The density of sweetpotato whitefly, Bemisia tabaci, on greenhouse paprika (Capsicum annuum var. angulosum) were determined by counts of the number of B. tabaci per leaflet in Jinju, Gyeungsangnamdo during 2014. Binomial sampling plans were developed based on the relationship between the mean density per leaf (m) and the proportion of leaf infested with less than T B. tabaci per leaf (PT), according to empirical model (ln(m) = α + β(ln(-ln(1-PT))). T was defined as tally threshold, and set to 1, 2, 3, 4, 5 (adults) and 1, 3, 5, 7 (pupae) per leaf in this study. Increasing sample size, regardless of tally threshold, had little effects on the precision of the binomial sampling plan. Increasing sample size had little effect on the precision of the estimated mean regardless of tally thresholds. T=1 was chosen as the best tally threshold for estimating densities of B. tabaci adults based on the precision on the model and T=3 was best tally thresholds in B. tabaci pupae. Using the results obtained in the greenhouse, simulated validation of the developed sampling plan by RVSP (Resampling Validation for Sampling Plan) indicated the suitable results.

• Wonseok Choi(Department of Plant Medicine, Gyeongsang National University, Jinju)
• Taechul Park(Department of Plant Medicine, Gyeongsang National University, Jinju)
• Junyeong Park(Department of Plant Medicine, Gyeongsang National University, Jinju)
• Ji-hun Kim(Department of Plant Medicine, Gyeongsang National University, Jinju)
• Ho-jeong Choi(Department of Plant Medicine, Gyeongsang National University, Jinju)
• Jung-Joon Park(Department of Plant Medicine, Gyeongsang National University, Jinju , Institute of Agriculture and Life Science, Gyeongsang National University, Jinju)