Posts in Weeds
Rice weed resistance testing- Link (February 2015)

This RIRDC report presents baseline data to assist in assesing herbicide resistance in the rice industry in Australia. Herbicide resistance is a major concern for the sustainability of the rice industry. This concern has occurred as a result of the high levels of resistance reported previously to bensulfuron, one of the major herbicides across the rice growing regions of southern New South Wales. As result there is concern that selection pressure has been placed on other herbicides for the potential to develop herbicide resistant weeds. As part of the project samples of five plant species were collected; dirty dora, starfruit, arrowhead, water plantain and barnyard grass. The barnyard grass samples were screened for resistance to two Group A herbicides, cyhalofop and butroxydim while the other species were screened to the herbicide benzofenap.

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Rice Extension on the New Grower Services Web Portal for SunRice (2014)

Access to the RICE EXTENSION TAB will be for all growers who will have a login, and also to Advisors, non-SunRice growers, researchers who will need to be set up with a login password access. This group are an important link for future extension to be successful.

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Weed Management in Australian Rice: Final Report for Seasons 2008 - 2012- Link (2014)

This RIRDC report presents information on weed management in direct seeded rice crops. Through the seasons of 2008-12 seasons this project focuses at improving residual grass weed control in drill seeded rice crops and searching for alternative mode of action herbicides for sedge and broadleaf weed control in water seeded rice. The report is targeted at Agronomists and ricegrowers. There were 5 key objectives undertaken for this project and these included; to evaluate mixtures of clomazone and pendimethalin with the possibility of improving the reliability of residual herbicides for grass weed control in drill seeded rice. Testing a wider range of application rates for clomazone plus pendimethalin than in previous seasons. Confirming previous encouraging results with these mixtures.  Indentfying new and alternate mode of action herbicides that can be integrated into weed control programs for both drill seeded and water seeded rice. Assisting with training of the agronomic network (public and private) in understanding best practices for achieving freedom of weed competition in direct seeded rice to ensure maximum yield potential is attained. Methods used were commercial crops and experimental sites using trial designs of  randomised complete blocks using three or four replications of 12-16 treatments. Plots measured 3m x 8m. Drill sown plots and water seeded plots were included. Each plot was assessed visually for cold tolerance and weed control. Herbicides were applied with hand held boom sprayer, weed counts were undertaken and grain yield were obtained. Extensive findings were found and for best information reading report is advisable. 

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Improving rice water use efficiency - Direct Drilling of rice and Precision Farming (June 2014)


Water use efficiency is a driving factor for the Australian rice industry. Australian rice farmers grow rice in one of the driest continents in the world, achieving some of the world’s highest yields per hectare and water use efficiency per kilogram produced (Dunn & Pal Singh, 2013). In recent years, the availability of water for agricultural production has been reduced significantly as a result of government policy. Australian rice farmers are also under constant scrutiny to justify their water usage, so need to develop new technologies and practices. Historically Australia is one of the few countries to establish a rice crop by flying rice seed into a flooded bay. The majority of the countries visited establish their crops by drilling seed into the soil and establish by flushing. In Australia, this technique could be more broadly adopted with significant savings in water use and input costs.

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Sequential herbicide programs in delayed permanent water rice (March 2014)

This Poster presented by Malcolm Taylor at the Rice field day at RRAPL in March 2014. The Poster presents results from 2013/14 season of experiment on Sequential herbicide programs in delayed permanent water in rice. The conclusion presented in drill sown rice was increasing Stomp to 2.5l/ha plus Magister to 0.l/ha will improve barnyard grass control. It is important to note that crop safety can be compromised if extra stress on rice seedling establishment occurs. It also concluded that an alternative to group A herbicide the use for late barnyard grass germination was a mixture of Ordram and Stam with addition of Saturn if you used prior to permanent inundation in drill sown rice. 

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Rice field guide to pests, disease and weeds in southern New South Wales. (2013)

This DPI NSW rice field guide covers pests such as Bloodworms, Water snails, Leafminers, Aquatic earthworm, Common armyworm, Sugarcane and maize stemborer Tadpole shrimp , Yabbies, Locusts and grasshoppers Exotic pest threats. It also covers diseases such as Damping off, Stem rot, Downy mildew Cochliobolus leaf spot Sheath spot Aggregate sheath spot Glume blotch, Sheath brown rot Sheath and glume rot Exotic disease threats. Finally is gives details of weeds such as Impact of sowing method Integrated weed management Barnyard grasses, Silvertop grass, Dirty Dora Starfruit Arrowhead Alisma, Water plantain Sagittaria, Umbrella sedge Water couch Cumbungi (bulrush) Rushes, Common spike rush Bolboschoenus Alligator weed Water primrose Chara and Nitella. Each pest, disease and weeds has its lifecycle, crop damage, management, origins and key characteristics described to assist farmers. 

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