Author Archives: Melina Miles

New aphid found in faba beans

megoura

Megoura crassicauda has been found in parts of north-east and central New South Wales (Sydney, Tamworth, and Breeza). The species originated in north-east Asia, and is closely related to the vetch aphid (Megoura viciae), found in Europe, Ethiopia and North America. Its host range is mostly limited to Vicia species – vetches, faba or broad beans, and may extend to… Read more »

Helicoverpa activity and management in chickpeas

chick blog nov2010

Helicoverpa are the primary insect pest of chickpeas. Beneficial insects that are present in many crops do not thrive in chickpeas, so successful helicoverpa management relies heavily on monitoring and identification, appropriately timing control to crop stage, and using the recommended thresholds. Monitoring involves regular in-field checking with a beat sheet. Additionally, moth numbers can be monitored using pheromone traps… Read more »

RWA as a pest in the northern grains region

Melina Miles   August 18, 2017   Comments Off on RWA as a pest in the northern grains region
Russian wheat aphid

Russian wheat aphid (RWA) is considered a high priority pest by the grains industry because of its potential to cause significant yield losses in wheat and barley if not well managed. Triticale and rye are also susceptible to crop loss, but oats are considered relatively tolerant. It is inevitable that RWA will establish in the northern grains region, but we… Read more »

Whitefly in establishing grain crops

Melina Miles   May 19, 2017   Comments Off on Whitefly in establishing grain crops
SLW_fababeans17_AngusBoileau_Moree

This summer silverleaf whitefly (SLW) populations have been extremely high in many cotton crops, particularly in NSW. As these crops are defoliated, large numbers of SLW are moving out of the cotton into surrounding vegetation, including emerging grain crops. Whilst the number of SLW adults landing in seedling canola, wheat, faba beans and cereals can look dramatic, previous experience has… Read more »

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 »

Making decisions about Rutherglen bug in maturing sorghum crops

Melina Miles   January 27, 2017   Comments Off on Making decisions about Rutherglen bug in maturing sorghum crops
Developing sorghum head showing signs of RGB damage; undeveloped seed, and spotting on developing seed.

Rutherglen bug (RGB) numbers are persisting in many sorghum crops as they start to reach physiological maturity. Queensland Department of Agriculture and Fisheries (DAF) research has shown no evidence of yield loss as a result of direct feeding on grain once it reaches physiological maturity (black layer). However, because most crops this year have staggered head emergence, there are a… Read more »

High Helicoverpa armigera (corn earworm) activity now being seen in winter cereals

Melina Miles   October 19, 2016   Comments Off on High Helicoverpa armigera (corn earworm) activity now being seen in winter cereals

Large flights of helicoverpa over the last 2 weeks (or longer in some districts) have seen significant eggs lays and larval populations in winter crops, including the winter cereals. It is not unusual to find both corn earworm and armyworm in cereal crops. Correct identification of the species present is very important as it influences damage potential and choice of… Read more »

Would you like to know whether you have resistant weeds on your farm?

Melina Miles   September 16, 2016   Comments Off on Would you like to know whether you have resistant weeds on your farm?

Over the next few months, you have the opportunity to have weed seed collection and resistance testing undertaken on your farm by the Queensland Department of Agriculture and Fisheries (DAF). The Grain Research and Development Corporation (GRDC) has contracted DAF to undertake the survey of weeds and herbicide resistance on grain-producing farms throughout Queensland.   The winter crop survey will… 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 »