RAINFALL throughout the New England is well below average and many species are struggling to survive, except for some of the most drought tolerant.
Paterson’s Curse and Viper’s Bugloss are closely related, both being in the Echium family and seem to be happy in the dry conditions.
Both species have been declared noxious in the New England and need to be controlled.
Both are toxic to stock, can cause allergies in humans and can aggressively out compete desirable species.
Paterson’s Curse (Echium plantagineum), also known as Salvation Jane, is a major weed in winter pastures throughout Australia. It is a prolific seeder that can produce more than 5000 seeds per plant.
Seeds may remain dormant in the soil for up to five years. Plants die soon after flowering. Flowers are mostly purple although white, blue and pink sometimes appear.
Viper’s Bugloss (Echium vulgare) usually grows in cool areas and is often a roadside weed in the Northern Tablelands.
Its leaves are narrower than those of Paterson’s Curse and are on a pronounced flower spike about 50cm high.
The flowers are more of a blue colour and are smaller.
Both are considered weeds as they reduce pasture productivity and are toxic to stock.
They produce alkaloids, which cause liver damage, reducing lifespan and sometimes resulting in death.
Pigs and horses are highly susceptible, cattle moderately susceptible and sheep and goats least susceptible.
Although these plants are considered highly desirable by bee keepers for their large pollen and nectar production, landholders are obliged to control the growth and spread of these plants on their land.
Spread can be reduced by purchasing feed from uninfested sources and cleaning machinery and vehicles before moving out of infested areas.
Control requires a number of approaches, including grazing, pasture renewal and chemical treatment.
Biological controls are also available to assist with control.
For advice on identification and control contact the local weeds officer on 6770 3602 or visit www.newa.com.au
– RUSSEL SMITH,
New England Weeds Authority.
