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CRT SA : Spring Big Brands 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. Whilst blackleg in canola can start affecting plants early in the season and cause significant yield losses it is essential that signs of this disease are monitored against cultivar expectations, that is, looking for a breakdown in disease resistance. It is not really a factor of the plant losing its resistance but rather the disease evolving to side-step the plants resistance mechanisms. Keeping an eye on how different canola cultivars perform in the paddock, with and without seed and fertiliser treatments and with and without foliar fungicides, will assist in planning for the 2013 canola crop on your farm. New blackleg resistance groups will be launched towards the end of the year along with information of which of the resistance groups is likely to have broken down in your area. Canola will also need to be closely monitored for sclerotinia later in the season where wet weather at flower drop (petal fall) is likely. If the disease is present canola plants can be affected as the disease develops in the axial of the canola plants branches where petals lodge. The disease then spreads down the stem of the plant with the infection stopping the flow of nutrients and water with a potentially significant reduction in yield. Fungicides have been used in the past to manage this issue and in some countries growers plan a fungicide spray to control sclerotinia infection at about 20% petal fall. However, in Australia the planned use of a spray is not always successful because of local climatic conditions and lack of registered products. Presently, there are only 2 molecules that are registered for the management of sclerotinia including iprodione (Rovral) @ 2L/ha and procymidone (Sumisclex) @ 1L/ha. Both labels have a different time of application and WHPs. Last year there was a limited use permit for the development of Prosaro, however, this use pattern is presently not registered. In managing sclerotinia in canola discuss your requirements with your local CRT agronomist who will have access to the latest trial results, permits and registration information to provide advice on the management of this disease and others in your canola. Crop Protection TechUpdate–Spring2012 Grain storage With harvest getting closer, managing on-farm storage of seed for next season sale or delivery later in the year needs planning with not all grades and markets accepting all grain treatments. As discussed previously, the careful management of silos to make sure they are clean and free of insect pests before harvest is essential if any on-farm storage is being considered. The careful consideration of what type of grain pests and their likely resistance status also needs to be known before effective treatments can be applied to the grain. *Refer to your state regulations for accepted grain treatments. Reldan pluS • Controls insect pests in stored cereal grains (except for malting barley and rice), as well as on surfaces of buildings and grain handling equipment • Uses S-methoprene, the more active S-isomer of methoprene • Combines Reldan with S-methoprene IGR, to provide a wide spectrum grain protection • DO NOT use on malting barley or rice Managing blackleg and sclerotinia in canola
Tax Time Savings May 2012
Super Summer Savings 2012