Weeds and Pests

North Byron Bitou Control Program

As per Council resolution 09-465 on 11 June 2009, Council will not be participating in the aerial spray of bitou bush this year.

National Parks and Wildlife Service will be undertaking the treatment in Cape Byron, Broken Head, Billinudgel and Brunswick Heads Nature Reserves/ National Parks as planned.

No spraying will occur on Council managed land and Council has no further involvement in the operation.

Any public enquiries can now be directed to the National Parks and Wildlife Service Byron Coast office on 02 6620 9300

Aerial Spraying - Frequently Asked Questions

What are the herbicides you are using in your spray program?

There are two herbicides used for aerial spraying of bitou bush: glyphosate and metsulfuron methyl.
Glyphosate - is a non-volatile, water soluble, non-residual herbicide
Metsulfuron methyl - is a non-volatile, water soluble, residual herbicide

Will the herbicide spray have ill effects on me and my family's health?

The manufacturers of glyphosate and metsulfuron methyl have done extensive toxicological studies on humans to ensure that their products are safe when used according to the label directions. The mode of action of both herbicides is targeted at biochemical processes that occur only in plants.

Will the herbicide remain in the soil or ground water?

Glyphosate and metsulfuron methyl are both biodegradable.

Glyphosate bonds to soil particles, limiting its movement within the soil. In soil and water glyphosate is broken down by micro-organisms into natural products.

In the soil metsulfuron methyl is broken down to non-herbicidal products by soil micro-organisms and chemical hydrolysis. Metsulfuron methyl is highly mobile in soil and may move within the soil profile. However, the extremely low rates used in aerial application minimise the potential for metsulfuron methyl to leach into ground water.
Am I getting sprayed, because I can smell the herbicide?

The herbicides used for the aerial spraying of bitou bush have little odour, thus the smell you can detect is most likely the fuel fumes from the helicopter and not herbicide.

How long after spraying is completed is it safe to enter the sprayed area?

You can safely enter a sprayed area as soon as the spray has dried. Depending on the weather conditions, this is usually between 30 minutes and an hour after spraying. The operations manager will assess this, and only after it is safe will any closed areas be re-opened to the public.

How long after spraying is completed can I let my pet animal run through the bush and will the herbicide have any effect on it?

Your pet animal can safely enter a sprayed area as soon as the spray has dried. Depending on the weather conditions, this is usually between 30 minutes and an hour after spraying. The operations manager will assess this, and only after it is safe will any closed areas be re-opened to the public. The herbicides used are safe for animals when used according to the label directions, as the modes of action are specifically targeted at plant biochemical processes.

Will aerial spraying affect native plants or animals?

The rates of herbicide used for helicopter boom spraying of bitou bush are lower than the rates used for ground spraying. Extensive trials have revealed that low application rates of herbicide applied in winter can kill bitou bush with limited damage to native species. The herbicide manufacturers have done extensive toxicological studies on a range of animals to ensure that their products are safe when used according to the label directions