[By Chris Logan: ABC News Aug 20, 2009] Biosecurity Queensland is using satellite technology to monitor two noxious weeds in the state's west. Researchers are finding weeds through satellite images of sunlight reflecting from the earth. Study sites include Julia Creek, Winton and Longreach. Biosecurity Queensland spokesman Bruce Wilson says it has found prickly acacia in grasslands, but is having more trouble finding coral cactus and rubber vine. "That part of the project is very much developmental, it's about trying to see whether or not we can even detect those two weeds," he said. "They're going to be commonly found in amongst other vegetation and so potentially quite a challenge as to whether or not we can distinguish the weeds from the other vegetation."