Category Archives: aphids

Being prepared for Russian wheat aphid in the Northern grains region

Melina Miles   March 24, 2017   Comments Off on Being prepared for Russian wheat aphid in the Northern grains region

The spread of Russian wheat aphid (RWA) (Diuraphis noxia) in the Northern grains region is considered inevitable. When it might be detected in wheat and barley is less clear as the key drivers of its spread are not well understood in Australia. Wind is likely to play a part in moving winged aphids from south to north. The most northerly… Read more »

Are there Russian wheat aphid in your wheat or barley? A short guide to checking and identifying.

Melina Miles   July 27, 2016   Comments Off on Are there Russian wheat aphid in your wheat or barley? A short guide to checking and identifying.

Key points Conditions suitable for the usual cereal aphid species will also be suitable for RWA. Aphid populations typically build rapidly in late July and August.  Do not assume aphids in cereals are just the usual oat and corn aphid. In the event of a Russian wheat aphid (RWA) infestation, early detection in spring is critical to prevent yield loss…. Read more »

Update on Russian wheat aphid outbreak in South Australia.

Melina Miles   June 9, 2016   Comments Off on Update on Russian wheat aphid outbreak in South Australia.

The National Management Group (NMG), comprising all Australian governments, Grain Producers Australia and Plant Health Australia, met on 8 June 2016 to discuss the incursion of Russian wheat aphid (Diuraphis noxia) in South Australia. Acting on advice from the Consultative Committee on Emergency Plant Pests (CCEPP), the NMG agreed that it is not technically feasible to eradicate Russian wheat aphid… Read more »

Ladybirds enjoy a cotton aphid buffet

Jamie Hopkinson   June 6, 2016   Comments Off on Ladybirds enjoy a cotton aphid buffet

The minute two-spotted ladybird beetle (Diomus notescens) and the transverse ladybird beetle (Coccinella transversalis) are two natural enemies of cotton aphid (Aphid gossypii). They are commonly found in Australian crops, however relatively little is known about their biology. A series of laboratory experiments were conducted by the Queensland Department of Agriculture and Fisheries (DAF) to learn more about aspects of… Read more »

Industry alert – Russian wheat aphids found in South Australia

Melina Miles   June 3, 2016   Comments Off on Industry alert – Russian wheat aphids found in South Australia

The South Australian government are currently responding to detections of Russian wheat aphid (Diuraphis noxia), which was initially found on a property in Tarlee in South Australia on 13 May 2106. Since the first detection, Russian wheat aphid has been found on a further 22 properties within 1,400 square kilometres, and the number is expected to rise. Investigations are underway… Read more »

Pest Alert: Russian wheat aphid (Diuraphis noxia)

Melina Miles   June 3, 2016   Comments Off on Pest Alert: Russian wheat aphid (Diuraphis noxia)

Call Biosecurity Queensland on 13 25 23 if you see this pest Russian wheat aphid (Diuraphis noxia) has been found on over 1,400 square kilometres of land in the mid-north of South Australia. Russian wheat aphid is a major pest of cereal crops which injects toxins into the plant during feeding, retarding growth and killing the plant. Russian wheat aphid… Read more »

Overview of the green peach aphid and beet western yellows virus outbreak in southern Australia (2014)

Melina Miles   January 20, 2015   Comments Off on Overview of the green peach aphid and beet western yellows virus outbreak in southern Australia (2014)
green peach aphid

In the autumn and early winter of 2014, large areas of canola in South Australia, Victoria and southern NSW were heavily infested with green peach aphid (GPA), and many of the infested crops tested positive for beet western yellows virus (BWYV). GRDC TV  has compiled a series of three videos that discuss what factors contributed to the GPA outbreak, and… Read more »

Aphids, virus and leaf feeding caterpillars in faba beans.

Melina Miles   June 11, 2014   Comments Off on Aphids, virus and leaf feeding caterpillars in faba beans.

As the warm weather persists, insect activity is remaining high. DAFFQ Entomology has received numerous reports of aphids, and leaf-feeding caterpillars. The aphids have been identified as cowpea aphid and the caterpillars as one of the summer-active armyworm species, Spodoptera exigua (lesser armyworm). The concerns about these are for the potential for crop loss caused by direct feeding damage/defoliation or virus… Read more »

Spring pests of winter cereals

Melina Miles   August 30, 2013   Comments Off on Spring pests of winter cereals

Armyworm in barley and wheat. A number of reports of armyworm in crops have been received over the past couple of weeks. Numbers range from 30 to 50 per square metre (extreme) to a more typical 5 to10 larvae per square metre. Assessing larval density is done using a sweep net, bucket or beating a section of row into a… Read more »

Aphids in canola

Melina Miles   August 27, 2012   Comments Off on Aphids in canola

There are a number of canola crops in this season, and as the weather warms up the aphid numbers are building up in some of them. The aphids that colonise canola are most commonly the cabbage and the turnip aphid. There may also be a few green peach aphid present. The aphids colonise the terminal end of the flower spike… Read more »