Appropriate spatial range for emergency control of <i>Plum pox virus</i> (PPV)

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  • ウメ輪紋病の緊急防除における防除範囲の妥当性
  • ウメ リンモンビョウ ノ キンキュウ ボウジョ ニ オケル ボウジョ ハンイ ノ ダトウセイ

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Abstract

<p>Emergency control of Plum pox virus (PPV; genus Potyvirus) has been conducted in Japan since its first discovery in 2009. Symptoms emerge about 3 years after the transmission of PPV to plants by aphids. Therefore, to eradicate PPV, it is necessary to remove all potential host plants within a spatial area that has a significant probability of infection during the 3-year incubation period. Based on empirical studies, a radius of 500 m was adopted as the emergency control range in 2013. In the current study, we used a gamma model to estimate aphid dispersal by considering non-random aphid movement patterns. The probability of infection at a distance of 500 m was estimated to be about 0.5%, indicating that the currently adopted emergency control range is appropriate. We further estimated that the minimum distance to ensure a basic disease reproduction rate of < 1 was about 607 m, assuming that all potential host plants within that distance are removed. An additional buffer zone of 500 m would be effective for maintaining areas of low pest prevalence (ALPPs) against PPV.</p>

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