Sequential sampling: planthoppers in rice

Abstract A sequential sampling plan was developed for the brown planthopper, Nilaparvata lugens Stal, and the whitebacked planthopper, Sogatella furcifera Horvath in rice. The plan was tested in several different areas in the Philippines and compared with a more intensive sampling technique. Results showed a 100% agreement between the two techniques in decision-making, and an 80% saving in time was realized using the sequential sampling plan.