Insect population distribution and density estimates in a large rice mill in Portugal - A pilot study

► Sitophilus zeamais Motschulsky is the key-pest of stored rice followed by Sitophilus oryzae (L.). ► Sitophilus spp. have an aggregated dispersion pattern and bypassed the milling process. ► From Green's sampling plan and RVSP, our current sample size of 25 would yield a precision level of approximately 0.30. ► For a precision level of 0.25, the sampling plan should have 37 traps. ► This sequential sampling plan for Sitophilus spp. can be applied as IPM tactics at rice facilities.