Number of soybean cyst nematode (SCN) females per gram of root dry weight, 30 days after planting, for PI 88788 seed (variety P37A27X) treated with different seed treatments, by SCN phenotype_
| Treatment | HG type 0 | HG type 2.5.7 | HG type 1.2.5.7 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Females per gram roota | SE | Group | Females per gram root | SE | Group | Females per gram root | SE | Group | |
| Untreated | 33.7 | 5.6 | A | 486.1 | 91.4 | A | 508.8 | 103.5 | A |
| Base | 34.3 | 5.6 | A | 440.0 | 83.2 | A | 487.9 | 101.0 | A |
| Base + Aveo EZ | 43.7 | 6.9 | A | 451.1 | 86.5 | A | 394.6 | 80.8 | AB |
| Base + Bio ST | 37.4 | 6.0 | A | 401.5 | 76.3 | A | 467.9 | 95.5 | A |
| Base + Clariva PN | 31.1 | 5.1 | A | 442.9 | 84.7 | A | 441.5 | 89.9 | A |
| Base + ILEVO | 12.3 | 2.2 | B | 243.0 | 46.6 | B | 274.5 | 57.1 | B |
| Base + Saltro | 39.7 | 6.2 | A | 400.9 | 75.1 | A | 454.7 | 92.3 | A |
| Base + Trunemco | 42.2 | 6.9 | A | 393.9 | 75.3 | A | 394.4 | 80.6 | AB |
| Main effect | F-value = 6.6, p < .0001 | F-value = 3.9, p = .0005 | F-value = 4.8, p < .0001 | ||||||
Soybean cultivar P37A27X (PI 88788) and seed treatments used in greenhouse experiments conducted in 2020 and 2021, including active ingredients, application rates, and manufacturers_
| Treatment | Active ingredient(s) | Rate | Company |
|---|---|---|---|
| Untreated | N/A | N/A | N/A |
| Base | metalaxyl, pyraclostrobin, fluxapyroxad, clothianidin | See footnotea | See footnoteb |
| Base + Aveo EZ | Bacillus amyloliquefaciens PTA-4838 | 2 ml/100,000 seeds | Valent U.S.A. (San Ramon, CA) |
| Base + Bio ST | heat-killed Burkholderia rinojensis + fermentation media | 195 ml/100 kg | Albaugh, LLC (Ankeny, IA) |
| Base + Clariva PN | Pasteuria nishizawae | 130 ml/100 kg | Syngenta (Greensboro, NC) |
| Base + ILEVO | fluopyram | 0.15 mg a.i. / seed | BASF (Research Triangle Park, NC) |
| Base + Saltro | pydiflumetofen | 0.075 mg a.i. / seed | Syngenta (Greensboro, NC) |
| Base + Trunemco | Cis-jasmone, Bacillus amyloliquefaciens | 20.2 ml / 100 kg | Nufarm (Alsip, IL) |
Number of soybean cyst nematode (SCN) females per root, 30 days after planting, for PI 88788 seed (variety P37A27X) treated with different seed treatments, by SCN phenotype_
| Treatment | HG type 0 | HG type 2.5.7 | HG type 1.2.5.7 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Females per roota | SE | Group | Females per root | SE | Group | Females per root | SE | Group | |
| Untreated | 9.0 | 1.7 | A | 106.9 | 11.7 | A | 119.2 | 8.8 | A |
| Base | 9.5 | 1.8 | A | 103.4 | 11.5 | A | 101.1 | 8.2 | A |
| Base + Aveo EZ | 11.7 | 2.1 | A | 90.7 | 10.4 | A | 90.6 | 7.0 | A |
| Base + Bio ST | 10.1 | 1.9 | A | 88.0 | 9.9 | A | 107.1 | 8.1 | A |
| Base + Clariva PN | 8.7 | 1.7 | A | 96.5 | 11.0 | A | 99.5 | 7.4 | A |
| Base + ILEVO | 2.6 | 0.6 | B | 34.8 | 4.1 | B | 41.5 | 3.6 | B |
| Base + Saltro | 9.9 | 1.8 | A | 91.4 | 9.9 | A | 94.9 | 6.9 | A |
| Base + Trunemco | 10.9 | 2.0 | A | 97.5 | 11.2 | A | 94.2 | 7.1 | A |
| Main effect | F-value = 6.5, p <.0001 | F-value = 11.9, p <.0001 | F-value = 14.7, p <.0001 | ||||||
SCN populations and virulence phenotypes (HG types)_
| Soybean lines | HG Type 0 | HG Type 2.5.7 | HG Type 1.2.5.7 |
|---|---|---|---|
| Female Index (%)a | |||
| 1. PI 548402 (Peking) | 2.4 | 0.6 | 18.4 |
| 2. PI 88788 | 5.8 | 86.1 | 92.7 |
| 3. PI 90763 | 0.7 | 0.0 | 0.2 |
| 4. PI 209332 | 0.0 | 0.0 | 0.0 |
| 5. PI 209332 | 3.1 | 80.6 | 72.0 |
| 6. PI 89772 | 0.8 | 0.0 | 0.2 |
| 7. PI 548316 (Cloud) | 9.5 | 76.0 | 74.0 |
Soybean root dry weight, 30 days after planting, across all SCN phenotypes for PI 88788 seed (variety P37A27X), treated with different seed treatments_
| Treatment | Root dry weight (g)a | SE | Group |
|---|---|---|---|
| Untreated | 0.24 | 0.03 | A |
| Base | 0.24 | 0.03 | A |
| Base + Aveo EZ | 0.24 | 0.03 | A |
| Base + Bio ST | 0.25 | 0.03 | A |
| Base + Clariva PN | 0.24 | 0.03 | A |
| Base + ILEVO | 0.17 | 0.03 | B |
| Base + Saltro | 0.23 | 0.03 | A |
| Base + Trunemco | 0.25 | 0.03 | A |
| Main effect | F-value = 14.3, p < .0001 | ||