Corn earworm chews into sorghum profits

      2 Comments on Corn earworm chews into sorghum profits

Sorghum growers across the Darling Downs can expect to see an influx of the corn earworm, Helicoverpa armigera, in their flowering sorghum crops over the next few weeks. Growers are well equipped to deal with the problem in an environmentally friendly way. Moths are active and wanting to lay eggs on susceptible crops, and sorghum crops putting up heads are… Read more »

Rutherglen bugs are everywhere!

      Comments Off on Rutherglen bugs are everywhere!

Rutherglen bug (Nysius vinitor)(RGB) is one of the insect species that arrives in crops in spring in large numbers, usually in association with storm activity. You may also have seen them on your windows and screens (and around the lights) at home in recent days. It is likely that the bugs are moving around in the environment, perhaps even transported… Read more »

No concern for tell-tale holes

      Comments Off on No concern for tell-tale holes

Corn earworm larvae on vegetative sorghum crops produce characteristic holes in the leaves after feeding in the throat of the plant. These tell-tale signs are of no great concern as this type of feeding will not affect crop yield. Caption: BEB alias Austin McLennan showing a characteristic holey sorghum leaf. The recent presence of high numbers of corn earworm, Helicoverpa… Read more »

Can you confidently identify armyworm and helicoverpa larvae in winter cereals?

      Comments Off on Can you confidently identify armyworm and helicoverpa larvae in winter cereals?

Both Helicoverpa armigera and armyworm larvae are occurring together in wheat and barley. It is important to be able to separate the helicoverpa larvae from the armyworm larvae in order to determine whether the numbers are above or below threshold, and, if needed, to make the most appropriate decision about control options. Armyworm larvae have three white stripes on the… Read more »

Control considerations for Helicoverpa in chickpea

      Comments Off on Control considerations for Helicoverpa in chickpea

The recently released brochure outlining how to calculate an economic threshold for helicoverpa in chickpea is available on the DPI & F website at www.dpi.qld.gov.au/fieldcrops. Click on the link to Helicoverpa management in chickpea where you can view or download the brochure. Control considerations – which product when? There is a range of products registered for helicoverpa control in chickpea…. Read more »

Are corn earworm a problem in winter cereals?

Corn earworm, Helicoverpa armigera, are frequently found in winter cereals but usually numbers are too low to warrant control. Occasionally, however, corn earworm numbers may be sufficient to cause economic damage. The high value of today’s grain is further reason to carefully check for grub infestations. It is not unusual to find both corn earworm and armyworm in cereal crops…. Read more »

WATCH FOR ARMYWORMS IN BARLEY AND OATS

      Comments Off on WATCH FOR ARMYWORMS IN BARLEY AND OATS

With the current high value of barley, growers should closely monitor armyworm infestations as crops approach maturity. Armyworms are important pests in southern Queensland where they attack winter cereals, particularly barley and oats, in September and October. Larvae appear in plague proportions in some years, and are patchy in others. Head cutting by large larvae can lead to serious losses… Read more »

Cereal Aphid Update

      2 Comments on Cereal Aphid Update

Making decisions about control of Cereal Aphids This post is an update on cereal aphid management following a number of enquiries from growers and agronomists over the last week or so. Which species in crops? There are two species of aphid you are most likely to encounter in winter cereals (oats, wheat and barley). They are the oat aphid (Rhopalosiphum… Read more »

Are aphids sucking away cereal profits?

      Comments Off on Are aphids sucking away cereal profits?

Aphid control decisions tend to be more problematic in moisture stressed winter cereal crops, since in a well supplied crop the level of moisture extracted from the crop by aphids is of little concern. However, in dry times every drop seems precious. Had we not received the recent rain over the last few days throughout southern Queensland and northern NSW… Read more »

St George growers meet to discuss area-wide SLW management

      Comments Off on St George growers meet to discuss area-wide SLW management

On Friday August 10, St George growers and agronomists met to discuss strategies to manage the Silverleaf whitefly population in the irrigation area. Over the past two seasons, a number of cotton fields in St George have been treated for SLW. Last year more fields were treated earlier, and required a second treatment. It is clear that SLW is now… Read more »