Emergence patterns and herbicide control of prickly lettuce (Lactuca serriola L.)

Hanwen Wu, Adam J Shephard, Michael Hopwood

Research output: Book chapter/Published conference paperConference paperpeer-review


Prickly lettuce (Lactuca serriola L.), an annual or biennial plant, is becoming an increasing problem in southern New South Wales; mostly in cereals and legume pastures. This study showed that eight prickly lettuce populations differed in their final cumulative emergence in a seedling tray trial, ranging from 39 to 341 plants m−2, however, they had similar emergence patterns, with 69% emergence in late autumn and early winter, 27% in later winter, 2.4% in spring in the first year after burial and only 1.6% emergence between autumn and winter in the second year. Prickly lettuce in wheat also followed similar emergence patterns, but it had higher emergence (7.5%) between autumn and winter in the second year. In addition, the total emergence in wheat was only one tenth of that in the seedling trays (without competition). Glyphosate, 2,4-D amine + glyphosate, metsulfuron-methyl+ glyphosate, glufosinate ammonium and fluroxypyr controlled mature prickly lettuce plants by 90–95%.Paraquat consistently achieved 100% control eitherused alone or as a ‘double knock’ treatment.
Original languageEnglish
Title of host publicationProceedings of the 21st Australian Weed Conference
Subtitle of host publicationWeed Biosecurity - Protecting our Future
EditorsStephen Johnson, Leslie Weston, Hanwen Wu, Bruce Auld
PublisherWeed Society of NSW
Number of pages5
ISBN (Print)9780995415911
Publication statusPublished - 2018
Event21st Australasian Weeds Conference 2018: Weed biosecurity - Protecting our future - Novotel Sydney Manly Pacific, Manly, Australia
Duration: 09 Sep 201813 Sep 2018
http://caws.org.nz/old-site/awc_contents.php?yr=2018 (conference proceedings)
https://abercrombie.eventsair.com/QuickEventWebsitePortal/21awc/21awc-web/Agenda (conference program)


Conference21st Australasian Weeds Conference 2018
OtherThe Weed Society of New South Wales Inc., on behalf of the Council of Australasian Weed Societies Inc., will be hosting the 21st Australasian Weeds Conference in the popular Sydney beach side suburb of Manly from 9 - 12 September 2018.  An assortment of field trips will be hosted on Thursday 13 September 2018.

This biennial conference carries on a long tradition of bringing the weed management community together to discuss new developments and share information about cutting-edge and best weed management practices.

The conference attracts over 250 delegates from across Australasia and globally.  Delegates will come together to network with peers, engage with industry sponsors, listen and participate in presentations and field trips on a variety of topics including; 
- New technologies in weed management.
- Biological, mechanical, and chemical weed control and research.
- Herbicide resistance.
- Weeds of crops and pastures.
- Environmental weeds and Weeds of National Significance.
Internet address


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