Calendar for managing declared plants in the South West region
| Weeds | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apple of Sodom | ♦ | ♦ | ♦ | √ | √ | √ | + | + | + | √ | √ | √ | |||
| Arum lily | √ | √ | √ | √ | √ | √ | |||||||||
| Blackberry | √ | √ | √ | + | √ | ||||||||||
| Cape tulip | √ | √ | √ | ||||||||||||
| Cotton bush* | ♦ | ♦ | ♦ | √ | √ | √ | √ | ||||||||
| Doublegee* | √ | √ | √ | √ | + | ||||||||||
| Paterson's curse | √ | √ | √ | √ | √ | + | |||||||||
| Variegated thistle* | √ | √ | √ | √ | √ | + | |||||||||
Key
√ Optimum spraying time - maximum control achieved
♦ Spraying recommended only after summer rains have fallen
+ Spraying can be carried out. Satisfactory control will be achieved using higher rates of herbicide.
* Multiple germinations during the growing season - may require more than one treatment.
Spray recommendations
| Weed | Spray recommendations (Only treat actively growing plants with herbicide) |
|---|---|
| Apple of Sodom Solanum linnaeanum | Amitrole T®: 1 part in 40 parts of water (1:40), plus 10g metsulfuron/100L of water, plus wetting agent at 1 part in 400 parts of water (1:400). |
| Arum lily Zantedeschia aethiopica | Chlorsulfuron: 1g in 50L of water (1:50), plus wetting agent at 1:400. |
| Blackberry Rubus species | Metsulfuron methyl: 10g per 100L (10:100), plus wetting agent at 1:400. |
| Cape tulip Moraea flaccida | Chlorsulfuron: 1g in 50L of water (1:50), plus wetting agent at 1:400. |
| Cotton bush Gomphocarpus fruticosus | Small infestations - pull out by hand, wear gloves. Glyphosate at 2L to 100L of water (2:100), plus 10g metsulfuron/100L of water, plus wetting agent at 1:400. |
| Doublegee Emex australis | Medicamine® **, 2,4-DB**, MCPA**, Tribunil for control in pasture with minimum clover loss. |
| Paterson’s curse Echium plantagineum | Chlorsulfuron: 1g in 50L (20g/ha) of water, plus wetting agent. |
| Variegated thistle Silybum marianum | 2,4-D amine** at 2-5L/ha for seedlings, plus wetting agent at 1:600. Use higher rates for larger plants. |
Note: The herbicides marked ** are subject to the Restricted Spraying Regulations Act 1979.
A permit is required from the Department of Agriculture and Food for any applications of these chemicals within 5km of a commercial vineyard or tomato grower.