Protocolo de recuento reducido para cinco tama？os diferentes de trampas adhesivas amarillas utilizadas en el monitoreo de Frankliniella occidentalis (Pergande)

one of the reasons for the reduced use of sticky traps by growers is that counting takes a considerable amount of effort and time, which increases with as trap size. we examined the influence of higher trap sizes, in order to apply a method of reduced counting, named least surface counting. sticky yellow traps of five different sizes were placed in pepper greenhouses (n=10). counting was performed on the whole trap and six different designs of reduced counting. a paired t-test was performed on differences between trap faces. since meaningful differences were obtained in 96% of tests, each face was considered as independent, doubling the number of data sets. then, a paired t-test was performed to test the difference between counts/cm2 in the whole trap and on those six designs. number of captures/cm2 at every design was equal or meaningfully higher than in the whole trap. it demonstrated a clustering of insects on its surface, which seemed to increase with size. the most stable performance along the five sizes tested was obtained by counting two horizontal strips -tops and bottoms- which means counting around 40% of total surface. thus, that previously fitted method is adequate to predict western flower thrips caught when performed on yellow sticky traps from 100 to 750cm2.