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Alik [6]
3 years ago
11

The Dutch elm pathogen is spread from an infected elm tree to a healthy tree by1.wind-blown or rain-splashed spores2.root grafts

3.both wind-blown/rain-splashed spores and infested elm bark beetles4.both infested elm bark beetles and root grafts5.infested elm bark beetles
Biology
1 answer:
Troyanec [42]3 years ago
4 0

Answer:

5. infested elm bark beetles

Explanation:

Research publication (TERRY A. TATTAR, in Diseases of Shade Trees (Revised Edition), 1989) provided the detail on Dutch elm disease. According to researcher it is caused by <em>Ceratocystis ulmi</em> (fungus). Elm bark beetles carry this fungus from infected wood to the healthy wood.

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