First report on Plodia interpunctella (Lepidoptera: Pyralidae) in stored Amaranth grains (Amaranthus spp.)

Abstract

Abstract

Objective: The objective of this study was the identification and description of a lepidopterous species that damages amaranth grains stored in Morelos, Mexico.

Design/methodology/approach: During six months, we collected commercial amaranth bars with larvae, the insects were fed with amaranth grains in laboratory conditions to obtain genitalia and we took photographs in confocal laser scanning microscopy. We also took photographs in environmental scanning electron microscopy of the abdominal end of the adults, as well as of the eggs and the first stage larvae.

Results: We present the first report of the appearance of the flour moth Plodia interpunctella in stored amaranth grains in Mexico. This is the first known record of damage to amaranth grains by this pest in the world.

Limitations on study/implications: In the amaranth-producing region of Morelos, Mexico, there is no information on stored amaranth grain pests; this highlights the need of delving in the study of its reproductive biology and ecology upon this new host.

Findings/conclusions: The identification of Plodia interpunctella in amaranth grains will allow the development of a management strategy to prevent the spread of this new pest in the amaranth-producing region.