“…Further, these insect species are responsible in transmitting the pathogens that causing several plant diseases (Nielson, 1968, Maramorosch, 1969, Harris and Maramorosch, 1977, and Hegab, 1980. Several studies surveyed these insects in many fields of vegetable crops and fruit trees in Egypt (Ammar and Farrag, 1976;EL-Nahal et al, 1977;Aboul Atta, 1983;Hegab et al, 1989a, b;Helal et al, 1996;Hegab, 2001;El-Khawas et al, 2004;Awadalla et al, 2011Awadalla et al, , 2013Awadalla et al, , 2014Awadalla et al, and 2019Shalaby et al, 2012). However, this work aims to survey the major piercingsucking insect species that inhibiting maize crop, to examine the influence of potassium fertilization on such insect species, and to estimate the effect of chemical constituents on the population density of aphid, leafhopper and planthopper insects.…”