ArticleJournal of economic entomology2026
Mitochondrial haplotype diversity and population dynamics of the sugarcane borer, Diatraea saccharalis (Lepidoptera: Crambidae), in Jamaica.
Article in Journal of economic entomology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The sugarcane borer, Diatraea saccharalis (Fabricius) (Lepidoptera: Crambidae), is a major pest of sugarcane in the Caribbean, yet little is known about the genetic structure of populations in the region. In this study, the genetic diversity and phylogeographic relationships of D. saccharalis in Jamaica, a major island in the Caribbean, were evaluated based on mitochondrial cytochrome oxidase subunit I (COI) sequences. A total of 25 haplotypes were identified among 239 individuals sampled from 25 locations across the island. Overall genetic diversity was moderate, with site-level diversity ranging from very low to high. The widespread occurrence of a single dominant haplotype, along with a star-like haplotype network and low significant population differentiation, suggested high gene flow across the island. Analysis of molecular variance (AMOVA) showed that most genetic variation (94.47%) occurred within populations, with only 5.53% between populations. Neutrality tests produced significantly negative values, consistent with recent demographic expansion. Phylogenetic analysis placed the Jamaican haplotypes in a distinct Caribbean Clade closely associated with populations from Florida, indicating regional genetic structuring. These findings provide important insights into the evolutionary history of D. saccharalis and highlight the value of incorporating population genetic data into sustainable pest management strategies for the Caribbean.
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