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 »

Soybean moth active again in 2017 in coastal Queensland

Major soybean moth outbreaks have recently been reported in some coastal Burnett soybean crops, and lesser outbreaks in crops in the Burdekin. Soybean moth is generally a minor soybean pest but major outbreaks have been reported periodically in all soybean growing regions. In extreme cases, crops can be totally defoliated. Feeding damage Larvae feed mostly within the leaves, making distinctive… Read more »

Phytoplasma resurfaces in the summer of 2016/17

Phytoplasma (a specialised bacteria infecting plants) has been widely reported in spring-planted mungbeans from Central Queensland to North Western NSW (Moree and Narrabri) and all areas in between. Symptoms include masses of small deformed leaves, flowers and pods, plants remaining green at harvest, and possibly an increased incidence of puffy pod. While in previous recent summers, moderate to high levels… Read more »

Making decisions about Rutherglen bug in maturing sorghum crops

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 »

Considerations when using pyriproxyfen on silverleaf whitefly

With the current season shaping up to be one of high insect pressure, we may see silverleaf whitefly (SLW), Bemisia tabaci reach problematic levels in regions outside of their traditional range. For growers and agronomists not familiar with their control it is worth investing some time to understand how one of the main registered insecticides, pyriproxyfen, works. What is pyriproxyfen?… Read more »

A new pigeon pea variety for Bollgard 3 refuges

image of flowering pigeon pea suitable for cotton refuges

Pigeon peas represent about 80% of the refuges cultivated to offset Bollgard cotton in Australia due to the land area use efficiency of this option. However, over the years, varietal mixing and continual recycling of seed from undamaged refuges has resulted in peas that flower later in the season, increasingly lacking synchrony with Bollgard’s boll setting period, thus reducing the… Read more »

I think I may have solenopsis mealybug in my cotton – what do I do?

Solenopsis mealybug can be found throughout Queensland’s cropping areas and has also been confirmed in Western Australia, the Northern Territory and Victoria. Whilst solenopsis has not yet been confirmed in NSW cotton crops it would be reasonable to assume that it is likely to be present in the broader landscape and it is only a matter of time before it… Read more »

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 »

Helicoverpa activity and pheromone trap catches to 16 September 2016

Helicoverpa punctigera numbers in pheromone traps look to be on the increase through September. The continued migration of H. punctigera through spring is likely, if suitable weather systems occur, and it is likely that all susceptible crops (chickpea, canola, faba beans, spring mungbeans, spring sunflowers) will experience helicoverpa pressure through October and November. Peter Gregg and Alice Del Socorro (University… Read more »

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 »