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Journal Article

Nosema (Microsporida: Nosematidae) Species as Potential Biological Control Agents of Cactoblastis cactorum (Lepidoptera: Pyralidae): Surveys for the Microsporidia in Argentina and South Africa

Robert W. Pemberton and Hugo A. Cordo
The Florida Entomologist
Vol. 84, No. 4 (Dec., 2001), pp. 527-530
DOI: 10.2307/3496383
Stable URL: http://www.jstor.org/stable/3496383
Page Count: 4
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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.
Nosema (Microsporida: Nosematidae) Species as Potential Biological Control Agents of Cactoblastis cactorum (Lepidoptera: Pyralidae): Surveys for the Microsporidia in Argentina and South Africa
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Abstract

Cactoblastis cactorum Berg is an invasive moth in North America where it damages and threatens many native Opuntia cacti. Nosema species of C. cactorum may have potential as biological control agents of the moth. Surveys for Nosema species were made in South Africa, where two of these Microsporidia were described from the moth and in Argentina where these pathogens may have originated. No Nosema were found in the C. cactorum larvae from South Africa and low levels of infection (0-6%) were found in the South American larvae. The low abundance of C. cactorum and the time of collection (austral summer) may be the reasons for the absence of or rarity of Nosema in these surveys. Winter collections of the larvae are suggested to obtain more abundant Nosema for evaluation as potential biocontrols of C. cactorum. /// Cactoblastis cactorum Berg es una polilla invasora en Norte America, donde daña y amenaza muchas especies nativas de Opuntia. Especies de Nosema que atacan a C. cactorum podrían tener potencial como agentes de control biológico. Se realizaron búsquedas de Nosema en Sudafrica donde dos de estos microsporidiosfueron descriptos y en Argentina donde estos patógenos podrían haberse originado. No se hallaron Nosema en larvas de C. cactorum de Sudafrica y se hallaron niveles muy bajos de infección (0-6%) en las larvas de Sud America. La baja abundancia de C. cactorum y el momento de las colecciones (verano austral) podrían ser las razones de la ausencia o rareza de Nosema en las búsquedas. Se sugieren colecciones de larvas durante el invierno para obtener mayor abundancia de Nosema para su evaluación como un agente potencial de control biológico de C. cactorum.

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