Flex only varieties or Enlist resistant varieties. So, disease ratings with this trial are useful for evaluating cultivars, yields may or may not be accurate indicators of a varieties potential in a Verticillium wilt field.

7 Table 5. Results from the Seminole Verticillium wilt trial (low disease pressure) Variety 1 Yield x ($/a) Lint yield (lbs/acre) ( /lb) Plants/ Ft row Wilt Defoliation Turnout FM 2334GLT 1,490 2, DP 1558NRB2RF 1,482 2, PHY 340W3FE 1,440 2, FM 1830GLT 1,392 2, NG 5711B3XF 1,362 2, ST 5115GLT 1,323 2, FM 1888GL 1,303 2, CG 3527B2XF 1,303 2, NG 3500XF 1,298 2, PHY 450W3FE 1,290 2, NG 4792XF 1,281 2, PHY 333WRF 1,272 2, NG 4601B2XF 1,265 2, ST 6182GLT 1,259 2, FM 2484B2F 1,242 2, PHY 430W3FE 1,239 2, NG 3406B2XF 1,231 2, NG 4545B2XF 1,227 2, NG 3780B2XF 1,222 2, WU 17ZC8 1,220 2, FM 1911GLT 1,211 2, NG 3699B2XF 1,206 2, NG 4689B2XF 1,204 2, CG 3885B2XF 1,199 2, PHY 444WRF 1,195 2, DP 1646B2XF 1,192 2, NG 3522B2XF 1,190 2, NG 1717B2XF 1,179 2, DP 1522B2XF 1,173 2, DP 1639B2XF 1,162 2, PHY 308WRF 1,157 2, PX3A96W3FE 1,147 2, PHY 330W3FE 1,127 2, NG 4777B2XF 1,108 2, PHY 480W3FE 1,098 2, PHY 250W3FE 1,096 2, DP 1549B2XF 1,087 2, PHY 490W3FE 1,082 2, AMX1725B3XF 1,044 1, DP 1553B2XF 1,028 1, MSD (0.05) ns AMX = experimental line from Americot; CG = Croplan Genetics; DP = Deltapine; FM = Fibermax; NG = NexGen; PHY = Phytogen; PX = experimental line from Phytogen; ST = Stoneville; WU = Winfield United experimental line.

8 Table 6. Fiber quality from the Seminole Verticillium wilt trial (low disease pressure) Variety 1 Mic 4 Length Unif Strength Elon Rd +b Leaf AMX 1725B3XF CG 3527B2XF CG 3885B2XF DP 1522B2XF DP 1549B2XF DP 1553B2XF DP 1558NRB2RF DP 1639B2XF DP 1646B2XF FM 1830GLT FM 1888GL FM 1911GLT FM 2334GLT FM 2484B2F NG 1717B2XF NG 3406B2XF NG 3500XF NG 3522B2XF NG 3699B2XF NG 3780B2XF NG 4545B2XF NG 4601B2XF NG 4689B2XF NG 4777B2XF AMX 4792XF NG 5711B3XF PHY 250W3FE PHY 308WRF PHY 330W3FE PHY 333WRF PHY 340W3FE PHY 444WRF PHY 450W3FE PHY 480W3FE PHY 490W3FE PX 3A96W3FE PX 4A57W3FE ST 5115GLT ST 6182GLT WU 17ZC MSD (0.05) AMX = experimental line from Americot; CG = Croplan Genetics; DP = Deltapine; FM = Fibermax; NG = NexGen; PHY = Phytogen; PX = experimental line from Phytogen; ST = Stoneville; WU = Winfield United experimental line. 3 Mic=micronaire; Unif = Uniformity; Elon = Elongation.