Table 3. Effect of ten PGPR strains on soybean plant height and plant biomass in greenhouse trials at 60 DAPa.
| Treatment | Scientific Name | PHb | 60 DAP | Biod | 60 DAP | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dunnett's P vs. (P ≤ 0.05) | Dunnett's P vs. (P ≤ 0.05) | ||||||||||
| Clothianidin | P. nishizawae | Abamectin | Water | Clothianidin | P. nishizawae | Abamectin | Water | ||||
| + B. firmusc | + B. firmus | ||||||||||
| Bal11 | B. altitudinis | 35.3 | 0.0164 | 1.0000 | 0.9971 | 1.0000 | 4.9 | 0.1865 | 0.9910 | 0.9971 | 0.9845 |
| Bal13 | B. altitudinis | 35.1 | 0.0154 | 1.0000 | 0.9962 | 1.0000 | 5.4 | 0.0116 | 1.0000 | 1.0000 | 1.0000 |
| Bmo3 | B. mojavensis | 40.8 | 0.0002 | 0.6444 | 0.3767 | 0.9827 | 4.6 | 0.1871 | 0.9909 | 0.9970 | 0.9842 |
| Bsa26 | B. safensis | 38.9 | 0.0014 | 0.9352 | 0.6983 | 1.0000 | 4.8 | 0.0566 | 1.0000 | 1.0000 | 1.0000 |
| Bsa27 | B. safensis | 35.4 | 0.0109 | 1.0000 | 0.9870 | 1.0000 | 4.8 | 0.0766 | 1.0000 | 1.0000 | 1.0000 |
| Bsssu2 | B. subtilis subsp. subtilis | 41.4 | 0.0002 | 0.4976 | 0.2746 | 0.9227 | 5.4 | 0.0319 | 1.0000 | 1.0000 | 1.0000 |
| Bsssu3 | B. subtilis subsp. subtilis | 34.9 | 0.0255 | 1.0000 | 0.9997 | 0.9999 | 5.2 | 0.0399 | 1.0000 | 1.0000 | 1.0000 |
| Bve2 | B. velezensis | 34.7 | 0.0279 | 1.0000 | 0.9998 | 0.9998 | 5.3 | 0.0771 | 1.0000 | 1.0000 | 1.0000 |
| Bve12 | B. velezensis | 37.9 | 0.0020 | 0.9654 | 0.7667 | 1.0000 | 6.1 | 0.0028 | 0.9972 | 0.9921 | 0.9986 |
| Fso1 | Fictibacillus solisalsi | 35.0 | 0.0187 | 1.0000 | 0.9984 | 1.0000 | 4.3 | 0.1577 | 0.9963 | 0.9990 | 0.9930 |
| Control | Active ingredientc | ||||||||||
| Poncho/Votivo | Clothianidin | 27.1 | … | 0.0477 | 0.1414 | 0.0058 | 2.8 | … | 0.0319 | 0.0495 | 0.0227 |
| +B. firmus I-1582 | |||||||||||
| Clariva | Pasteuria nishizawae | 34.2 | 0.0477 | … | 1.0000 | 0.9990 | 5.0 | 0.0319 | … | 1.0000 | 1.0000 |
| Avicta | Abamectin | 33.7 | 0.1481 | 1.0000 | … | 0.9546 | 5.2 | 0.0517 | 1.0000 | … | 1.0000 |
| Untreated control | Water | 37.6 | 0.0056 | 0.9988 | 0.9385 | … | 5.3 | 0.0220 | 1.0000 | 1.0000 | … |
Greenhouse trials were performed in plastic cone-tainers with mixed pasteurized soil and sand (60:40 v/v) for 60 days. Data collected were repeated twice and analyzed in SAS 9.4 using PROC GLIMMIX procedure at significant level of 0.05. Adjusted P values less than 0.05 indicated a significant effect. Adjusted P values were obtained by analyzing data according to Dunnett’s method.
aThe LS-means are presented in the tables with adjusted P values for statistical differences.
bPH = plant height (cm) at 60 DAP.
cActive ingredients for the nematicides Poncho/Votivo are Clothianidin plus B. firmus I-1582, Clariva is Pasteuria nishizawae, Avicta is Abamectin, and untreated control is water.
dBio = soybean plant biomass including shoot fresh weight (g) and root fresh weight (g) at 60 DAP.