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seed test

Catalogue: GRDC Updates
Spray failures due to herbicide resistant weeds is increasing rapidly in most cropping regions... Every time a herbicide from the same mode of action group is used on a weed population, the selection pressure for resistance to that herbicide and to other herbicides with that same mode of action is increased... As resistance in a population is usually selected from a small number of individuals that have the resistance gene, the early stages of resistance often appear as small patches of weeds surviving a spray...
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Catalogue: GRDC Final Reports
A reliable, accurate and sensitive RT-PCR test for detecting Wheat streak mosaic virus (WSMV) in bulk samples of wheat seed was successfully developed, validated in blind studies and made available to the agricultural industry through AGWEST Plant laboratories for use in testing seed stocks... The three main ways to combat WSMV are to 1) destroy the green bridge before sowing to prevent transmission of the virus by the WCM, 2) use wheat seed stocks that have either none or only low levels of the virus, and 3) to sow crops late when temperature conditions are non-conducive for WCM... In an early seed transmission experiment, WSMV was detected by RT-PCR in seedlings nine days after sowing and the number of positive seedlings increased considerably over the following six weeks until almost all batches tested positive...
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Catalogue: GRDC Final Reports
Use of the test may also help to prevent wheat breeders sowing infected seed stocks... Use of the test confirmed widespread occurrence of WSMV in the WA grainbelt and identified the disease for the first time in Tasmania... The research also showed that Australian WSMV isolates represent a single incursion from overseas and the virus has been present in Australia for at least 15 years...
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seed (2)
seed test (3)
wheat (2)
wsmv (2)