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yield reduction

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Catalogue: NVT Online Papers
The research has been conducted in WA wheatbelt to determine if new and existing varieties of barley vary in tolerance to commonly used herbicides... The sensitivity of the variety is summarised, using the following symbols based on the yield responses across all trials: not tested or insufficient data.. (z) no significant yield reductions at recommended rates or higher than recommended rates in (z) trials x% (w/z) narrow margin, % yield reductions at higher than recommended rate, but not tested at recommended rate significant event occurring w years out of z years tested...
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Catalogue: GRDC Publications
Influence of fungicide rate (mean of fungicide products - four site mean) Stem rust control assessed over the four trial sites revealed that using high rates was essential for the control of the disease, even if the fungicide had been applied prophylactically (before infection was visible in the crop)... Influence of cultivar resistance and fungicide application (Prosaro ) on yield and stem rust severity measured on the flag sheath 18 days after fungicide application at early dough (GS82) and assessed at mid dough - physiological maturity (GS85-90) - Bairnsdale, Gippsland, Victoria, 2010... The yield potential for the crop with no nitrogen applied is estimated at GS30 from the results of numerous of trials conducted in that region where NDVI at GS30 is divided by the number of growing degree days (GDD) greater than 0 C since planting, referred to as the INSEY units (in season estimate of yield)...
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Catalogue: GRDC Final Reports
Through a national series of 40 trials and 20 Soil 2 Grain workshops, this project generated a series of guidelines on the tactical use of agrichemicals and nitrogen (N) in cereals during stem elongation... Disease management outputs included the construction of a green leaf duration calculator for making better fungicide decisions, management guidelines for the use of foliar fungicides to control stem rust in wheat, stripe rust control in wheat varieties with adult plant resistance (APR) and powdery mildew in barley... Using a conservative 5% uptake (based on losses estimated by Murray & Brennan of crops with powdery mildew in WA and leaf rust susceptible barley in the northern region) these guidelines could increase margins by an estimated $5 million/year...
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Catalogue: GRDC Updates
Adapting our current practices and varieties to focus on managing the three key phases of crown rot (survival, infection and yield loss) will determine the impact this disease has on your crops in the future... Yield achievement in the presence of crown rot (Figure 2) is perhaps a more useful means of comparing varieties rather than the extent of yield loss associated with infection (Figure 1) as a variety with the smallest yield loss may not always be the highest yield achiever... The agronomy of durum production has not been extensively evaluated in such a western environment due to limited commercial production in the region primarily based around concerns over the high susceptibility of this crop to crown rot...
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Catalogue: NVT Online Papers
The research has been conducted in WA wheatbelt to determine if new and existing varieties of wheat vary in tolerance to commonly used herbicides... The sensitivity of the variety is summarised, using the following symbols based on the yield responses across all trials: - not tested or insufficient data (z) no significant yield reductions at recommended rates or higher than recommended rates in (z) trials x% (w/z) narrow margin, % yield reductions at higher than recommended rate, but not tested at recommended rate significant event occurring w years out of z years tested... The organisations involved in this research do not endorse the use of herbicides above the registered rate or off label use of herbicides or tank mixes...
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Catalogue: GRDC Final Reports
Aphid feeding and virus injuries were evaluated in Australian grains in terms of yield loss and economic loss by aphid species, crop and region... In cereals, yield losses averaged 6% and 23% due to feeding and virus injuries, and in canola yield reductions averaged 23% and 32%, respectively... Oil content was measured under the effects of feeding injury only, and loss averaged 1.8%...
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Catalogue: GRDC Updates
Integrated weed management - Crop topping in wheat.. Following work conducted in the Mid North which suggested crop topping can be carried out well before 32% moisture, we undertook this trial to look at the effect earlier crop topping has on wheat yield and quality in our area... Effect of crop topping with Roundup PowerMax on the yield and quality of Wyalkatchem wheat at Cummins in 2009...
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Catalogue: GRDC Updates (West)
" Agribusiness Crop Updates 2006 x Lexone 150 and 250 g/ha caused slight to moderate leaf burning/leaf scorching and biomass reduction (5-80%) across all the varieties... Increase in rate of Lexone from 150 to 250 g/ha resulted in increase in intensity of these symptoms... Crop Updates is a partnership between the Department of Agriculture, Western Australia and the Grains Research & Development Corporation 82 6 0 0 2 s e t a d p U p o r C s s e n i s u b i r g A l i0 j 1 1 0 8026 7 3 n48 6 4 55 7718 71 68651 ) 0 0 0 0010 0 0 a18 9 9 98 9999 99 87111 H 1 1 1 1111 1 1 T1 d. .We i a(l p p h s p /u l a gll4 ie 03004 62 4 34 7 25 H 1 s k 4 3 4 5 8 4 518 451 d 00110 00 1 01 0 10 ...
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Catalogue: GRDC Updates (West)
" Agribusiness Crop Updates 2006 x Lexone 150 and 250 g/ha caused slight to moderate leaf burning/leaf scorching and biomass reduction (5-80%) across all the varieties... Increase in rate of Lexone from 150 to 250 g/ha resulted in increase in intensity of these symptoms... Crop Updates is a partnership between the Department of Agriculture, Western Australia and the Grains Research & Development Corporation 82 6 0 0 2 s e t a d p U p o r C s s e n i s u b i r g A l i0 j 1 1 0 8026 7 3 n48 6 4 55 7718 71 68651 ) 0 0 0 0010 0 0 a18 9 9 98 9999 99 87111 H 1 1 1 1111 1 1 T1 d. .We i a(l p p h s p /u l a gll4 ie 03004 62 4 34 7 25 H 1 s k 4 3 4 5 8 4 518 451 d 00110 00 1 01 0 10 ...
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Catalogue: GRDC Final Reports
Prior to this study and contrary to the situation in wheat, the physiological basis of the relationship between plant height and grain yield was poorly understood in sorghum... Physiological determinants of plant growth such as biomass accumulation, partitioning between various plant organs, phenology, canopy dynamics, radiation and water use efficiencies and photosynthetic capacity were measured on an individual plant basis... As the present study was restricted to three genetic backgrounds and one major dwarfing gene, it is conceivable that assessments of other major dwarfing genes in different genetic backgrounds relevant to current breeding efforts may further improve an understanding of the relationship between plant height and grain yield and aid in the development of sorghum germplasm with increased yield potential...
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