We studied the insecticidal effect of plant extracts against larvae of Scyphophorus acupunctatus Gyllenhal (Coleoptera: Curculionidae), an important pest of Agavaceae. In the bioassays, the organic extracts of Argemone mexicana L. (Ranunculales: Papaveraceae), Allium sativum L. (Asparagales: Amaryllidaceae), Bursera grandifolia (Schltdl.) Engl. (Sapindales: Burseraceae), Chenopodium ambrosioides L. (Caryophyllales: Amaranthaceae), Prosopis laevigata (Willd.) M. C. Johnst. (Fabales: Fabaceae), and Tagetes erecta L. (Asterales: Asteraceae), which were individually incorporated into artificial diet at 500 ppm, were fed to 1st instars. The variables studied were larval, pupal, and adult weight, and larval and pupal mortality. The extracts of A. sativum, A. mexicana, P. laevigata, T. erecta, and B. grandifolia reduced larval weight by at least 50%. The greatest larval mortality was caused by the extracts of A. mexicana (53%), A. sativum (43%), and T. erecta (43%), whereas the greatest mortality of pupae was caused by extracts of T. erecta. The results suggest that A. mexicana, A. sativum, and T. erecta extracts have the greatest potential for insecticidal activity against S. acupunctatus.
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1 June 2016
Toxicity of Plant Extracts to Scyphophorus acupunctatus (Coleoptera: Curculionidae)
Ma. Elena Valdés-Estrada,
Lucila Aldana-Llanos,
David Osvaldo Salinas-Sánchez,
Rodolfo Figueroa-Brito,
María C. Hernández-Reyes,
María Guadalupe Valladares-Cisneros
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Florida Entomologist
Vol. 99 • No. 2
June 2016
Vol. 99 • No. 2
June 2016
Allium sativum
Argemone mexicana
bioinsecticide
Tagetes erecta