Table 4.

Effects of irrigation, crop phase, and nematicide application on Mesocriconema ornatum and Helicotylenchus dihystera in 2017 and 2018.

Mesocriconema ornatum population density
	2017							2018
	Pia	Pm	Pf	Rf	Pi	Pm	Pf	Rf
ANOVA (p values)
Irrigation (I)	0.14	0.19	0.29	0.96	< 0.01**	0.43	0.97	0.76
Crop phase (C)	< 0.01**	0.02*	< 0.01**	0.21	< 0.01**	0.05*	0.76	0.03*
I × C	0.04*	0.72	0.30	0.32	0.58	0.84	0.88	0.76
Nematicide (N)	0.71	0.66	0.53	0.81	0.31	0.22	0.30	0.13
I × N	0.68	0.42	0.15	0.98	0.78	0.10	0.27	0.74
C × N	0.97	0.54	0.52	0.55	0.15	0.42	0.97	0.13
I × C × N	0.34	0.87	0.63	0.42	0.99	0.25	0.55	0.76
Helicotylenchus dihystera population density
	2017							2018
	Pia	Pm	Pf	Rf	Pi	Pm	Pf	Rf
ANOVA (p values)
Irrigation (I)	0.33	0.60	0.93	0.31	0.06	0.28	0.22	0.36
Crop phase (C)	0.56	0.03*	0.19	0.90	0.07	0.15	0.04*	0.43
I × C	0.85	0.34	0.98	0.60	0.57	0.50	0.56	0.39
Nematicide (N)	0.02*	0.10	< 0.01**	0.75	0.02*	0.01**	< 0.01**	0.42
I × N	0.07	0.64	0.52	0.39	0.57	0.44	0.03*	0.50
C × N	0.42	0.01**	0.06	0.25	0.25	0.06	0.02*	0.28
I × C × N	0.64	0.09	0.29	0.37	0.40	0.15	0.09	0.24

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.