Show simple item record Charles, Graham 2016-02-03T06:27:34Z 2016-02-03T06:27:34Z 2012-06-30
dc.description.abstract Herbicide damage is an ever increasing challenge for much of the cotton industry due largely to: . the increasing complexity in the farming system (with a wide range of herbicides used), . the increasing trend to minimum/zero tillage (using more herbicides for fallow weed control), . difficulties in controlling fallow weeds (eg. fleabane and feathertop Rhodes grass), and . increasing climatic uncertainty (need to treat weed flushes in a shorttime frame and maintain soil moisture). Continuing herbicide damage is threatening the profitability of the cotton industry and in some areas may threaten the viability of the industry. Unfortunately, there is no easy solution. Crops generally will recover from herbicide damage, but in many instances with delayed maturity and reduced yields. Over the last 3 years, CRC Project 1.01.49 has been developing a valuable herbicide damage data set which will be expanded in the new project. This data set currently gives detailed it Iformation on 2-4-D, bromoxynil, dicamba, MCPA, glyphosate, Spray. Seed and Starane damage, with data from other phenoxy herbicides to be added soon. Work is needed on the implications of lower rates of 2,4-D and multiple damage events and to further expand the range of herbicides and rates included in the database now available on the web.The 2nd part of the project involves the development of a readily assessable weed control threshold for cotton. The threshold is essential if the industry is to fully realise the value of herbicide tolerant cotton. The threshold based on the Critical Period for Weed Control was an important outcome from project CRC 126 and a large step forward. The shortcomings of this threshold are that it * is based on single weed types and does not integrate across types, and * is based on a visual estimation of weed species and density which are difficult and time consuming to accurately measure over a whole field, where weeds are often patchy. The next step is to develop a user-friendly, readily applied weed control threshold based on weed biomass, which integrates weed species and density. en_US
dc.description.sponsorship CRDC en_US
dc.publisher NSW Department of Primary Industries en_US
dc.relation.ispartofseries ;CRC1003
dc.relation.ispartofseries ;1.01.64
dc.relation.ispartofseries ;CRC 126
dc.subject integrated weed management en_US
dc.subject herbicide en_US
dc.subject damage en_US
dc.subject zero tillage en_US
dc.subject fallow weeds en_US
dc.subject farming system en_US
dc.subject challenges en_US
dc.subject threshold en_US
dc.subject future direction en_US
dc.subject extension and adoption en_US
dc.subject glyphosate resistance en_US
dc.subject resistance monitoring en_US
dc.subject fleabane and feathertop Rhodes grass en_US
dc.subject profitability en_US
dc.subject impacts en_US
dc.subject cotton farms en_US
dc.subject BMP en_US
dc.subject extension and adoption en_US
dc.subject Australia en_US
dc.title Managing Weeds and Herbicides in a Genetically Modified Cotton Farming System en_US
dc.type Technical Report en_US

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