Biology, 28.12.2019 01:31 leo4687

The dutch elm pathogen is spread from an infected elm tree to a healthy tree by1.wind-blown or rain-splashed spores2.root grafts3.both wind-blown/rain-splashed spores and infested elm bark beetles4.both infested elm bark beetles and root grafts5.infested elm bark beetles

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The dutch elm pathogen is spread from an infected elm tree to a healthy tree by1.wind-blown or rain-...