First report of Hexamermis sp. (Nematoda: Mermithidae) parasitizing Eurygaster maura (Heteroptera: Scutelleridae) in an overwintering area
Keywords:
cereal crop, European sunn pest, parasitic nematode, wheatAbstract
The European sunn pest, Eurygaster maura (L.) (Heteroptera: Scutelleridae), is an insect of great importance to wheat (Triticum spp.; Poales: Poaceae), and other small grains in the Central Anatolia Region of Turkey. Natural parasitism of this pest by a parasitic nematode, Hexamermis sp. (Nematoda: Mermithidae), was reported for the first time in Ankara, Turkey, in 2013. During the next year, adults of E. maura were collected from an overwintering area under plant leaf litter and brought to the laboratory and sexed. After killing, they were dissected to determine the presence or absence of mermithids. Natural parasitism rates caused by the parasitic nematode were calculated individually for females and males of the sunn pest. The parasitism rates in the overwintering area were 20.0% for females and 31.6% for males during 2014. These findings suggest that Hexamermis sp. has potential as a biological control agent of E. maura.
Sumario
El chinche plaga Europea de sunn, Eurygaster maura (L.) (Heteroptera: Scutelleridae), es un insecto de gran importancia en el trigo (Triticum spp .; Poales: Poaceae) y otros cultivos de cereales en la Región Central de Anatolia, Turquía. El parasitismo natural de esta plaga por un nematodo parásito, Hexamermis sp. (Nematoda: Mermithidae), se reportó para su primer registro en Ankara, Turquía, en el 2013. En el año siguiente, los adultos de E. maura fueron recolectados de áreas de hibernación debajo de escombros de plantas llevados al laboratorio y su sexo determinado. Después de matarlos, fueron diseccionados con el fin de determinar la presencia o ausencia de mermithids. Por lo tanto, las tasas de parasitismo naturales causados por el nematodo parásito se calcularon por separado para hembras y machos del chinche plaga de sunn. Las tasas de parasitismo en las áreas de hibernación fueron 20.0% para las hembras y 31.6% para los machos en 2014. Estos hallazgos sugieren que Hexamermis sp. tiene potencial como agente de control biológico de E. maura en un programa de control integrado.
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