Aphids to rouse as weather heats up

Russian wheat aphid numbers have been low across the state but as the warmer weather approaches farmers are being asked to report any discoveries.
Russian wheat aphid numbers have been low across the state but as the warmer weather approaches farmers are being asked to report any discoveries.

A dry year has kept the number of Russian wheat aphids to a minimum according to the latest South Australian Research and Development Institute pest report.

Through constant monitoring by the organisation sample grasses have not been showing signs of the aphid at this time.

Current activity has been only been found where volunteer cereals and grasses have survived, such as near irrigated cropping in Loxton.

SARDI is warning growers that aphid migration would increase in warmer spring weather but it is reported that crops older than growth stage (GS) 40 did not appear to be attractive to the pest so colonisation was unlikely.

Host crops include more than 140 species of plants such as wheat, barley, triticale, rye, oats, pasture grasses and wild genera.

If you find aphids or symptoms of their presence you can send an SMS or email with a smart phone photo with date and location and details of plant type to Maarten van Helden at maarten.vanhelden@sa.gov.au or 0481 544 429.