Table 1. Associations of RSV severity with density and viruliferous characters of SBPH in Jiangsu Province (Data summed across all sites).

		Severity in unsprayed fields			Severity in sprayed fields
		Preceding year	Current year	Following year	Preceding year	Current year	Following year
Preceding year	Q0	−0.076	−0.147	−0.117	0.098	0.067	0.133
	V0	0.652**	0.528**	0.426**	0.474**	0.346*	−0.008
	Q1	0.014	−0.107	−0.118	−0.012	−0.056	0.012
	V1	0.814**	0.756**	0.684**	0.646**	0.510**	0.195
	Qmax	−0.447**	−0.622**	−0.723**	−0.465**	−0.568**	−0.556**
	QV0	0.139	0.063	0.057	0.267	0.238	0.237
	QV1	0.190	0.254	0.458**	0.151	0.197	0.196
Current year	Q0	−0.015	−0.076	−0.147	0.164	0.098	0.067
	V0	0.601**	0.652**	0.528**	0.645**	0.474**	0.346*
	Q1	0.187	0.014	−0.107	0.180	−0.012	−0.056
	V1	0.758**	0.814**	0.756**	0.775**	0.646**	0.510**
	Qmax	−0.356*	−0.447**	−0.622**	−0.332*	−0.465**	−0.568**
	QV0	0.099	0.139	0.063	0.355*	0.267	0.238
	QV1	0.246	0.190	0.254	0.278	0.151	0.197
Following year	Q0	−0.043	−0.015	−0.076	0.169	0.164	0.098
	V0	0.456**	0.601**	0.652**	0.640**	0.645**	0.474**
	Q1	0.216	0.187	0.014	0.259	0.180	−0.012
	V1	0.401*	0.758**	0.814**	0.824**	0.775**	0.646**
	Qmax	−0.331*	−0.356*	−0.447**	−0.239	−0.332*	−0.465**
	QV0	0.012	0.099	0.139	0.239	0.355*	0.267
	QV1	0.291	0.246	0.190	0.479**	0.278	0.151

Q₀: overwintering SBPH density, V₀: viruliferous rate of overwintering SBPH, Q₁: first generation SBPH density, V₁: viruliferous rate of first generation SBPH, Q_max: SBPH density of peak stage, QV₀: viruliferous population density of overwintering SBPH (Q₀ × V₀), QV₁: viruliferous population density of first generation SBPH (Q₁ × V₁).

**significant at p = 0.01; *significant at p = 0.05.