Syngenta's monitoring network MIPNET shares field observations of a difficult pest.
Scale of Saint Joseph, Diaspidiotus perniciosus
During the month of December, the second flight of male San José scalefish of each season begins. Weather conditions advance or delay this flight, directly influencing the next generations of migrating nymphs. This season, this second flight is one week late, with maximum captures occurring between the end of December and the first days of January (Graph No. 1). Therefore, the migration of summer nymphs will begin in mid-January with maximum captures. between the end of January and the beginning of February between the regions of Valparaíso and northern O'Higgins. From the southern O'Higgins region to Maule and Ñuble, the Peak catches will occur from mid-February onwards, optimal control period.
Chart No. 1. Capture chart of males of San José scale, from the town of Sarmiento, Curicó commune, Maule Region. Seasons 2020-2021 and 2021-2022.
The migration of summer nymphs of Scale comma, Lepidosaphes ulmi, is in full development. We must not forget that this species It is the main cause of rejections in export cherries with quarantine for China, which requires mandatory post-harvest control in orchard areas where this pest is present.
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