Environmental Engineering Reference
In-Depth Information
compared with the actual costs expended to 2004 in 10 successful projects (C), three still being monitored (M), seven ongoing projects (O), and
one where eradication failed (F). The lowest fi gure for each case study is given in bold font. Table modifi ed after Woldendorp and Bomford (2004).
Species
Net area (ha)
Costs (AU$)
Cunningham et al. (2003)
Woldendorp and Bomford (2004)
Actual costs to 2004
Centaurea trichocephala
C
<
1
56,800
20,000
1378
Eichhornia crassipes
C
2.4
287,100
35,600
8800
Eupatorium serotinum
C
0.5
64,700
12,600
9842
Helenium amarum
C
<50
290,000
276,300
72,835
Hieracium pilosella
C
0.005
14,900
600
394
Jatropha curcas
C
0.25
34,500
7900
4331
Pueraria phaseoloides
C
0.04
14,900
2300
2953
Salvinia molesta
C
3.6
35,200
47,300
30,460
3277
1
Bassia scoparia
C
589,900
4,570,100
494,581
Andopogon virginicus
M
0.001
40,000
200
197
Cenchrus echinatus
M
63.6
512,900
324,700
1,995,000
Eichornia crassipes
M
2
81,500
31,900
>
11,500
Alternanthera philoxeroides
O
1
287,100
20,000
800,000
Citharexylum gentryi
O
171
589,900
630,400
141,338
Cleome rutidosperma
O
<10
204,400
93,900
42,000
Hypocharis radicata
O
15
473,400
123,200
9158
Paspalum uvillei
O
1
124,000
20,000
2953
Rubus glaucus
O
5
411,600
59,000
13,904
Spartina angelica
O
75
337,000
362,300
>
1,000,000
Chondrilla juncea
F
3400
555,600
4,684,500
56,000,000
1
Subsequent checks of infestation records indicate a total net area of 2480ha (F.D. Panetta, unpubl. data).
