Nilakhe, S.S. et al. 2014. Spittlebug eggs: comparison of sampling efficiency of sample units of different sizes. Pesquisa Agropecuaria Brasileira. 20, 11 (Apr. 2014), 1245–1250. DOI:https://doi.org/10.1590/S1678-3921.pab1985.v20.16327.