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Biological Control of the Cassava Hornworm Erinnyis ello (Lepidoptera: Sphingidae)

A. C. Bellotti, B. Arias V. and O. L. Guzman
The Florida Entomologist
Vol. 75, No. 4 (Dec., 1992), pp. 506-515
DOI: 10.2307/3496132
Stable URL: http://www.jstor.org/stable/3496132
Page Count: 10
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Biological Control of the Cassava Hornworm Erinnyis ello (Lepidoptera: Sphingidae)
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Abstract

Several Lepidoptera attack cassava; of these the cassava hornworm, Erinnyis ello (L) (Sphingidae), is the only serious lepidopteran pest throughout the cassava-growing regions of the Neotropics. Severe attacks cause complete plant defoliation, losses in bulk root production, and lower root quality. Hornworm attacks may be sporadic, are often cyclic and usually unpredictable. Farmers often react to severe attacks by excessive, ill-timed applications of pesticides that may result in resurgence of this pest. Biological control offers an economically feasible and environmentally sound alternative. Approximately 40 natural enemies have been identified including egg and larval parasites, egg, larval, and pupal predators, fungi, bacteria and a virus. Because of the migratory behavior of hornworm adults, this abundance of natural enemies does not prevent periodic hornworm outbreaks. A hornworm baculovirus is highly effective in control of E. ello, and is being utilized by cassava farmers in southern Brazil. /// Varios lepidopteros atacan la yuca, uno de estos es el gusano cachon Ernnyis ello (L) (Sphingidae) el cual es la unica plaga lepidoptera importante en todas las regiones yuqueras del neotropico. Ataques severos causan defoliacion completa de la planta, disminucion en tamano de raices y baja calidad de las mismas. Los ataques de gusano cachon pueden ser esporadicos, a menudo son ciclicos y generalmente impredecibles. Los agricultores reaccionan frequentemente a los ataques de cachon mediante aplicaciones excesivas de pesticidas, lo cual puede originar ataques mas frequentes. El control biologico ofrece una buena y factible alternativa que favorece ademas el medio ambiente. Aproximadamente 40 enemigos naturales han sido identificados incluyendo parasitos de huevos y larvas, predadores en huevos, larvas y pupas, ademas de hongos, bacterias y virus. Debido a el comportamiento migratorio de los adultos de gusano cachon, dicha abundancia de enemigos naturales no previene las explosiones periodicas del mencionado insecto. El Baculovirus es altamente efectivo en el control de E. ello, y actualmente viene siendo utilizado por los agricultores productores de yuca.

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