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Catalogue: GRDC Updates
Dry weight response of crops to increasing P levels with and without mycorrhizal fungi in the soil... Unlike saprobic soil fungi, which colonise and break down organic matter and do not require a host plant in the system to complete their lifecycle, arbuscular mycorrhizal fungi (AMF), the type found in cropping systems, do require the presence of a host to reproduce and are called obligate symbionts... Having adequate populations of mycorrhizal fungi present in soils can be beneficial and in some cases essential for crop growth...
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Catalogue: GRDC Updates
Summer crops that are resistant to root-lesion nematodes can be used to reduce nematode populations... In an experiment in 2011 at Formartin, several varieties of summer crops were grown and P. thornei populations were assessed before planting and after harvest... Means of several varieties within each crop are presented...
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Catalogue: GRDC Final Reports
Blade, Kite, EGA Eagle Rock, and Sloop SA barley showed tolerance to metribuzin, exhibiting little change in seedling density and anthesis dry matter (DM) when treated with metribuzin (187.5 and 375 g/ha)... Estimates of regression parameter B (slope s.e.) for seedling density (plants/m2) and shoot DM (g/m2) of wheat genotypes treated with metribuzin (0, 187.5, and 375 g/ha) at a eld site at Cleve in 2004 Two-tailed t-tests were performed to compare differences in B (slope) values with Spear, a sensitive genotype... There is a need to identify alternative sources of metribuzin tolerance, which can be incorporated into Australian wheats...
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Catalogue: GRDC Updates
For Pratylenchus thornei , a moderately tolerant wheat variety (such as EGA Gregory) could return another 1.9t/ha compared to an intolerant wheat variety such as Petrie (or extra $450/ha with wheat valued at $239/t)... This year we'll present new information on the role of winter crops grown in rotation with wheat and details about the potential role of more resistant wheat in management of root-lesion nematodes... Our research has shown that nematicides will only reduce populations in the top soil layers...
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Catalogue: GRDC Updates (West)
Mention of a trade name or company in this publication does not imply endorsement of any product or company by the Department of Agriculture and Food, Western Australia... Overall, the production and supply of fertiliser accounted for a large proportion (35%) of the GHG produced from wheat production, and occurred in the pre-farm stage (Table 1)... Overall, constraints have a far smaller effect on heavy soils than on sand plain soils...
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Catalogue: GRDC Updates
On-going vigilance by testing soil for nematodes is essential when susceptible crops are planted... Populations of P. thornei after growing sorghum, sunflower and maize were similar to bare fallow (range of 2,900-4,500/kg soil at 0-15 cm (Figure 2)... Populations of P. thornei increased after growing soybean or mungbean compared to sunflower, sorghum, maize or clean fallow (Figure 2)...
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Catalogue: GRDC Updates
On-going vigilance by testing soil for nematodes is essential when susceptible crops are planted... Populations of P. thornei increased after growing mungbean or soybean compared to sunflower, sorghum, maize or clean fallow (Figure 2)... Overall, populations increased five times compared to before planting the summer crops, but remained below 250/kg soil (Figure 4)...
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