Development of Sampling Strategies for Larvae of Liriomyza trifolii (Diptera: Agromyzidae) in Chrysanthemums

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Abstract
Dispersion analysis with Taylor's power law was used in development of binomial sampling plans for larvae of Liriomyza trifolii (Burgess) in chrysanthemums. Covariance analysis showed that variance/mean relationships were consistent between different plant strata and between a plot that contained only one chrysanthemum cultivar versus a plot that contained seven different cultivars. Comparison of a constant precision sample (C = 0.10) and a fixed sample size of 100 leaves showed that the fixed sample size provided better estimates of mean population level. The utility of a sampling plan that allows rapid assessment of immature leafminer population levels in a pest management system is discussed.