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turnip aphid

Catalogue: Broadacre Field Crops DAFF QLD
Adults and nymphs form dense colonies which appear bluish-grey and are covered with a fine, whitish powder... Nymphs are greenish and adults are a dull or greyish-green... Adults and nymphs suck on sap and high numbers can result in reduced pod set, pod fill and grain quality...
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Catalogue: Broadacre Field Crops DAFF QLD
Adults and nymphs form dense colonies which appear bluish-grey and are covered with a fine, whitish powder... Nymphs are greenish and adults are a dull or greyish-green... Adults and nymphs suck on sap and high numbers can result in reduced pod set, pod fill and grain quality...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Adults and nymphs form dense colonies which appear bluish-grey and are covered with a fine, whitish powder... Nymphs are greenish and adults are a dull or greyish-green... Adults and nymphs suck on sap and high numbers can result in reduced pod set, pod fill and grain quality...
Related categories:
Catalogue: GRDC Media
Research shows cabbage aphids living on the edge.. "The new research clearly suggests that infestation of racemes occurs later in the growing season, and that in the weeks prior, the same canola plants host cabbage aphids feeding on leaves in the bottom of the canopy," Mr Severtson said... Mr Severtson said that in some years, cabbage aphids and other species such as turnip aphids could cause widespread damage in late winter and spring by feeding on growing canola shoot tips, causing wilting, flower abortion and reduced pod set...
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Catalogue: Broadacre Field Crops DAFF QLD
Adults and nymphs form dense colonies... Adults are 3 mm long and may have wings... Adults and nymphs suck on sap and high numbers can result in reduced pod set, pod fill and grain quality...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Adults and nymphs form dense colonies... Adults are 3 mm long and may have wings... Adults and nymphs suck on sap and high numbers can result in reduced pod set, pod fill and grain quality...
Related categories:
Catalogue: Broadacre Field Crops DAFF QLD
Adults and nymphs form dense colonies... Adults are 3 mm long and may have wings... Adults and nymphs suck on sap and high numbers can result in reduced pod set, pod fill and grain quality...
Related categories:
Catalogue: GRDC Media
Time to tame the green bridge and keep insect pests at bay.. "If aphids are found in very low numbers on only a few plants in the crop, we advise treatment should not be immediately undertaken, but instead further regular monitoring conducted to assess whether the aphid numbers increase to a level that warrants spraying... Mr Kimber said a range of beneficials including ladybird beetles, hoverflies and Braconid wasps that parasitise aphids have been observed during March in close proximity to volunteer canola heavily infested with cabbage aphids...
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Catalogue: GRDC Media
Research shows cabbage aphids living on the edge.. "The new research clearly suggests that infestation of racemes occurs later in the growing season, and that in the weeks prior, the same canola plants host cabbage aphids feeding on leaves in the bottom of the canopy," Mr Severtson said... Mr Severtson said that in some years, cabbage aphids and other species such as turnip aphids could cause widespread damage in late winter and spring by feeding on growing canola shoot tips, causing wilting, flower abortion and reduced pod set...
Related categories:
Catalogue: GRDC Media
Canola virus test results help to map extent of infection.. The Victorian Department of Environment and Primary Industries (DEPI) testing laboratory has tested thousands of plants and results to date have provided a clear picture of where infection has occurred... Check for the build-up of numbers and the production of significant numbers of winged aphids in a population, which signals that flights may be about to occur," said Dr Umina, who is leading GRDC-funded research into insecticide resistance in GPA...
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