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Catalogue: GRDC Publications
A positive test result confirms the need for alternative tactics or herbicides... Assessing weed population density The most accurate way to estimate the population of a weed in a paddock is to count the number of plants in an area of known size at a number of locations... Estimating potential weed population density Potential weed population density can be estimated in a number of ways, such as: When weeds are setting seed, count the number of seed-heads or pods, and the number of seeds per pod or seed-head, from a given sample area...
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Catalogue: GRDC Media
Tests will confirm species and population levels of these microscopic endoparasites and help the Department of Agriculture and Food WA (DAFWA) characterise distribution and gather resistance information for crops and varieties grown in WA... The research, jointly funded by GRDC and DAFWA, is vital because yield loss can occur without careful planning in crop variety selection and no chemicals are currently available to economically control RLN in broadacre cropping systems... Using resistant varieties of a crop to inhibit nematode reproduction...
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Catalogue: GRDC Updates (West)
KEYMESSAGES Inoculating pasture legumes must be an ongoing process... The efficiencies of the products were continually evaluated for use in Western Australian agriculture by research at the Centre for Rhizobium Studies... Measurements included the percentage of plants nodulated, the amount of nodules on each plant and the strain of bacteria in each nodule, which was identified by fingerprint profiling using polymerase chain reaction (PCR) as described in Yates (2005)...
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Catalogue: Broadacre Field Crops DAFF QLD
Photograph showing black streaks on leaf petioles - Symptoms of tobacco streak virus (TSV) on sunflower.. Photograph showing pith discolouration due to rotting - Symptoms of tobacco streak virus (TSV) on sunflower.. Photograph showing deformed growing point, shortened internodes and yellow blotches on leaves - Symptoms of tobacco streak virus (TSV) on sunflower..
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Catalogue: Broadacre Field Crops DAFF QLD
Photograph showing black streaks on leaf petioles - Symptoms of tobacco streak virus (TSV) on sunflower.. Photograph showing pith discolouration due to rotting - Symptoms of tobacco streak virus (TSV) on sunflower.. Photograph showing deformed growing point, shortened internodes and yellow blotches on leaves - Symptoms of tobacco streak virus (TSV) on sunflower..
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Catalogue: Broadacre Field Crops DAFF QLD
Photograph showing black streaks on leaf petioles - Symptoms of tobacco streak virus (TSV) on sunflower.. Photograph showing pith discolouration due to rotting - Symptoms of tobacco streak virus (TSV) on sunflower.. Photograph showing deformed growing point, shortened internodes and yellow blotches on leaves - Symptoms of tobacco streak virus (TSV) on sunflower..
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Catalogue: GRDC Media
Tests will confirm species and population levels of these microscopic endoparasites and help the Department of Agriculture and Food WA (DAFWA) characterise distribution and gather resistance information for crops and varieties grown in WA... The research, jointly funded by GRDC and DAFWA, is vital because yield loss can occur without careful planning in crop variety selection and no chemicals are currently available to economically control RLN in broadacre cropping systems... Using resistant varieties of a crop to inhibit nematode reproduction...
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Catalogue: GRDC Publications
The guide will help you identify the common root and crown diseases that cause damage to cereal crops across.. Some of the diseases can be initially identified from paddock symptoms whilst others require a more careful inspection of the roots or lower stems of infected plants... Where resistance is not available, control is achieved through rotations with non-host crops, adjusting time of sowing in relation to the break of the season and weed kill, improved tillage techniques and by ensuring that adequate nutrition is available to help the plants recover...
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