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Catalogue: GRDC Publications
" Goondiwindi GRDC Grains Research Update Day 1 - Tuesday 4 th March Time Topic Speaker (s) 10:00 AM James Clark (Chair Northern Welcome Panel GRDC) 10:10 AM General plenary (Supported by North West Local Land Services) 10:10 AM 10:40 AM.. Overall, both models are acceptable for modelling soil evaporation over a range of soils and seasons provided accurate soil physical properties and starting water states are known... Overall, populations increased five times compared to before planting the summer crops, but remained below 250/kg soil (Figure 4)...
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Catalogue: GRDC Publications
GRDC Grains Research Update Goondiwindi, March 2014 as yields increase, i.e. the bug threshold for a 4t/ha soybean crop is twice that for a 2t/ha crop (Fig. 2), and similarly for mungbeans - see comparison between 1t/ha and 2t/ha crops (Fig. 3)... In summary, action thresholds for edible soybeans and mungbeans are set for bug populations predicted to damage 2% and 1.4% of seeds respectively... GRDC Grains Research Update Goondiwindi, March 2014 rule of thumb, aim to sample 5 widely-separated sites throughout a crop, with at least 4 x 1 m samples per site...
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Catalogue: GRDC Updates
Taking the angst out of thresholds in the computer age.. Podsucking bug thresholds are based on seed quality, and are influenced by a multitude of factors, including bug species, bug stage, yield, mean seed weight, time to harvest, and for crushing soybeans; crop value and cost of control... Given the 4-way interaction of cost of control, crop value, yield and mean seed weight in crushing soybean thresholds, the only way to determine bug thresholds is with the new downloadable threshold calculator...
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