2011/12 Summer Trial
1. FEATHERTOP RHODES GRASS (FTR) MANAGEMENT
Two trials investigating the optimal application timing of paraquat double knocks after initial application of glyphosate or other grass active herbicides. Two trials evaluating a range of residual herbicide herbicides for both FTR and general weed spectrum. Two trials examining the compatibility of a selective grass herbicide with a range of broadleaf herbicides for potential use in a fallow situation. We are still looking for additional sites with uniform pressure of FTR.
2. FLEABANE MANAGEMENT
Four trials to be conducted in fallow, screening for effective double knock herbicide combinations that don’t contain a phenoxy
(hormone) product in the first knock. Although these alternative products are not viable as standalone control options they may be suitable when followed by a paraquat application.
3. PARAQUAT EFFICACY
Three trials evaluating paraquat efficacy against fleabane to quantify the level of benefit gained from additives including ‘spike rates’ of other herbicides, nozzle choice or day versus night spraying.
4. MANAGEMENT OF GLYPHOSATE RESISTANT AWNLESS BARNYARD GRASS (ABYG)
Three trials to compare herbicide control strategies on resistant ABYG populations, evaluating alternative products alone and in combination with glyphosate.
5. AWNLESS BARNYARD GRASS RESISTANCE SURVEY
A survey of ABYG resistance levels, in collaboration with NSW DPI and DEEDI, is being planned for the 2011/12 fallow. Intention is to involve ~ 40 agronomists across northen NSW and southern Qld to collect surviving plant samples from up to 5 different paddocks. These samples will be screened by NSW DPI at Tamworth. For more information see the side bar article in this newsletter.
6. SORGHUM NUTRITION
Small plot activity in collaboration with Pacific Seeds to evaluate N, P and S responses in sorghum near Moree.
7. ROOT-LESION NEMATODES IN SUMMER CROPS
NGA is working with DEEDI, Pioneer and Pacific Seeds to generate more information on summer crop variety impact on the build-up of root lesion nematodes. Evaluation in summer 2011 will focus on mungbeans and sorghum.
8. CAMERA SPRAYS – OPTIMISING BOOM SETUP
Large scale comparisons of a range of boom setups evaluating travel speed, boom height, nozzle type etc for commercial camera spray setups. Will need co-operators willing to vary these parameters.
9. ALTERNATIVE MUNGBEAN HERBICIDES
Three trials to screen a range of current and potential herbicide options in mungbean. Trials to be conducted in Crystal and the next variety expected to be released.
10. SCURVY WEED MANAGEMENT
Two trials to screen a range of herbicide options for a localised but difficult to manage weed. Main challenge is finding sites with a suitable population and area of weed infestation for effective comparisons. We are looking for suitable sites with history of scurvy weed problems.