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Resistance to neonicotinoids found in Australian crops

Control of a common aphid found in grain and horticulture crops will be more difficult after it was found to be resistant to a fourth type of chemical control.

The green peach aphid was recently found resistant to neonicotinoid insecticides for the first time in Australia.

GPA caused widespread destruction of canola crops in 2014 by transmitting Beet Western Yellows Virus and is also a common pest in horticulture.

The Melbourne-based scientific research organisation cesar, in collaboration with researchers at CSIRO, discovered the resistance to neonicotinoid insecticides — commonly used in seed treatments in the grains industry.

The discovery means that GPA is known to have resistance to four different chemical modes of action groups — synthetic pyrethroids, carbamates, organophosphates and now, neonicotinoids.

Cesar entomologist Paul Umina said GPA specimens taken from canola and vegetable crops across Australia tested positive for resistance to neonicotinoids.

Read more at The Weekly Times
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