Geographical Distribution and Long-Term Monitoring of <i>Physokermes hellenicus</i> (Hemiptera: Coccomorpha: Coccidae) on <i>Abies</i> spp. (Pinales: Pinaceae) in Greece.

hellenicus infestation exhibited a decreasing trend in the three mountains, which was more obvious at Menalon.

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The analysis at the three mountains during the sampling period revealed a negative trend according to the estimated equation models in Menalon (infestation = −5.9879 × year + 12083; R 2 = 0.9392), Parnis (infestation = −1.8073 × year + 3672.4; R 2 = 0.4834) and Tymfristos (infestation = −1.4211 × year + 2873.8; R 2 = 0.8179) ( Figure 3 ).

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