Table 3.
Effects of irrigation, crop phase, and nematicide application on Rotylenchulus reniformis in 2017 and 2018.
| Total Rotylenchulus reniformis population density | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | 2018 | |||||||||||||||
| Pia | Pm | Pf | Rf | Pi | Pm | Pf | Rf | |||||||||
| ANOVA (p-values) | ||||||||||||||||
| Irrigation (I) | 0.76 | 0.75 | 0.61 | 0.61 | 0.27 | 0.49 | 0.25 | 0.21 | ||||||||
| Crop phase (C) | < 0.01** | < 0.01** | < 0.01** | 0.02* | < 0.01** | < 0.01** | < 0.01** | < 0.01** | ||||||||
| I × C | 0.35 | 0.46 | 0.02* | 0.79 | 0.05* | 0.82 | 0.39 | 0.16 | ||||||||
| Nematicide (N) | 0.96 | 0.47 | 0.13 | 0.78 | 0.01** | 0.22 | 0.13 | 0.78 | ||||||||
| I × N | 0.89 | 0.70 | 0.22 | 0.62 | 0.10 | 0.72 | 0.53 | 0.16 | ||||||||
| C × N | 0.18 | 0.75 | 0.84 | 0.50 | 0.29 | 0.90 | 0.74 | 0.41 | ||||||||
| I × C × N | 0.67 | 0.80 | 0.65 | 0.90 | 0.18 | 0.84 | 0.53 | 0.34 | ||||||||
| Ratio of Rotylenchulus reniformis immature females and juveniles: males | ||||||||||||||||
| 2017 | 2018 | |||||||||||||||
| Pia | Pm | Pf | Pi | Pm | Pf | |||||||||||
| ANOVA (p-values) | ||||||||||||||||
| Irrigation (I) | 0.11 | 0.34 | 0.15 | 0.11 | 0.46 | 0.19 | ||||||||||
| Crop phase (C) | 0.05* | 0.18 | 0.01** | 0.02* | 0.28 | 0.03* | ||||||||||
| I × C | 0.93 | 0.38 | 0.92 | 0.10 | 0.36 | 0.43 | ||||||||||
| Nematicide (N) | 0.95 | 0.61 | < 0.01** | 0.40 | 0.56 | 0.75 | ||||||||||
| I × N | 0.18 | 0.84 | 0.08 | 0.37 | 0.43 | 0.95 | ||||||||||
| C × N | 0.87 | 0.50 | 0.02* | 0.72 | 0.64 | 0.83 | ||||||||||
| I × C × N | 0.97 | 0.37 | 0.06 | 0.43 | 0.73 | 0.94 | ||||||||||
Notes: aPi, Pm, and Pf are p-values for mean nematode population densities (per 100 cm3 soil) prior to planting, at midseason (52 and 56 days after planting in 2017 and 2018), and at harvest (150 and 151 days after planting in 2017 and 2018), respectively. Rf is reproduction factor (Pf/Pi).
* and ** represent significant effects at p ≤ 0.05 and p ≤ 0.01, respectively.