Američki cvrčak (Scaphoideus titanus Ball.) jedini je poznati prirodni vektor zlatne žutice vinove loze. Hrani se sišući sokove iz floema vinove loze, pri čemu usvaja fitoplazmu (Flavescence dorée) koju unosi u svoj organizam i na taj način ju prenosi hranjenjem sa zaraženih na zdrave trsove. Za uspješno suzbijanje američkog cvrčka vrlo je bitno poznavati njegovu biologiju i ekologiju. Temeljem toga cilj ovog rada bio je istražiti prisutnost i utvrditi brojnost američkog cvrčka, te učinkovitost tretiranja. Istraživanje je postavljeno 2018. godine na lokalitetu Ilok. Pratila se dinamika pojave i utvrdila se brojnost ličinki i odraslih oblika američkog cvrčka u vinogradima na tri različite lokacije u Iloku. Dinamika pojave i brojnost pratila se uz pomoć žutih ljepljivih ploča. Istraživanje je pokazalo da je prosječan ulov po žutoj ploči bio 2, 5 ili 9 američkih cvrčaka, ovisno o lokalitetu. Učinkovitost tretiranja pokazala se najuspješnijom u vinogradu na lokaciji „Principovac“, u kojemu su korištena zaštitna sredstva različitih skupina prema mehanizmu djelovanja. U istraživanju nisu utvrđeni simptomi zlatne žutice vinove loze.; Leafhopper (Scaphoideus titanus) is the only known natural vector of golden grapevine yellow. It feeds by sucking juice from the grapevine, receiving Flavescence dorée, which enters into its own organism and thus it transmitting by feeding from infected to healthy stock. For successfully control of leafhopper, it is very important to know it's biology and ecology. Based on that the aim of this paper was to investigate the presence and determine the number of leafhoppers and treatments efficiency. The research was set up in 2018 at the Ilok site. The dynamics of the appearance and the number of larval and adult forms of leafhopper in vineyards were determined at three different locations. Dynamics of both elements was assessed by yellow adhesive plates. The study showed that the average catch per yellow adhesive plate was 2, 5 or 9 leafhoppers depending on the location. The most effective treatment was in the vineyard at the Principovac site, which included protective agents of different groups according to the mechanism of activity. In this study no symptoms of golden grapevine yellow were found.