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CRT Catalogue Pull-out Feature : CRT Spring 2014 - Tech Update
There’s always better value at CRT. Crop Protection Success NeoTM from Dow AgroSciences has put reliability back into spring forage brassicas, according to Dan Sutton, Robert’s Senior Agronomist at Smithton, Tasmania. “We had inherited major resistance issues with synthetic pyrethroid and organophosphate insecticides for diamondback moth control in turnips by 2004/2005,” he said. “We’d get huge flights coming off drying canola crops and cutworm was also a significant problem. If that isn’t controlled the brassica crop doesn’t even establish – it’s just wiped out.” “These pests can be very difficult to detect until the damage is done. It’s easy to lose a whole crop before you even know it’s under attack. It was clearly time for a new approach.” Despite brassicas being very water efficient, Dan said farmers weren’t getting the successful spring brassica crops they should have been getting because insect attacks were completely wiping crops out. “Dow AgroSciences came up with the required novel chemistry, creating SuccessTM 2 and later, Success Neo and when we started using that the results were immediate and dramatic.” “The first thing we noticed was that even though diamondback moth larvae and other caterpillars were dying, the beneficials were unharmed.” “We offer our clients a complete agronomic system including brassica pest control which includes recommending insecticides in pre-sow burn-off herbicides to ensure comprehensive pest control before the crop is sown.” “Post-sowing, we will spray Success Neo according to temperature and pest pressure. Under mild conditions, we may recommend an application 17 days post-emergence. When it’s warm (15̊C) we might be down to 9-10 days and that takes out the initial flush of diamondback moth larvae.” Dan said application time was critical. “We need to time it for after the moth eggs have hatched and the larvae have burrowed into the plant. When they emerge to attack the growing points, that’s when we hit them.” “What makes it tricky is that at this point the crop looks fantastic and you can’t see any holes in the plants. By the time you do, it’s too late and crop potential is gone.” “With Success Neo, if the timing’s right, we also pick up any cutworms that have hatched since the burn-off and you then get a couple of weeks residual action from the Success Neo.” “While this is going on the predators are safe – and building up their numbers. In fact, we spray most crops just once, allowing the beneficials to take over after the first hit.” “It’s all about following the system and spraying at the right time.” The success of Dan’s strategy has been substantiated by several dairy farmers in the area including Stephen Fisher of Togari, multiple winner of the Tasmanian Dairy Farmer of the Year Award, and Marcus Nichols of Marrawah. Both farmers follow Dan’s strategy to the letter, maximising the quality of their forage brassica crops. Marcus runs Friesians, grows approximately four hectares of turnips and is currently trialing lucerne to cope with dry conditions. His crops are Dow Success NeoTM for prompt, precise control of forage brassica pests With spring upon us, a healthy crop in front of us and harvest looming, now’s the time to think about next year’s crops and when you’re planning ahead it’s essential to consider water and nutrient conservation to maximise next year’s yield potential. Herbicide plant-back periods and effective weed, disease and insect management are also critical. In the Grains Research & Development Corporation’s (GRDC) January 2012 Fact Sheet, results showed that summer weed control stands out as the most effective way to conserve summer rain and soil nitrogen for use by subsequent crops. Summer weeds deplete nitrogen from the soil; the more weed bulk (biomass) present, the more nitrogen lost. So it is important to control summer weeds soon after germination.1 Research by Claire Brown, Birchip Cropping Group, Dr James Hunt and Dr Therese McBeath, CSIRO, over four years, showed wheat yield increase of up to 1.6 t/ha as a result of controlling summer weeds. ‘All four years resulted in a positive return on investment (average 347%); even in a wet growing season such as 2010, there has consistently been a positive return on investment from summer weed control’. 2 Forward planning with StatesmanTM 720 To maximise the benefits, fallow sprays need to be managed well and ‘often the most important factor is getting the timing right in relation to weed susceptibility and using a robust rate of product’. 3 StatesmanTM 720 from Dow AgroSciences is a very flexible herbicide solution registered for fallow, in-crop and pasture uses. Product left over from a fallow job can be used next season in-crop or on pastures. Plant-back periods are not restrictive, ranging from 1–28 days depending on the following crop and the rate used. Rainfall requirements may also apply so you should check the label for details. Providing good control of a wide range of broadleaf weeds, Statesman 720 is also compatible with an extensive list of other herbicides, including all IPA-salts of glyphosate, allowing weed control in a single pass. Getting into the paddock early when weeds are seedlings and actively growing will ensure the best results. Some weeds, such as wireweed, wild turnip and heliotrope, can be successfully controlled when sprayed later in their growth so it’s important to know what weeds are in the paddock and to spray when the populations are most susceptible. Statesman 720 is systemic, which makes it more forgiving than other herbicides, but using higher volume sprays (60-90L/ha, increase water rates with increased stubble load) with coarse droplets is recommended. Canola in southern NSW, July 2013. At first glance, it appears to be a missed strip at planting. However, it is actually a missed summer fallow spray strip. Lack of soil moisture in the unsprayed strip led to delayed crop germination. ® TM Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow 1. GRDC, Summer Fallow Management Fact Sheet, January 2012. 2. BCG season research results, 2012 www.bcg.org.au. 3. GRDC, Summer Fallow Spraying Fact Sheet, September 2012. 33514_v3_CRT 2014 Spring Retail Campaign Catalogue_Tech Update.indd 2 29/07/14 12:29 PM
CRT Winter 2014 - Tech Update