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5 October 2023 Chemical Attractants in a Scolytinae Trap System in Avocado Orchards
Bruno Laureano-Ahuelicán, Armando Equihua-Martínez, José Abel López-Buenfil, Jesús Romero-Nápoles, Héctor González-Hernández, Clemente de Jesús García-Avila
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Abstract

Scolytines are widely distributed and function to contribute to the balance of natural ecosystems by participating in decomposition of plant organic matter. However, some species with ambrosial habits now are relevant for avocado crops because they are vectors of phytopathogenic fungi. To determine attraction response of Scolytinae individuals to chemical attractants, we evaluated alpha-copaene, querciverol, alpha-copaene + querciverol, and ethanol in eight-funnel Lindgren-type intersection traps. A negative binomial regression test showed significant effect on captures of Scolytinae in response to different treatments (P < 0.001). Ethanol and the alpha-copaene + querciverol combination were more attractive mostly to species with ambrosial habits. The most abundant species of ambrosia beetles were Corthylus flagellifer Bladford, Corthylus luridus Blandford, Xyleborus volvulus Fabricius, and Corthylus detrimentosus Schedl that responded significantly to both treatments. To use preventive measures against beetles that are vectors of phytopathogenic fungi in avocado orchards, we suggest frequent monitoring using traps baited with ethanol or commercial attractants with alpha-copaene + querciverol.

Los escolitinos están ampliamente distribuidos y contribuyen al equilibrio de los ecosistemas naturales, al descomponer la materia orgánica vegetal. Sin embargo, algunas especies con hábitos ambrosiales son relevantes para el cultivo de aguacate al ser vectores de hongos fitopatógenos. Para determinar la respuesta de atracción de individuos de Scolytinae a atrayentes químicos, se evaluó alfa-copaeno, querciverol, alfa-copaeno + querciverol y etanol en trampas de intersección tipo Lindgren de ocho embudos. La prueba de regresión binomial negativa mostró un efecto significativo sobre las capturas de escolitinos a diferentes tratamientos (P < 0.001). El etanol y la combinación alfa-copaeno + querciverol fueron más eficientes en especies con hábitos ambrosiales. Las especies más abundantes con estos hábitos fueron Corthylus flagellifer Bladford, Corthylus luridus Blandford, Xyleborus volvulus Fabricius y Corthylus detrimentosus Schedl, que respondieron significativamente a ambos tratamientos. Para implementar medidas preventivas contra escarabajos ambrosiales vectores de hongos fitopatógenos en huertos de aguacate, sugerimos monitoreos frecuentes utilizando trampas cebadas con etanol o atrayentes comerciales con alfa-copaeno + querciverol.

Bruno Laureano-Ahuelicán, Armando Equihua-Martínez, José Abel López-Buenfil, Jesús Romero-Nápoles, Héctor González-Hernández, and Clemente de Jesús García-Avila "Chemical Attractants in a Scolytinae Trap System in Avocado Orchards," Southwestern Entomologist 48(3), 531-540, (5 October 2023). https://doi.org/10.3958/059.048.0304
Published: 5 October 2023
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