Toxicity of the active fraction of Pergularia tomentosa and the aggregation pheromone phenylacetonitrile on Schistocerca gregaria fourth-instar nymph: effects on behavior and acetylcholinesterase activity
Chemical insecticides remain the most used approach in locust control although they present a serious menace to human health and the environment. The search for alternative control methods, efficient and environmentally friendly, has become indispensable. The aim of this work is to study the effect...
| Autores principales: | , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | English |
| Publicado: |
Institution of the Agricultural Research and Higher Education
2018-12-01
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| Colección: | Tunisian Journal of Plant Protection |
| Materias: | |
| Acceso en línea: |
http://www.tjpp.tn/SiteWeb/CurrentIssue/TJPP13_2/4MariemMiladi.pdf
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| Sumario: | Chemical insecticides remain the most used approach in locust control although they present a serious
menace to human health and the environment. The search for alternative control methods, efficient and
environmentally friendly, has become indispensable. The aim of this work is to study the effect of the
aggregation pheromone, phenylacetonitrile, alone or in combination with the active fraction of
Pergularia tomentosa on Schistocerca gregaria fourth-instar nymph. Toxicity bioassays showed that the
combination of phenylacetonitrile with the active fraction of P. tomentosa significantly increased nymph
mortality. Results also showed that the aggregation pheromone caused significant mortality especially
after 6 hours of exposure. The pheromone also caused neurotoxic effects on S. gregaria nymph due to
the disturbance of the acetylcholinesterase activity. We also noted the presence of cannibalism
phenomenon. Phenylacetonitrile seems to have an effect on phase ployphenism of S. gregaria imagos
that exhibit specific traits to the solitarious phase. |
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| ISSN: | 1737-5436 2490-4368 |