Seasonal occurrence of empoasca sp. (Hemiptera: Cicadellidae) in eggplant crop in the region of Ilha Solteira – SP

Abstract

The study aimed to characterize the seasonal population dynamics and vertical distribution of Empoasca sp. (Hemiptera: Cicadellidae) in eggplant (Solanum melongena L.) cultivation in the region of Ilha Solteira – SP, conducted at the Teaching, Research and Extension Farm – Pomar, of São Paulo State University (UNESP). A total of 180 seedlings of the cultivar ‘Napoli’ were produced and transplanted 30 days after emergence. Weekly samplings began at 33 days after transplanting (DAT). Adult density was estimated by direct visual inspection using vertical canopy stratification (upper, middle, and lower thirds), while nymphs were quantified in the laboratory under a stereomicroscope. A heterogeneous vertical distribution pattern was observed, with population predominance in the upper third (0.20 adults/leaf and 0.15 nymphs/leaf), followed by the middle and lower thirds. Population peaks occurred between 75 and 148 DAT, associated with higher average temperatures and increased relative humidity, which favored pest development and survival. It was concluded that Empoasca sp. exhibits defined seasonality and preference for young foliar tissues, providing technical support for monitoring and Integrated Pest Management (IPM) strategies in eggplant cultivation.