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CRT SA : Winning Autumn Deals 2012
www.crt.com.au There’s always better value at CRT. Go to www.crt.com.au to register and receive your next issue via email. Blackleg in canola broken Recent research into blackleg in canola has discovered a range of different genes that can be used in the same way as herbicide resistance groups. These new blackleg resistance groups could establish new ways of managing this disease and provide new tools for agronomists to use as part of an integrated disease management package to help maximise growers’ returns. The research will be integrated with knowledge of adult plant resistance and the use of both seed dressings including Jockey® and foliar fungicides such as Prosaro® which has been used under permit from the APVMA for a ‘whole of crop’ disease management strategy. This approach will be increasingly important given the renewed interest in cropping canola, especially with the price of other break crops suffering and the increasing use of canola as a grazing crop. Increased areas of canola will place pressure on the present blackleg resistance mechanisms, especially where the cropping rotation is being closed up or shortened in an attempt to increase farm profits. Past history has shown that blackleg resistance can be broken down quickly. Consequently, there is the need to manage present resistance genes in a more sustainable way. Traditionally, longer rotations between each canola crop, together with seed treatments such as Jockey, have been the main approach. However, opportunities which could develop from this new research suggest improved options are on the way. More details on this exciting development can be obtained from your local CRT agronomist. Grain treatments in for the long run In response to fluctuating grain markets, many farmers have elected to store grain either on-farm or at their local silo whilst waiting for stronger pricing signals. One of the issues with storing grain on- farm over longer periods is that insect control can sometimes be overlooked and when the grain is sold it fails to meet market specifications due to damage. A significant issue in the management of stored grain is the level of resistance across most insecticide groups and the relative expense of being able to buy and manage sealed silos. Key to managing pests in stored grain is the development of strategies that will meet the requirements of your grain buyer and end market. Storage hygiene, including the cleaning of all surfaces and the removal of old grain from around sheds and silos, is essential. As stored grain insects prefer higher moisture levels, grain to be stored on-farm should be dry and, if possible, kept cool as moist, warm conditions increase the speed at which insect populations increase. Monitoring stored grain should be done regularly. Checking around shutes and hatches and sieving grain to detect insects is an easy way to identify issues. Accurate mixing and application of products such as ReldanTM and ReldanTM pluS (depending on your state) applied as a dilute mixture to grain being stored is essential for protecting grain quality. If you are unsure of what insects are likely to attack your stored grain consult with CRT agronomist. Opportunities which could develop from this new research suggest improved options are on the way. Crop Protection TechUpdate–Autumn2012
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