Estimation of Leafmine Density of Liriomyza trifolii (Diptera: Agromyzidae) in Cherry Tomato Greenhouses using Fixed Precision Sequential Sampling Plans

• Published in: Journal of Asia-Pacific entomology Vol. 8; no. 1; pp. 81 - 86
• Main Authors: Lee, Doo Hyung, Park, Jung-Joon, Park, Heungsun, Cho, Kijong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2005; 한국응용곤충학회
• Subjects: Agromyzidae; American serpentine leafminer; Diptera; DISTRIBUCION ESPACIAL; DISTRIBUTION SPATIALE; leafmine; Liriomyza trifolii; Lycopersicon esculentum; resampling simulation; sequential sampling; SPATIAL DISTRIBUTION; Taylor's power law; validation; 농수해양학; sequential sampling; Taylor's power law; leafmine; spatial distribution; validation; American serpentine leafminer; resampling simulation
• ISSN: 1226-8615; 1876-7990; 1876-7790
• DOI: 10.1016/S1226-8615(08)60074-6

This study was conducted to develop sequential sampling plans to estimate leafmine density by Liriomyza trifolii (Burgess) at three fixed-precision levels in commercial tomato greenhouses. The within-greenhouse spatial patterns of leafmines were aggregated. The slopes and intercepts of Taylor's power law did not differ between greenhouses and years. A fixed-precision level sampling plan was developed using the parameters of Taylor's power law generated from total number of leafmines in a tomato leaf (consisted of 7 leaflets) at three precision levels ( D) of 0.20, 0.25, and 0.30. The resulting sampling plans were tested with sequential bootstrap simulations ( n = 500) using 9 independent data sets for validation. Bootstrap simulation within a wide range of densities demonstrated that actual D′ values at desired D = 0.30 averaged < 0.29 in all cases. even at the lowest density of leafmine (0.16 mines per leaf), the actual mean D′ value was 0.24 at D = 0.30. This result shows that the sampling plan developed in this study is effective and reliable for estimating the mine densities in tomato greenhouses.