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Effects of the plant strengthener BION® on the fitness and feeding behavior of the cotton aphid Aphis gossypii (Glover) on melon plants?

Research Areas
  • Entomology

Plant strengtheners are modern agricultural products that enhance plant resistance to biotic and abiotic stresses. Among plant strengtheners, the active ingredient of the plant activator BION® (acibenzolar-S-methyl; Syngenta, Spain) has been developed as an inducer of systemic acquired resistance that promotes plant resistance against several plant pathogens and pests. In this study, we evaluated the effect of BION® in the development, reproduction and feeding behavior of Aphis gossypii on melon plants (Cucumis melo L., Cucurbitaceae) with the goal of assessing the possible persistence of BION® in those plants. Aphis gossypii was exposed to melon plants at 0 (fresh residue), 4 and 7 days after sprayed BION® (50 g/ha), using water-sprayed plants as control. For the fitness experiment, mortality of nymphs and adult aphids from first-generation; pre-reproductive time (d); number of progeny produced in a period equal to the pre-reproductive time (Nd); intrinsic rate of natural increase (rm); mean generation time (Td) and mean relative growth rate (RGR); were calculated on each treatment. Nymphal mortality in fresh residue treatment was 100 %, so no population parameters could be analyzed subsequently. Nymphal and adults mortality of four-day-old residue (21%, 54%, respectively) were higher than control (11%, 15%) and seven-day-old residue (4%, 20%). There was a significant decrease in Nd, rm and RGR in four-day-old residue treatment compared with the rest of the treatments, but no statistical differences between control and seven-day-old residue treatment were found. In addition to the fitness experiments a feeding behavior study is being conducted by means of the electrical penetration graph (EPG) technique using synchronized adults of A. gossypii exposed to melon plants at fresh residue and four days after BION® spray-off, in comparison with those fed on untreated plants. The possible toxicity of BION® will be discussed on the basis of our findings.
3rd Hemipteran-Plant Interactions Symposium. HPIS 2017
Madrid, Spain
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3rd Hemipteran-Plant Interactions Symposium. HPIS 2017

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Manejo Integrado de Plagas
  • Departamento: Producción Agraria