Abstract The common blossom thrips, Frankliniella schultzei (Thysanoptera: Thripidae) (Trybom), is an important pest of melons (Cucumis melo). This species is found on all continents, but especially in tropical and subtropical regions. Decision-making systems are essential parts of Integrated Pest Management (IPM) programs. Sampling plans and decision-making indices are two critical components for an effective and successful IPM program. Sequential sampling plans have a variable number of samples as a function of pest density. Economic Injury Level (EIL) is the most commonly used decision-making index in IPM programs. Despite the importance of the impact of Frankliniella schultzei on Cucumis melo, economic injury levels and sequential sampling plans for this pest have not yet been determined. Thus, this study aimed to determine the control decision-making system for F. schultzei. To this end, research was conducted over two years in 39 commercial melon fields. The EIL was calculated based on control costs and melon production value as a function of F. schultzei density. The sequential sampling plan was developed based on the binomial sequential probability ratio test. Attack up to 9 thrips. sample−1 reduced the yield of melon fields by 46%. The cost of thrips control represented 1.85% of the production value of the melon fields. The EIL for F. schultzei was 0.36 thrips per sample. The sequential sampling plan made correct decisions in 100% of situations and saved more than 85% of sampling time and cost. In conclusion, this decision-making system can be incorporated into melon field IPM programs to help farmers make correct decisions when the monitoring this pest, as well as reduce the costs and sampling times.

中文翻译：

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商品瓜田富兰克林蓟马管理决策系统

摘要 常见的花蓟马Frankliniella schultzei (Thysanoptera: Thripidae) (Trybom) 是瓜类(Cucumis melo) 的重要害虫。该物种在各大洲都有发现，尤其是在热带和亚热带地区。决策系统是虫害综合管理 (IPM) 计划的重要组成部分。抽样计划和决策指标是有效和成功的 IPM 计划的两个关键组成部分。顺序抽样计划具有可变数量的样本，作为有害生物密度的函数。经济伤害水平 (EIL) 是 IPM 计划中最常用的决策指标。尽管 Frankliniella schultzei 对甜瓜的影响很重要，但尚未确定该害虫的经济伤害水平和顺序抽样计划。因此，本研究旨在确定 F. schultzei 的控制决策系统。为此，对 39 个商品瓜田进行了两年多的研究。EIL 是根据控制成本和甜瓜产值作为 F. schultzei 密度的函数计算的。序贯抽样计划是基于二项式序贯概率比检验制定的。攻击最多9个蓟马。样品-1 使瓜田的产量减少了 46%。蓟马防治成本占瓜田产值的1.85%。F. schultzei 的 EIL 为每个样品 0.36 蓟马。顺序抽样方案在 100% 的情况下做出正确决策，节省了 85% 以上的抽样时间和成本。综上所述，