Population ecology of leafhopper <i>Jacobiasca lybica</i> (Bergevin &amp; Zanon, 1922) (Hemiptera: Cicadellidae) and its control based on degree-days in Moulouya area of Morocco

The cotton leafhopper (Jacobiasca lybica) is one of the polyphagous species and its control mainly based on chemical treatments, however bio-ecological parameters are still poorly understood especially under Moroccan conditions. In this work, population ecology planning insecticide treatments recorded degree-days (DD) in a citrus orchard vineyard separated by windbreak (WB) Cypress Acacia were investigated. Leafhopper adults monitored with five yellow sticky traps for each experimental unit removed weekly from April to August identification counting. sampling indicated presence peaks adult flight during 2017 seven 2018. Whereas six generations predicted year according DD until mid-August. populations present WB plants throughout study period, preference over was observed. During 2018, insecticides used applied week after new plants, they also grapes at second, third, fourth fifth peaks. use predict outbreak discussed as promising strategy manage below economic thresholds.