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Percent mean (±SE) increase in GLRaV-infected vines after insecticidal control of P. maritimus for (A) year 2 at vineyard A, (B) year 2 at vineyard B, and (C) year 3 at vineyard B. No insecticidal control was applied in year 3 at vineyard B. Asterisk indicates significant difference according to a t-test (α = 0.05).
