Westfalia Technological Services, P.O. Box 1103, Tzaneen 0850, South Africa.
J Econ Entomol. 2010 Oct;103(5):1577-85. doi: 10.1603/ec10034.
Sternochetus mangiferae (F.) (Coleoptera: Curculionidae) is a quarantine pest of mango, Mangifera indica L., in South Africa. The aim of the study was to test cultural and chemical control measures in a systems approach for risk mitigation of S. mangiferae in South Africa. A large-scale experiment, using a randomized block design with three replicates, was undertaken on 'Tommy Atkins' mangoes in South Africa. Five treatment combinations were applied over two seasons: (1) untreated control; (2) sanitation and physical removal of egg-infested fruit (P+S); (3) thiamethoxam, P+S; (4) thiamethoxam, fipronil, P+S; and 5) thiamethoxam, two fenthion applications, P+S. A weekly random sample of eight fruit from 40 trees per orchard was taken from 5 wk to harvest over two harvest periods. In total, 57,600 fruit were sampled. In a separate experiment, the same variety was used to test the efficacy of covering fruit with paper bags over one season in a completely randomized design. In both trials, all the pests were recorded from internal and external fruit inspections. In trial 1, results after the first season showed >98% control in the three chemical combination treatments. In the second season, treatment 2 provided 19% and treatment 3 99.9% control, whereas no fruit were infested with S. mangiferae in treatments 4 and 5. Trial two showed that fruit bagging significantly reduced S. mangiferae infestation. The data showed that a systems approach for S. mangiferae control in South Africa can be effective and that bagging can be an effective organic control option.
芒果象甲（Sternochetus mangiferae（F.））是南非芒果（Mangifera indica L.）的检疫性害虫。本研究旨在采用系统方法测试文化和化学防治措施，以降低南非芒果象甲的风险。在南非，采用随机区组设计，重复 3 次，对‘Tommy Atkins’芒果进行了大规模试验。两个季节共应用了 5 种处理组合：（1）未处理对照；（2）卫生和物理去除卵侵染的果实（P+S）；（3）噻虫嗪，P+S；（4）噻虫嗪、氟虫腈，P+S；（5）噻虫嗪、两次使用倍硫磷，P+S。每个果园从 40 棵树中每周随机抽取 8 个果实，从第 5 周开始，持续两个收获期。总共采集了 57600 个果实。在一个单独的实验中，同一品种用于在一个季节内用纸袋覆盖果实的功效测试，采用完全随机设计。在这两个试验中，所有害虫均通过内部和外部果实检查进行记录。在试验 1 中，第一个季节的结果表明，三种化学组合处理的防治效果均超过 98%。在第二个季节，处理 2 提供了 19%的防治效果，处理 3 提供了 99.9%的防治效果，而处理 4 和处理 5 中没有果实受到芒果象甲的侵染。试验二表明，果实套袋可显著降低芒果象甲的侵染。数据表明，南非芒果象甲控制的系统方法可以是有效的，并且套袋可以是一种有效的有机防治选择。
