Commercial vegetable producers and backyard growers are urged to check for signs of the tomato potato psyllid, and report any unusual detections using DAFWA's MyPestGuide Reporter app. Check for the tomato potato pysllid on the underside of leaves. The more mature adults are darker in colour. Nymphs are 2mm long, oval shaped, flattened and scale-like in appearance. Psyllid eggs are less than 1mm long and are white when first laid, then turn yellow to orange after a few hours.