Nematicide active ingredients, application rates, application methods, and application timing for the sweetpotatoes field experiments conducted at LSU AgCenter Northeast Research Station in 2021 and 2022_ DBP refers to days before planting_
| Product | Active Ingredient | Product Application Rate | Application Rate (a.i.) | Application Method | Application Timing |
|---|---|---|---|---|---|
| Telone II | 1,3-dichloropropene | 74.8 L/ha | 84.9 kg/ha | Shank | 21 DBP |
| Velum | Fluopyram | 500 ml/ha | 238 g/ha | In-furrow | 2 DBP |
| Vydate | Oxamyl | 18.7 L/ha | 4.28 kg/ha | In-furrow | 2 DBP |
| Salibro | Fluazaindolizine | 2.24 L/ha | 1.12 kg/ha | In-furrow | 2 DBP |
| AgLogic | Aldicarb | 16.8 kg/ha | 2.52 kg/ha | In-furrow | 2 DBP |
| Majestene | Bacterial metabolites | 18.7 L/ha | - | In-furrow | 2 DBP |
| Nimitz | Fluensulfone | 8.18 L/ha | 3.92 kg/ha | In-furrow | 2 DBP |
Effect of soil treatment and experimental repetition on the final abundance of reniform nematode (Rotylenchulus reniformis) in soil and storage root weight of sweetpotato planted into potted field soil from the LSU AgCenter Macon Ridge Research Station_ Soil treatments sharing the same letter within a column do not differ significantly (P > 0_05), according to Tukey's HSD test_
| Factor | Level | Rotylenchulus reniformis per 500 ml soil | Storage Root Weight (g) | |
|---|---|---|---|---|
| Soil Treatment | Untreated | 13,790 | a | 29.8 |
| Pasteurized | 2,155 | c | 32.1 | |
| Fluopyram | 10,560 | ab | 21.8 | |
| Oxamyl | 8,340 | ab | 30.5 | |
| Fluazaindolizine | 10,295 | ab | 36.0 | |
| Aldicarb | 6,575 | b | 31.1 | |
| Majestene | 11,055 | ab | 30.7 | |
| Fluensulfone | 6,890 | b | 28.4 | |
| Experiment | 1 | 9,435 | 32.0 | |
| 2 | 8,025 | 28.0 | ||
| P-value | Soil Treatment | 0.045 | 0.530 | |
| Experiment | 0.136 | 0.188 | ||
| Interaction | 0.749 | 0.701 | ||
2021 effect of soil treatment on the yield of US#1, canner, and jumbo grade sweetpotato harvest at the LSU AgCenter Northeast Research Station_ Soil treatments sharing the same letter within a column do not differ significantly (P > 0_05), according to Tukey's HSD test_
| Soil Treatment | Yield (Mg/ha) | ||||
|---|---|---|---|---|---|
| U.S.#1 | Canner | Jumbo | Total Marketable Yield | ||
| Control | 6.8 | ab | 7.4 | 0.1 | 14.2 |
| 1,3-dichloropropene | 9.2 | a | 6.5 | 1.0 | 16.7 |
| Fluopyram | 8.9 | ab | 9.1 | 0.4 | 18.4 |
| Oxamyl | 5.5 | b | 7.9 | 0.8 | 14.3 |
| Fluazaindolizine | 6.2 | ab | 8.3 | 0.5 | 15.0 |
| Aldicarb | 5.5 | b | 8.0 | 1.9 | 15.4 |
| Majestene | 9.6 | a | 8.1 | 0.3 | 18.0 |
| Fluensulfone | 7.0 | ab | 8.4 | 0.6 | 15.9 |
| P-value | 0.017 | 0.892 | 0.493 | 0.425 | |
Effect of soil treatment and experimental repetition on the final abundanceof reniform nematode (Rotylenchulus reniformis) in soil and storage root weight of sweetpotato planted into potted field soil from the LSU AgCenter Northeast Research Station_ Soil treatments sharing the same letter within a column do not differ significantly (P > 0_05), according to Tukey's HSD test_
| Factor | Level | Rotylenchulus reniformis per 500 ml soil | Storage Root Weight (g) | ||
|---|---|---|---|---|---|
| Soil Treatment | Untreated | 31,060 | a | 15.5 | b |
| Pasteurized | 3,515 | c | 19.0 | ab | |
| Fluopyram | 15,790 | b | 18.7 | b | |
| Oxamyl | 29,350 | ab | 17.6 | b | |
| Fluazaindolizine | 15,540 | b | 18.1 | b | |
| Aldicarb | 36,890 | a | 22.2 | ab | |
| Majestene | 29,110 | ab | 30.6 | a | |
| Fluensulfone | 29,400 | ab | 16.7 | a | |
| Experiment | 1 | 18825 | b | 25.1 | a |
| 2 | 35465 | a | 14.5 | b | |
| P-value | Soil Treatment | <0.001 | 0.005 | ||
| Experiment | <0.001 | <0.001 | |||
| Interaction | 0.122 | 0.073 | |||
2022 effect of soil treatment on the yield of US#1, canner, and jumbo grade sweetpotato harvest at the LSU AgCenter Northeast Research Station_ Soil treatments sharing the same letter within a column do not differ significantly (P > 0_05), according to Tukey's HSD test_
| Soil Treatment | Yield (Mg/ha) | ||||
|---|---|---|---|---|---|
| U.S.#1 | Canner | Jumbo | Total Marketable Yield | ||
| Control | 7.4 | b | 3.4 | 1.8 | 12.6 |
| 1,3-dichloropropene | 9.7 | ab | 4.4 | 3.0 | 17.1 |
| Fluopyram | 9.0 | ab | 3.7 | 1.0 | 13.6 |
| Oxamyl | 12.0 | a | 2.8 | 0.7 | 15.5 |
| Fluazaindolizine | 9.4 | ab | 3.6 | 3.5 | 16.5 |
| Aldicarb | 11.1 | a | 3.7 | 1.7 | 16.5 |
| Majestene | 9.2 | ab | 3.6 | 2.3 | 15.1 |
| Fluensulfone | 5.3 | b | 3.3 | 2.3 | 10.9 |
| P-value | 0.017 | 0.908 | 0.396 | 0.498 | |
2021 effect of soil treatment on the abundance of reniform nematode (Rotylenchulus reniformis) in soil planted with sweetpotato at the LSU AgCenter Northeast Research Station in 2021_ Soil treatments sharing the same letter within a column do not differ significantly (P > 0_05), according to Tukey's HSD test_
| Soil Treatment | Rotylenchulus reniformis per 500 ml soil | ||||||
|---|---|---|---|---|---|---|---|
| Pre-Fum | At Plant | Mid-Season | Harvest | ||||
| Control | 4,125 | 1,188 | a | 5,575 | a | 5,875 | a |
| 1,3-dichloropropene | 3,000 | 188 | b | 350 | b | 1,963 | b |
| Fluopyram | 4,625 | 1,750 | a | 1,825 | b | 2,575 | b |
| Oxamyl | 1,000 | 1,438 | a | 888 | b | 3,148 | ab |
| Fluazaindolizine | 4,625 | 1,500 | a | 3,170 | ab | 3,395 | ab |
| Aldicarb | 5,500 | 1,063 | a | 1,950 | b | 2,200 | b |
| Majestene | 1,625 | 1,250 | a | 2,468 | ab | 2,968 | ab |
| Fluensulfone | 3,500 | 1,625 | a | 3,188 | ab | 3,438 | ab |
| P-value | 0.193 | 0.014 | <0.001 | 0.004 | |||
2022 effect of soil treatment on the abundance of reniform nematode (Rotylenchulus reniformis) in soil planted with sweetpotato at the LSU AgCenter Northeast Research Station in 2022_ Soil treatments sharing the same letter within a column do not differ significantly (P > 0_05), according to Tukey's HSD test_
| Soil Treatment | Rotylenchulus reniformis per 500 ml soil | |||||
|---|---|---|---|---|---|---|
| Pre-Fum | At Plant | Mid-Season | Harvest | |||
| Control | 1,425 | 1,500 | a | 3,000 | ab | 5,300 |
| 1,3-dichloropropene | 1,000 | 300 | b | 1,175 | b | 3,015 |
| Fluopyram | 1,650 | 1,250 | a | 1,500 | ab | 3,800 |
| Oxamyl | 1,275 | 1,425 | a | 2,600 | ab | 4,775 |
| Fluazaindolizine | 975 | 925 | ab | 3,150 | ab | 4,050 |
| Aldicarb | 1,675 | 1,275 | a | 1,525 | ab | 2,375 |
| Majestene | 1,400 | 1,125 | a | 3,500 | a | 4,325 |
| Fluensulfone | 1,150 | 975 | ab | 2,025 | ab | 4,400 |
| P-value | 0.432 | 0.029 | 0.008 | 0.529 | ||