Category Archives: Crops

Premature browning in soybeans—keep an eye out for webbers and miners

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As we enter the business end of the season, we want our soybean crop’s leaves to be a healthy green, as the healthier the leaves, the more the pods fill and the higher the yield. In a drought year, dryland crops turn brown prematurely due to lack of water, but in wet years or in irrigated crops, leaves should not… Read more »

Detecting FAW in sorghum and corn

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Fall armyworm (FAW) are still active across the Northern Grains Region, but inland Central and Southern Queensland have not experienced continuous population build up in crops since the first immigration of moths in September–October. One of the major contributors to this continuing low pressure is probably the very high natural enemy (beneficial) impact on FAW. A number of very common… Read more »

Serpentine leafminer – another exotic leaf-mining fly now in Australia

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Another exotic leaf-mining fly, the serpentine leafminer (SLM; Liriomyza huidobrensis), also known as pea leafminer or South American leafminer, has recently been found in commercial vegetable crops (celery and green beans) in the Fassifern Valley (90 km south-west of Brisbane). This follows its previous detection in western Sydney in early November. The national plant pest and disease incursions technical committee… Read more »

Helicoverpa in wheat – does it warrant control?

Helicoverpa outbreaks in wheat are relatively rare events. The last big outbreak, in 2016, was the first significant event for several decades, so treating helicoverpa in wheat is not something that many agronomists are familiar with. However, 2020 looks to be a year when helicoverpa infestations in some crops may warrant control. Wet winters are well correlated with outbreaks of… Read more »

Termites in cereal crops—a rare occurrence—but it is 2020….

Termites are common in undisturbed parts of the landscape, playing an important role in the ecosystem. It is unusual to find them in crops—but in 2020, there have been several reports of termites in winter cereals. The first reports were received during crop establishment, and more were received once the crops started to come out in head and set grain…. Read more »

Tobacco streak virus strikes again in mungbean crops in Central Queensland: how to avoid future risks

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Key points: There was a resurgence in tobacco streak virus (TSV) disease in mungbeans in early 2020 TSV is restricted to central QLD and closely related to the distribution of parthenium weed Growers are encouraged to avoid areas of dense parthenium to reduce risk In autumn of 2020, tobacco streak virus (TSV) was found to be common in all mungbean… Read more »

Faba bean aphid is back in our faba bean crops this winter

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Faba bean aphid (FBA, Megoura crassicauda) was first noted in Australia on broad beans (Vicia faba L. cv. Coles Early Dwarf) in October 2016 in a Sydney suburb, (Hales et al., 2017). FBA was then recorded in September 2017 at two faba bean trial sites: NSW DPI Tamworth Agricultural Institute (TAI) and Liverpool Plains Field Station Breeza (LPFS Breeza). These… Read more »

Not all caterpillars in maize are fall armyworm

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Recent reports were received of decidedly non-armyworm looking caterpillars attacking corn cobs in a crop near Mundubbera. The larvae in question were pale with lines of large dark spots on their back, and looked very similar to a serious mungbean pest, beanpodborer (Maruca vitrata). However, the larvae in question were slightly larger (about 20 mm) and some had a slight… Read more »

Other summer pulse observations

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As the summer cropping season winds down, there are some key observations in pulse crops made by leading consultants from New South Wales’s Northern Rivers and Queensland’s Hervey Bay regions that haven’t been covered in recent Beatsheet articles. 1: Indoxacarb failures linked to poor coverage The high Helicoverpa pressure encountered this summer resulted in many indoxacarb (e.g. Steward®) sprays being… Read more »

How soybeans are classified on spray labels

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With a range of pest outbreaks recently (including fall armyworm), and the issuing of several new permits in Australia, there has been some confusion as to whether pulse crop references on spray labels and permits in Australia include soybeans. The good news is that the answer is yes it certainly does! Soybeans are listed by the APVMA under Crop Group… Read more »