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helicoverpa armigera

Catalogue: Broadacre Field Crops DAFF QLD
Photograph showing a row of Helicoverpa coloured larvae in lucerne.. Crop damage by H. armigera is most common during the later part of the summer season... The basic principles of the strategy involve a yearly cycle of management practices, which includes tactics that aim to reduce: the population of overwintering Helicoverpa pupae (March-June) the early season build-up of Helicoverpa on a regional/district scale (July-November) the mid-season population pressure on Helicoverpa- sensitive crops (December-March)...
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Catalogue: Broadacre Field Crops DAFF QLD
Photograph showing a row of Helicoverpa coloured larvae in lucerne.. Crop damage by H. armigera is most common during the later part of the summer season... The basic principles of the strategy involve a yearly cycle of management practices, which includes tactics that aim to reduce: the population of overwintering Helicoverpa pupae (March-June) the early season build-up of Helicoverpa on a regional/district scale (July-November) the mid-season population pressure on Helicoverpa- sensitive crops (December-March)...
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Catalogue: Broadacre Field Crops DAFF QLD
Photograph showing a row of Helicoverpa coloured larvae in lucerne.. Crop damage by H. armigera is most common during the later part of the summer season... The basic principles of the strategy involve a yearly cycle of management practices, which includes tactics that aim to reduce: the population of overwintering Helicoverpa pupae (March-June) the early season build-up of Helicoverpa on a regional/district scale (July-November) the mid-season population pressure on Helicoverpa- sensitive crops (December-March)...
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Catalogue: Broadacre Field Crops DAFF QLD
The name Helicoverpa refers to two species of moth: Helicoverpa punctigera and H. armigera , the corn earworm... The likely magnitude of these influxes of H. punctigera can be estimated by monitoring the breeding areas in inland Australia... The computer model uses current local temperatures to calculate the rate of development of pupae in the soil, and predicts the timing of emergence of moths...
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Catalogue: Broadacre Field Crops DAFF QLD
The name Helicoverpa refers to two species of moth: Helicoverpa punctigera and H. armigera , the corn earworm... The likely magnitude of these influxes of H. punctigera can be estimated by monitoring the breeding areas in inland Australia... The computer model uses current local temperatures to calculate the rate of development of pupae in the soil, and predicts the timing of emergence of moths...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Overwintering pupae describes the winter dormant stage of the helicoverpa pupae... Control of overwintering pupae is achieved through pupae busting - cultivating the soil to a depth of 5-10 cm to reduce survival of pupae... To determine pupal numbers, crops can be sampled prior to harvest by: randomly selecting metre lengths of row searching for emergence tunnels by carefully scraping the top 2-3 cm of soil away with a garden trowel (Emergence tunnels will appear as a small circular hole slightly larger in diameter than a pencil.) digging down carefully into a tunnel to about 10 cm to find the pupa...
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Catalogue: Broadacre Field Crops DAFF QLD
Overwintering pupae describes the winter dormant stage of the helicoverpa pupae... Control of overwintering pupae is achieved through pupae busting - cultivating the soil to a depth of 5-10 cm to reduce survival of pupae... To determine pupal numbers, crops can be sampled prior to harvest by: randomly selecting metre lengths of row searching for emergence tunnels by carefully scraping the top 2-3 cm of soil away with a garden trowel (Emergence tunnels will appear as a small circular hole slightly larger in diameter than a pencil.) digging down carefully into a tunnel to about 10 cm to find the pupa...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Overwintering pupae describes the winter dormant stage of the helicoverpa pupae... Control of overwintering pupae is achieved through pupae busting - cultivating the soil to a depth of 5-10 cm to reduce survival of pupae... To determine pupal numbers, crops can be sampled prior to harvest by: randomly selecting metre lengths of row searching for emergence tunnels by carefully scraping the top 2-3 cm of soil away with a garden trowel (Emergence tunnels will appear as a small circular hole slightly larger in diameter than a pencil.) digging down carefully into a tunnel to about 10 cm to find the pupa...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
The name Helicoverpa refers to two species of moth, the larvae of which attack field crops in the northern grains region of Australia... Helicoverpa armigera is generally regarded as the more serious pest because of its greater capacity to develop resistance to insecticides, its broader host range, and the fact that it persists in cropping areas from year to year, whereas H. punctigera numbers fluctuate from year to year based on conditions in its inland breeding areas... Helicoverpa armigera attacks all crops but is less common in wheat and barley...
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Catalogue: Broadacre Field Crops DAFF QLD
The name Helicoverpa refers to two species of moth, the larvae of which attack field crops in the northern grains region of Australia... Helicoverpa armigera is generally regarded as the more serious pest because of its greater capacity to develop resistance to insecticides, its broader host range, and the fact that it persists in cropping areas from year to year, whereas H. punctigera numbers fluctuate from year to year based on conditions in its inland breeding areas... Helicoverpa armigera attacks all crops but is less common in wheat and barley...
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