Consumption of low-density polyethylene,polypropylene, and polystyrene materials by larvae of the greater wax moth,Galleria mellonella L. (Lepidoptera,Pyralidae), impacts on their ontogeny |
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Authors: | Ruiz Barrionuevo Juliana María Martín Eduardo Galindo Cardona Alberto Malizia Agustina Chalup Adriana de Cristóbal Ricardo E Monmany Garzia A Carolina |
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Institution: | 1.Instituto de Ecología Regional (Universidad Nacional de Tucumán - Consejo Nacional de Investigaciones Científicas y Técnicas), CC34, Ciudad Universitaria Horco Molle, Yerba Buena, Tucumán, Argentina ;2.Facultad de Ciencias Naturales e Instituto Miguel Lillo (Universidad Nacional de Tucumán), Miguel Lillo 205, San Miguel de Tucumán, Tucumán, Argentina ;3.Fundación Miguel Lillo, Miguel Lillo 251, San Miguel de Tucumán, Tucumán, Argentina ;4.CCT Noa Sur, Consejo Nacional de Investigaciones Científicas y Técnicas, Crisóstomo Alvarez 722, San Miguel de Tucumán, Tucumán, Argentina ;5.Instituto Superior de Investigaciones Biológicas (Universidad Nacional de Tucumán - Consejo Nacional de Investigaciones Científicas y Técnicas), Chacabuco 461, San Miguel de Tucumán, Tucumán, Argentina ; |
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Abstract: | Low-density polyethylene (LDPE), biaxially oriented polypropylene (BOPP), and expanded polystyrene (EXPS) are the most common plastics found in every home of the world, but only ~ 10% enter the recycling chains. Consequently, the study of plastic biodegradation by microorganisms and insects, such as the wax moths, has gained special interest. Galleria mellonella (L.) has been shown to consume single-layered polyethylene and polystyrene, though biological impacts of this consumption have been rarely reported. We evaluated the consumption of different plastics by G. mellonella larvae (L7, mean size: 25–30 mm) and its effect on larval duration, survival, and development. For this, we offered the larvae five diets: single-layered LDPE, EXPS, BOPP, triple-layered polyethylene (SB, for silo-bags), and a control with beeswax. We recorded the state and weight of the materials and the state of larvae until they reached the adult stage. Larvae consumed more PE (both LDPE and SB) and EXPS than BOPP; still, they were able to emerge as adults in all treatments. Larvae that consumed plastics turned into pupal stage faster than those that consumed beeswax, regardless of the type and amount of plastic consumed. This is the first report of wild G. mellonella larvae in Argentina consuming biaxially polypropylene and silo-bags. |
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