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Weed Biocontrol newsletter
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2020
Three for the Price of One in Chile
8 August 2020
Chantal Probst, our plant pathology technician, and Randall Milne (Environment Southland), travelled to Chile in November last year to collect starter cultures of the Darwin’s barberry rust (Puccinia berberidis-darwinii) and pampas floral smut (Ustilago quitensis). As is often the case, to maximise ...
Newsletter
Weed biocontrol
Buddleia Be Gone!
8 August 2020
Buddleia (Buddleja davidii) is native to China and is a serious weed in plantation forests, natural habitats and riparian areas in New Zealand, especially in the central North Island. Also commonly known as summer lilac or butterfly bush because of its showy, dense clusters of purple or white flower...
Newsletter
Weed biocontrol
Tale of the Scotch Thistle Gall Fly
8 August 2020
Scotch thistle (Cirsium vulgare) is one of the most common thistle weeds in New Zealand, being present in all regions of the country in a diversity of habitats. The weed is a prolific seed producer, with an average of 200 seeds per seedhead, and individual plants can produce over 50,000 seeds. Scotc...
Newsletter
Weed biocontrol
Spring Activities
8 August 2020
Most biocontrol agents become active during spring, making it a busy time of year to check release sites and move agents around.
Newsletter
Weed biocontrol
Who’s Who in Biological Control of Weeds?
8 August 2020
Alligator weed beetle
(Agasicles hygrophila)
Foliage feeder, common, often provides excellent control on static water bodies.
Alligator weed beetle
(Disonycha argentinensis)
Foliage feeder, released widely in the early 1980s, failed to establish.
Alligator weed moth
(Macrorrhinia endonephele)
...
Newsletter
Weed biocontrol
Further reading & agents released table
8 August 2020
Gavin Loxton (left) and Lindsay Smith (right) at a Canterbury hieracium biocontrol site
Further reading Clarkson B, Paynter Q, Winks C, Bartlam S, Watts C, Thornburrow D 2019. Best-practice guidelines for managing Tradescantia threats to native biodiversity. A research collaboration between BioHeri...
Newsletter
Weed biocontrol
A message from the Editor
5 May 2020
The Weed Biocontrol team at Manaaki Whenua is fortunate to have been able to continue its work during the Covid-19 pandemic. For readers outside of New Zealand, we went into very strict Level 4 lockdown on 26 March for nearly 5 weeks and at the time of writing are in Level 3 (we are now currently at...
Newsletter
Weed biocontrol
Moths away on horehound!
5 May 2020
A little more than a year after the release of the clearwing moth (Chamaesphecia mysiniformis) and the plume moth (Wheeleria spilodactylus) for the biocontrol of horehound (Marrubium vulgare), it was time to return to the release sites to look for early signs of establishment. “We were especially en...
Newsletter
Weed biocontrol
Lesser calamint project steams ahead
5 May 2020
Since our last update on prospects for the biocontrol of lesser calamint (Calaminta nepeta) in New Zealand, much progress has been made with the identification of several promising candidate agents in Europe for prioritisation and further study.
Newsletter
Weed biocontrol
Could an agent for brome tell friend from foe?
5 May 2020
There are over 150 grass species in the genus Bromus. Despite some Bromus species being useful pasture grasses, many are unwanted weeds. Two of the most weedy and problematic Bromus species in New Zealand are downy brome (B. tectorum) and ripgut brome (B. diandrus). Ripgut brome gets its name from t...
Newsletter
Weed biocontrol
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