New invasive species of aphids (Hemiptera, Aphididae) in Serbia and Montenegro
Three new invasive species of aphids have been found in Serbia: Chaitophorus populifolli Essig, Myzocallis walshii (Monell) and Trichosiphonaphis polygonifoliae (Shinji) and two have been found in Montenegro: Aphis illinoisensis Shimer and Tinocallis kahawaluokalani (Kirkaldy).A.illinoisensis is a pest of the Pillows grapevine, T.polygonifoliae, fe