Catfacing and gummosis/sap-type injury associated with a heteropteran pest complex were sampled at five peach orchards in southern Florida during two consecutive growing seasons. Trapping and visual surveys indicate that Euschistus servuis (Say) (Hemiptera: Pentatomidae) was the dominant heteropteran pest in the study orchards. The spatial arrangement of injury indicated a random distribution, as determined by Taylor’s power law. Spatial analysis by distance indices indicated a random arrangement of fruit injury in a majority of the sample site × date combinations and analysis of local clustering did not provide evidence of patches of fruit injury occurring near orchard borders. The coefficients from Taylor’s power law were used to develop sequential sampling plans based on hypothetical injury thresholds. Sequential sampling plans were compared to a simple random sample of 15 sample units using a simulation approach. The sequential sampling plan was able to achieve equivalent levels of accuracy when compared to the 15-unit fixed sampling plan while reducing the number of sample units required to an average of 7.99. The sequential sampling plans developed in this study are an improvement over simple random sampling; however, further research is needed to determine how to best implement sequential sampling of fruit injury in Florida peach orchards to better inform management decisions.

中文翻译：

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佛罗里达桃异翅目相关果病害序列抽样方案的空间分布及发展分析

在连续两个生长季节期间，在佛罗里达州南部的五个桃园对与异翅目害虫复合体相关的猫面和树胶/树液型损伤进行了采样。诱捕和目视调查表明 Euschistus servuis (Say) (Hemiptera: Pentatomidae) 是研究果园中的主要异翅目害虫。损伤的空间排列表明随机分布，由泰勒幂定律确定。通过距离指数进行的空间分析表明，在大多数样本点 × 日期组合中果实损伤的随机排列，并且局部聚类分析没有提供在果园边界附近发生果实损伤斑块的证据。泰勒幂律中的系数用于制定基于假设损伤阈值的顺序抽样计划。使用模拟方法将顺序抽样计划与 15 个样本单元的简单随机样本进行比较。与 15 个单位的固定抽样计划相比，顺序抽样计划能够达到同等水平的准确度，同时将所需的样本单位数量平均减少到 7.99 个。本研究开发的顺序抽样计划是对简单随机抽样的改进；然而，需要进一步的研究来确定如何最好地对佛罗里达桃园的果实损伤进行顺序抽样，以更好地为管理决策提供信息。99. 本研究制定的顺序抽样计划是对简单随机抽样的改进；然而，需要进一步的研究来确定如何最好地对佛罗里达桃园的果实损伤进行顺序抽样，以更好地为管理决策提供信息。99. 本研究制定的顺序抽样计划是对简单随机抽样的改进；然而，需要进一步的研究来确定如何最好地对佛罗里达桃园的果实损伤进行顺序抽样，以更好地为管理决策提供信息。