Assessing the Invasion Risk of Eucalyptus in the United States Using the Australian Weed Risk Assessment

Table 1

Taxa assessed using the Weed Risk Assessment (WRA) modified for the USA [22], with WRA results from other assessments for comparison.

No.^a	Species	Subgenus	USA score	Other published score(s)	Risk level
1	Eucalyptus dorrigoensis	Symphyomyrtus	−3	—	Low
2	Eucalyptus dunnii	Symphyomyrtus	−2	0^b	Low
3	Eucalyptus salubris	Symphyomyrtus	−1	−3^b, −2^c	Low
4	Eucalyptus amplifolia	Symphyomyrtus	0	2^d	Low
5	Eucalyptus benthamii	Symphyomyrtus	0	—	Low
6	Eucalyptus stoatei	Symphyomyrtus	0	−2^b	Low
7	Eucalyptus cloeziana	Idiogenes	1	−1^b	Low^e
8	Eucalyptus nitens	Symphyomyrtus	1	—	Low^e
9	Eucalyptus smithii	Symphyomyrtus	1	—	Low^e
10	Eucalyptus caesia	Symphyomyrtus	1	0^b	Evaluate
11	Eucalyptus gardneri	Symphyomyrtus	2	0^b	Low^e
12	Eucalyptus gunnii	Symphyomyrtus	2	—	Low^e
13	Eucalyptus erythrocorys	Eudesmia	2	6^b	Evaluate
14	Eucalyptus platypus	Symphyomyrtus	2	0^b	Evaluate
15	Eucalyptus pellita	Symphyomyrtus	3	3^b	Evaluate
16	Eucalyptus kruseana	Symphyomyrtus	4	0^b	Low^e
17	Eucalyptus macrocarpa	Symphyomyrtus	4	3^b	Low^e
18	Eucalyptus urograndis (=E. grandis X E. urophylla)	Symphyomyrtus	4	—	Evaluate
19	Eucalyptus microcorys	Alveolata	5	1^b, 0^c	Low^e
20	Eucalyptus torquata	Symphyomyrtus	5	−1^b	Low^e
21	Eucalyptus intermedia (=Corymbia intermedia)	Corymbia	5	1^b	Evaluate
22	Eucalyptus yarraensis	Symphyomyrtus	5	1^b	Evaluate
23	Eucalyptus crebra	Symphyomyrtus	6	−1^b, −1^c	Evaluate
24	Eucalyptus macarthurii	Symphyomyrtus	6	—	Evaluate
25	Eucalyptus cinerea	Symphyomyrtus	7	4^b	High
26	Eucalyptus paniculata	Symphyomyrtus	7	11^b, 6^c	High
27	Eucalyptus sideroxylon	Symphyomyrtus	7	2^b	High
28	Eucalyptus urophylla	Symphyomyrtus	7	4^b	High
29	Eucalyptus deglupta	Symphyomyrtus	8	2^b	High
30	Eucalyptus saligna	Symphyomyrtus	9	7^b	High
31	Eucalyptus grandis	Symphyomyrtus	10	11^b, 8^d	High
32	Eucalyptus tereticornis	Symphyomyrtus	10	5^b	High
33	Eucalyptus viminalis	Symphyomyrtus	10	—	High
34	Eucalyptus robusta	Symphyomyrtus	11	3^b, −1^c	High
35	Eucalyptus citriodora (=Corymbia citriodora)	Corymbia	12	9^b, 6^c	High
36	Eucalyptus torelliana (=Corymbia torelliana)	Corymbia	13	4^b	High
37	Eucalyptus camaldulensis	Symphyomyrtus	18	12^d	High
38	Eucalyptus globulus	Symphyomyrtus	18	10^b	High

^aThe taxon number corresponds to the number on the bars in Figure 1.
^b[23, 24]: Hawaii and Pacific.
^c[25]: Tanzania.
^d[26]: U.S.
^eOutcome determined after use of the secondary screen [23].