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Catalogue: GRDC Updates (North)
" Grains Research Update "Getting Ready for Summer" Orion Hall Wednesday 7th Nov 2001.. Farming systems which minimise the movement of soil and water will also minimise the loss of nutrients and pesticides... In summary, Mike has found a strategy to help him interpret his yield maps - and is now taking the same approach to other paddocks to maximise fertiliser savings...
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Catalogue: GRDC Updates (South)
" Grains Research Update "Getting Ready for Summer" Orion Hall Wednesday 7th Nov 2001.. Farming systems which minimise the movement of soil and water will also minimise the loss of nutrients and pesticides... In summary, Mike has found a strategy to help him interpret his yield maps - and is now taking the same approach to other paddocks to maximise fertiliser savings...
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Catalogue: Broadacre Field Crops DAFF QLD
The female Microplitis wasp uses her ovipositor to insert an egg into the caterpillar's body... Adult Microplitis wasp laying eggs into a Helicoverpa larva Photo: M Shepard.. Taking into account the caterpillars infected with ascovirus and Microplitis - shown as responsible for killing up to 75% of the second and third instar Helicoverpa caterpillars in these unsprayed cotton crops - a significant contribution to the control of Helicoverpa ...
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Catalogue: Broadacre Field Crops DAFF QLD
The female Microplitis wasp uses her ovipositor to insert an egg into the caterpillar's body... Adult Microplitis wasp laying eggs into a Helicoverpa larva Photo: M Shepard.. Taking into account the caterpillars infected with ascovirus and Microplitis - shown as responsible for killing up to 75% of the second and third instar Helicoverpa caterpillars in these unsprayed cotton crops - a significant contribution to the control of Helicoverpa ...
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Catalogue: Broadacre Field Crops DAFF QLD
As a general rule, Microplitis has greater impact on near-threshold Helicoverpa populations than against populations in excess of the economic spray threshold for that crop... Microplitis is active in all crops attacked by Helicoverpa , except chickpea because the plant s acid secretions deter predators and parasitoids... In early spring, even low numbers of Microplitis can parasitise a significant proportion of the Helicoverpa population because the Helicoverpa numbers are also low (e.g. in spring mungbeans, sun#owers and sorghum)...
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Catalogue: Broadacre Field Crops DAFF QLD
As a general rule, Microplitis has greater impact on near-threshold Helicoverpa populations than against populations in excess of the economic spray threshold for that crop... Microplitis is active in all crops attacked by Helicoverpa , except chickpea because the plant s acid secretions deter predators and parasitoids... In early spring, even low numbers of Microplitis can parasitise a significant proportion of the Helicoverpa population because the Helicoverpa numbers are also low (e.g. in spring mungbeans, sun#owers and sorghum)...
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Catalogue: Broadacre Field Crops DAFF QLD
Image showing an NPV infected helicoverpa larve that has ruptured.. Maize: NPV will not control larvae sheltering in maize cobs but should give good control in silking maize if applied via a ground rig fitted with droppers targeted at the cob and silk area of the plant... Viral infection is much more complex, and resistance to NPV is much harder to develop...
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Catalogue: Broadacre Field Crops DAFF QLD
Image showing an NPV infected helicoverpa larve that has ruptured.. Maize: NPV will not control larvae sheltering in maize cobs but should give good control in silking maize if applied via a ground rig fitted with droppers targeted at the cob and silk area of the plant... Viral infection is much more complex, and resistance to NPV is much harder to develop...
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Catalogue: Broadacre Field Crops DAFF QLD
Image showing an NPV infected helicoverpa larve that has ruptured.. Maize: NPV will not control larvae sheltering in maize cobs but should give good control in silking maize if applied via a ground rig fitted with droppers targeted at the cob and silk area of the plant... Viral infection is much more complex, and resistance to NPV is much harder to develop...
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Catalogue: GRDC Updates (North)
Soil coring reveals to the farmer a fuller picture of the plant's exploration of its soil environment, a useful tool in crop management... Whilst measurement of parameters such as salt and sodicity, and knowing the physical condition of the soil, provide a guide to potential soil constraints, it is the plant that integrates all of the conditions it encounters and responds ... The shallow nutrients are regularly detected in the soil analyses of the standard (0-10cm) soil sample, but are often not available for plant uptake for long periods during the growing season...
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