Abiotic factors that significantly influence catch of Scaphytopius magdalensis on sticky traps were identified for each leafhopper generation in North Carolina. Regression models were generated to describe these relationships and the models were validated on similar data from nearby sites.
Models generated by 1600 hr. meteorological observations and driven by the mean trap catch for the 1-week study period, exhibit the lowest variation with respect to the mean of the actual trap catch numbers. In all 3 generations, soil temperature at 7.6 cm depth is highly significant and positively correlated with leafhopper trap catch. Air temperature at 7.6 cm height and soil temperature at 2.5 cm depth are also positively correlated to trap catch, but these are significant only in the first generation. In the second generation relative humidity is highly significant; it exhibits a slight negative correlation when considered alone and a positive correlation when analyzed in conjunction with soil temperature (7.6 cm). Air temperature (7.6 cm) shows a significant negative correlation with trap catch in the third generation. In several cases, validation models exhibit more variation than that present from the observed trap catch numbers, which may be due to low leafhopper densities in the validation study sites.