Phytophthora alni Scorecard

Species:  Phytophthora alni

Common Name:  Alder Phytophthora

Scorecard created on
Last Updated on

Results

Impact Total:16 / 35Impact = ( Spread + Damage - Benefit )

Ability to Respond Total:10 / 25Ability to Respond = ( Ease of Response + Tools in Place )

Confidence:Medium

Confidence Notes:

Impact

SpreadNotesScore
Spread RateIt has spread very far in Europe and has hit the four species of european Alder. First found in US in 2008 in Alaska.5
Spread AmountIn CA White and Italian Alder are common landscape trees widely planted and there are 4 species of native alders as well.4
DamageNotesScore
EcologicalKills Alder trees, which are important to riparian zones4
Agricultural0
Infrastructure1
CulturalCommon landscape alders may perish.2
Health0
BenefitNotesScore
Ecological0
Agricultural0
Infrastructure0
Cultural0
Health0
Total16

Ability to Respond

Ease of ResponseNotesScore
DetectionEasy, In late summer, diseased trees have abnormally sparse, small, yellow leaves.4
ControlDifferent tecniques are being tried in Europe. Coppicing, cutting trees 20 to 30 cm above ground and allowing for regrowth from sprouts.1
Tools in PlaceNotesScore
Entry2
Control2
OutreachOutreach through landscapers and nurseries.1
Total10

References

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