Considerations when using pyriproxyfen on silverleaf whitefly

Jamie Hopkinson   January 10, 2017   Comments Off on 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

Paul Grundy   December 22, 2016   Comments Off on 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?

Paul Grundy   December 15, 2016   Comments Off on I think I may have solenopsis mealybug in my cotton – what do I do?
A solenopsis colony

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

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 »

Helicoverpa activity and pheromone trap catches to 16 September 2016

Richard Lloyd   September 21, 2016   Comments Off on 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?

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 »

Phytoplasma and virus problems in soybean and mungbean crops

Murray Sharman   September 6, 2016   Comments Off on Phytoplasma and virus problems in soybean and mungbean crops

A devastating disease was observed in several paddocks of soybean crops in the Branchview area of the Darling Downs in late autumn 2016. Almost 100 percent of plants were affected in some paddocks. The affected plants produced no, or very few filled pods and instead had a proliferation of tiny immature pods as shown in Photos 1 and 2. The plants… Read more »

Seeking out storage pests

Greg Daglish   August 26, 2016   Comments Off on Seeking out storage pests

Determining stored pest status in a silo full of grain can be a bit like finding the proverbial needle in a haystack, but a pilot study by the Queensland Department of Agriculture and Fisheries on two farms in Southern Queensland indicated that a combination of sampling methods may provide a more accurate picture of pest species present. Increasing on-farm storage… 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 »

Don’t let lucerne crown borer overwinter in your soybean stubble

Hugh Brier   July 22, 2016   Comments Off on Don’t let lucerne crown borer overwinter in your soybean stubble

Once again, lucerne crown borer (LCB) (Zygrita diva) has been active in soybeans this season. Worst affected regions were the Northern Rivers and the Liverpool Plains in NSW, but reports were also fielded from the Bundaberg, Fassifern and Darling Downs regions in Queensland. In some of the severely affected crops, over 80% of plants were infested, and up to 70%… Read more »