Density survey should be carried out for applying integrated pest management strategies, but it is labor-intensive, time- and cost-consuming. Therefore, binomial sampling plans are developed for estimating and classifying the population density of whiteflies late larvae based on the relationship between the mean density per sample unit (7 leaflets) and the proportion of leaflets infested with less than T whiteflies ( ). In this study, models were examined using tally thresholds ranging from 1 to 5 late larvae per 7 leaflets. Regardless of tally thresholds, increasing the sample size had little effect on the precision of the binomial sampling plan. Based on the precision of the model, T=3 was the best tally threshold for estimating the densities of late larvae. Models developed using T=3 validated by Resampling Validation for Sampling Plan program. Above all, the binomial model with T=3 performed well in estimating the mean density of whiteflies in greenhouse tomato.

• SoEun Eom(Department of Plant Medicine, Gyeongsang National University)
• Taechul Park(Department of Plant Medicine, Gyeongsang National University)
• Jiwon Jeong(Department of Plant Medicine, Gyeongsang National University)
• Jung-Joon Park(Department of Plant Medicine, Gyeongsang National University, Department of Applied Biology, Institute of Agriculture and Life Science, Gyeongsang National University)