Table 1
County, cotton variety, soil description, planting date and sampling date for fields in Georgia sampled for Fusarium oxysporum f. sp. vasinfectum and nematodes in 2015 and 2016.
| Year | County | Field | Cotton varietya | Soil descriptionb | Planting date | Sampling date |
|---|---|---|---|---|---|---|
| 2015 | ||||||
| Ben Hill | 1 | DP 1252 | Leefield loamy sand | May 15 | August 13 | |
| Berrien | 1 | DP 1252 | Leefield loamy sand | April 24 | August 28 | |
| Cook | 1 | DP 1252 | Stilson loamy sand | May 1 | July 24 | |
| Lowndes | 1 | DP 1050 | Tifton loamy sand | May 8 | August 28 | |
| Tattnall | 1 | DP 1050 | Loamy sandy | May 20 | Mid-August | |
| 2 | DP 1050/DP 1137 | Loamy sandy | May 15 | Mid-August | ||
| Tift | 1 | DP 1252/PHY 487/DP 1454 | Stilson/Dothan loamy sand | May 4 | June 24 | |
| 2 | PHY 333 | Ocilla loamy sand | June 2 | August 28 | ||
| 3 | DP 1252 | Ocilla loamy sand | unknown | July 10 | ||
| 4 | DP 1252/DP 1555 | Dothan loamy sand | unknown | September 30 | ||
| 5 | DP 1454 | Dothan loamy sand | May 7 | June 19 | ||
| 2016 | ||||||
| Coffee | 1 | ST 6182 | Stilson loamy sandy | May 15 | August 30 | |
| Cook | 1 | DP 1252 | Leefield/Irvington loamy sand | May 5 | August 26 | |
| Colquitt | 1 | DP 1538 | Leefield loamy sand | April 20 | August 31 | |
| 2 | DP 1252 | Dothan loamy sand | 1st week of May | August 31 | ||
| 3 | DP 1553 | Ocilla loamy fine sand | Mid May | August 31 | ||
| 4 | unknown | unknown | unknown | December 1 | ||
| Tattnall | 1 | DP 1558 | Irvington loamy sand | May 13 | September 22 | |
| 2 | DP 1553/DP 1558 | Pelham loamy sand | April 27 | September 22 | ||
| 3 | DP 1553/DP 1558 | Pelham loamy sand | April 29 | September 22 | ||
| Tift | 1 | DP 1252 | Ocilla loamy sand | April 24 | August 24 | |
| 2 | DP 1252 | Dothan/Fuquay/ Tifton loamy sand | April 26 | August 24 | ||
| 3 | DP 1252 | Stilson/Dothan loamy sand | April 23 | August 24 | ||
| 4 | ST 5115/ST 6182 | Fuquay/Tifton loamy sand | June 1 | August 26 | ||
| 5 | DP 1558 | Dothan loamy sand | May 15 | August 26 | ||
| Ware | 1 | PHY 444 | Leefield loamy sand | May 18–20 | September 7 | |
| 2 | DP 1558 | Pelham loamy sand | May 16 | September 7 | ||
| Worth | 1 | DP 1558 | Fuquay loamy sand | May 7 | September 21 |
1 Notes: aCotton varieties names are abbreviated in the table; bsoil description information provided by county extension agents. Information is incomplete for some fields. Full names are as follows: DP 1252 B2RF, DP 1050 B2RF, DP 1137 B2RF, DP 1555 B2RF, DP 1454 NR B2RF, DP 1558 NR B2RF, DP 1538 B2XF, DP 1553 B2XF, PHY 487 WRF, PHY 333 WRF, PHY 444 WRF, ST 6182 GLT, and ST 5115 GLT.
Table 2
Fov races and plant-parasitic nematodes found in South Georgia fields in 2015 and 2016.
| Fov | Nematode speciesa | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| County | Race/genotype description | Meloidogyne incognita | Belonolaimus longicaudatus | Criconemella spp. | Pratylenchus brachyurus | Helicotylenchus spp. | Hoplolaimus columbus | Rotylenchulus reniformis | ||||||||
| 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | 2015 | 2016 | |
| Ben Hill | 1 | ns2 | Y3 | ns | Y | ns | Y | ns | Y | ns | N | ns | N | ns | N | ns |
| Berrien | 1 | ns | Y | ns | Y | ns | Y | ns | Y | ns | Y | ns | N | ns | N | ns |
| Coffee | ns | 1, 2, LA110 | ns | Y | ns | N | ns | Y | ns | Y | ns | N | ns | N | ns | N |
| Cook | 1, LA108, LA110 | 1, LA110 | N | N | Y | Y | N | Y | Y | Y | N | Y | N | N | N | N |
| Colquitt | ns | 1, LA110, MDS–12, LA108 | ns | Y | ns | Y | ns | Y | ns | Y | ns | Y | ns | N | ns | Y |
| Lowndes | 1, 2, 8, LA108, LA110 | ns | N | ns | Y | ns | Y | ns | Y | ns | Y | ns | N | ns | N | ns |
| Tattnall | 1 | 1, LA110 | N | N | Y | Y | Y | Y | N | Y | Y | Y | Y | Y | N | N |
| Tift | 1,8, LA110, LA108 | 1,8, LA108, LA110, LA127/140 | Y | Y | Y | Y | Y | Y | Y | Y | Y | N | N | N | N | N |
| Ware | ns | 1, 8 | ns | Y | ns | N | ns | Y | ns | Y | ns | N | ns | N | ns | N |
| Worth | ns | 1, LA110 | ns | Y | ns | Y | ns | Y | ns | Y | ns | N | ns | N | ns | N |
Fig. 1
Map showing the location of the counties in Georgia that were sampled, and identification of which Fov races and genotypes were found in each county. Races and genotypes are distinguished by color.
Table 3
Total number of samples infected with Fov collected from Georgia counties and the respective occurrence of M. incognita, B. longicaudatus, and Pratylenchus brachyurus in all combinations together or separately in the individual samples.
| Samples with concomitant occurrence of nematodes | ||||||
|---|---|---|---|---|---|---|
| County | Total samples | Meloidogyne incognita | Belonolaimus longicaudatus | Pratylenchus brachyurus | All three | |
| Ben Hill | 10 | M. incognita | 1 | 0 | ||
| B. longicaudatus | 0 | 6 | ||||
| P. brachyurus | 0 | 1 | 0 | |||
| Berrien | 10 | M. incognita | 0 | 0 | ||
| B. longicaudatus | 0 | 6 | ||||
| P. brachyurus | 0 | 1 | 4 | |||
| Coffee | 8 | M. incognita | 4 | 0 | ||
| B. longicaudatus | 0 | 0 | ||||
| P. brachyurus | 4 | 0 | 0 | |||
| Cook | 23 | M. incognita | 0 | 0 | ||
| B. longicaudatus | 0 | 3 | ||||
| P. brachyurus | 0 | 11 | 5 | |||
| Colquitt | 40 | M. incognita | 9 | 0 | ||
| B. longicaudatus | 0 | 1 | ||||
| P. brachyurus | 16 | 8 | 2 | |||
| Lowndes | 10 | M. incognita | 0 | 0 | ||
| B. longicaudatus | 0 | 6 | ||||
| P. brachyurus | 0 | 4 | 0 | |||
| Tattnall | 50 | M. incognita | 0 | 0 | ||
| B. longicaudatus | 0 | 32 | ||||
| P. brachyurus | 0 | 6 | 0 | |||
| Tift | 108 | M. incognita | 5 | 11 | ||
| B. longicaudatus | 6 | 28 | ||||
| P. brachyurus | 4 | 9 | 8 | |||
| Ware | 20 | M. incognita | 0 | 0 | ||
| B. longicaudatus | 0 | 13 | ||||
| P. brachyurus | 0 | 7 | 0 | |||
| Worth | 10 | M. incognita | 0 | 0 | ||
| B. longicaudatus | 1 | 3 | ||||
| P. brachyurus | 0 | 4 | 2 | |||