Blackberry | Year | %decline | Spread K |
Rust | 1990 | 5 | 0.1 |
1993 | 15 | 0.5 | |
1996 | 30 | 1.5 | |
1999 | 50 | 3 | |
2002 | 55 | 5 | |
2005 | 55 | 12 | |
2008 | 60 | 16 | |
2011 | 75 | 25 |
Many thanks to www.northwestweeds.com.au for all of your continued support and permission of image use.