Skip to content

Winning the war on weeds

Published 30 Mar 2020 by Ian Haverly

I first visited Goonderoo Reserve back in May 2017 to serve a stint as caretaker for seven weeks. Goonderoo, a Brigalow landscape, had a major infestation of Sword Pear (Acanthocereus tetragonu) across a substantial part of the reserve. In fact, the pastoral paddock next to Goonderoo is classified as the worst site for Sword Pear in the whole of Queensland!

Before my visit Paul Hales, (Northern Savannah Healthy Landscape Manager), had test trialled various herbicides to determine the most effective treatment to tackle the Sword Pear infestation. The magic solution known as ‘Brew F’ was found to be very effective in killing the cactus as can be seen in the before and after photos. During my stay I systematically treated all paddocks on the reserve.

To be effective each finger of the cactus (some of which were as much as 2m high, 20m across and 5m deep) needs to coated until run off with the herbicide. Due to the nature of the terrain most of this has to be carried out on foot with a backpack, crashing through the bush to get to each plant.

I returned to Goonderoo in 2018 to find that although the herbicide is very effective in killing the cactus, due to its size and structure a second and even third follow up treatment is needed. This ‘Stage 2’, as I call it, is where the majority of the plant is dead but may have survived at the core to re-sprout or have produced ‘babies’ prior to dying.

During my stays in May and September that year I surveyed and mapped the entire 593 hectare reserve, mostly on foot, to determine the extent and progress of the treatment regime and to find the yet untreated plants. I then proceeded to treat all the plants found using about 1,500 litres of herbicide, mostly via backpack.

This year in February I arrived back at Goonderoo to check on the cactus and I’m pleased to report that the number of surviving cactus is dramatically down across the paddocks surveyed. In fact, in some of the lessor infested paddocks the number of surviving cactus is minimal and we've reached ‘Stage 3’ – a point of tracking down entirely new plants that have sprouted since the previous year from seed.

The war againt Sword Pear at Goonderoo may not yet be over, but with my help and that of other Bush Heritage volunteers it's certainly being won.
A disintegrating plant following treatment A disintegrating plant following treatment
A "big baby" needing followup treatment A "big baby" needing followup treatment
Aerial view of brigalow scrub showing encroachment of Sword Cactus prior to 2017 Aerial view of brigalow scrub showing encroachment of Sword Cactus prior to 2017

Related stories

Buckrabanyule landscape. Photo Stu Heppell.

BUSHTRACKS 14/01/2022

Beyond the cactus

Together with Dja Dja Wurrung Traditional Owners we are walking to Dhelkunya Dja (heal Country) at one of Victoria’s most heavily infested Wheel Cactus sites.

Read More

BLOG 15/09/2020

Weed management at Tarcutta

This year has been a volunteer year like no other. As we slowly begin to move back into our new normal, our volunteers are able to move back into the field in their home states. Volunteer Stephen Gye has written about his recent trip to our Tarcutta Hills Reserve to help with weed management.

Read More

BLOG 28/08/2020

Removing Paterson's Curse

With its vibrant purple flowers, Paterson’s Curse is often mistaken for a native wildflower but is in fact one of the most conspicuous weeds in paddocks and roadsides throughout Australia. Supposedly named after the Paterson family of Cumberoona, New South Wales - who planted it in their garden in the 1880s – the weed is now highly competitive in disturbed land, competing with agricultural crops and pastures, and unique and fragile native species. It was introduced to Australia from Europe.

Read More

BLOG 26/08/2020

Siaming solo in 2020?

Annual 'siaming' at Yourka Reserve took on a whole new look in 2020. This year, for the first time in 11 years, we faced the daunting prospect of siaming solo. With travel restrictions in place to prevent the spread of covid-19, it was impossible to recruit a team of volunteers to help with the annual survey and treatment.

Read More

BLOG 30/03/2020

Winning the war on weeds

Long-term volunteer and renowned 'King of Cactus', Ian Haverly, describes how we're winning the war on Goonderoo Reserve's sword cactus infestation.

Read More

BLOG 30/10/2019

Plucking weeds from the wildflowers

Charles Darwin Reserve has once again celebrated its annual spring weeding session. A group of enthusiastic weeders donned their armor and attacked the inevitable, but diminishing crops of Patterson’s Curse, Double Gees and Brassicas.

Read More

BLOG 04/10/2019

Weeds working bee at Boolcoomatta

In the second week of September 2019 I took the long road across the Barrier Highway and out to South Australia for 12 days of African Boxthorn control on Boolcoomatta Station Reserve.

Read More

BLOG 06/02/2019

Weed control at Wunambal Gaambera

Uunguu Rangers have been doing weed control for many years and their hard work is paying off.

Read More

BLOG 19/10/2018

Woody weeds at Reedy Creek

The dry winter experienced by much of Queensland, including Reedy Creek Reserve, has had at least one positive outcome - perfect conditions to stomp into the swamp. In this often-difficult-to-access country there were some woody weed outbreaks that we needed to address. This past September their time was up.

Read More

BLOG 26/09/2018

The King of Sword Cactus

I'd like to introduce you to Ian Haverly, committed Bush Heritage volunteer and undisputed King of Cactus up here in the northern region.

Read More

BLOG 08/02/2018

Gorse & thistle on Tassie's east coast

Tasmania's east coast was hard to beat as a location for a working bee, so maybe our volunteers got more than a little inspiration from the stunning location. Our team of nine volunteers removed over 800 thistle plants and seedlings, hundreds of gorse plants, and helped with erosion control and South Esk Pine monitoring. Volunteer Helen Tait explains how our working bees are not just about hard work.

Read More

BLOG 30/10/2017

Killing cactus at Goonderoo

Volunteers play an important role in weed control projects across the country. On Goonderoo Reserve in Central Qld, the target species is Sword Cactus (Acanthocereus pentagonus) a tall, columnar cactus that reaches a height of 2-7m. Sword cactus is multi-stemmed and highly spiky. It has the ability to form dense thickets and will dominate a vegetation community to the exclusion of many other plant and animal species.

Read More

BLOG 15/10/2017

Volunteers vs weeds at Boolcoomatta

In September we had an amazing group of 11 volunteers make the long trek to our Boolcoomatta Station Reserve to help with vital weed management. The group were focused on our long-term management strategy to control the African Boxthorn and Pepper Trees in the beautiful Oonatra Creek system.

Read More

BLOG 09/07/2017

Long-term weed management

Bush Heritage volunteers have been running an amazing weed removal effort at Charles Darwin Reserve in Western Australia for around 10 years. The Charles Darwin weeds working bee is run twice a year by volunteer leader and weed expert Janet Dufall.

Read More

BLOG 24/05/2017

Paddy Melon picking at Hamelin

Volunteer Richard McLellan can now add 'Paddy melon picker' to his qualifications after spending a week at Hamelin Station Reserve in Western Australia for some annual leave and a bit of volunteering.

Read More

BLOG 18/05/2016

A weed herbarium for Hamelin

Valued volunteer Charlie Nicholson has provided important help in the West for over 10 years. Charlie's just completed his second stint at Hamelin Station Reserve helping us prepare a weeding manual for volunteers. We're extremely lucky to be able to tap into Charlie's knowledge of the region and his great knowledge of plants and weeds of the Rangelands.

Read More

BUSHTRACKS 21/09/2015

Battling buffel to protect our desert jewel

Bon Bon Station Reserve in South Australia is a true outback marvel, an expansive landscape dotted with shimmering salt lakes, red dune sands supporting mulga trees, open ironstone plains studded with stately myall trees and stunningly beautiful expanses of pearl bluebush. Our challenge is to protect it from invasive Buffel Grass.

Read More
Loading...
{{itemsInCart}} Items - {{formatCurrency(grandTotal)}}