Effect of surrounding landscape on Popillia japonica abundance and their spatial pattern within Wisconsin vineyards

Landscapes surrounding agroecosystems can provide resources that may benefit insect pests. This project examined the influence of landscape on abundance and spatial pattern Popillia japonica (Coleoptera: Scarabaeidae) in vineyards. Twenty vineyards across Southern Wisconsin, spanning a gradient 5-80% cropland 1.5km radius landscape, were sampled 2017 2018 for P. adults leaf injury. The distribution injury was assessed by sampling along transect at edge, halfway from edge to center, center each vineyard. proportion pasture with abiotic factors temperature, precipitation, longitude, pesticide use (determined using Environmental Impact Quotient) included models explain variation No significant relationship observed between or Combined effects pasture, temperature best explained while EIQ variability Vineyards more pastures located further east, higher temperatures, generally had east lower levels Additionally, weekly precipitation influenced abundance, temperatures less resulting greater adults. Significantly adult found edges than Our results suggest beetles likely contribute populations feeding vines vineyard edges, associated are geographical location, local weather conditions, use.