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Effects of Sweet Alyssum Flowers on the Longevity of the Parasitoid Wasps Cotesia marginiventris (Hymenoptera: Braconidae) and Diadegma insulare (Hymenoptera: Ichneumonidae)

Denise L. Johanowicz and Everett R. Mitchell
The Florida Entomologist
Vol. 83, No. 1 (Mar., 2000), pp. 41-47
DOI: 10.2307/3496226
Stable URL: http://www.jstor.org/stable/3496226
Page Count: 7
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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.
Effects of Sweet Alyssum Flowers on the Longevity of the Parasitoid Wasps Cotesia marginiventris (Hymenoptera: Braconidae) and Diadegma insulare (Hymenoptera: Ichneumonidae)
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Abstract

The effects of sweet alyssum (Lobularia maritima) (Brassicaceae) flowers on the longevity of two augmentatively-released parasitoids, Cotesia marginiventris (Cresson) (Hymenoptera: Braconidae) and Diadegma insulare (Cresson) (Hymenoptera: Ichneumonidae), were studied in a greenhouse experiment. C. marginiventris and D. insulare survived approximately 4.8 and 12.7 times longer, respectively, when provisioned with honey or with sweet alyssum than with water alone. Sweet alyssum planted in northern Florida cabbage fields may be one way to improve biological control by augmentatively-released natural enemies of lepidopteran pests by increasing adult parasitoid longevity during times when few wild plants are in bloom. /// Se estudiaron los efectos de flores de Lobularia maritima (Brassicaceae) en la longevidad de dos parasitoides, Cotesia marginiventris (Cresson) (Hymenoptera: Braconidae) y Diadegma insulare (Cresson) (Hymenoptera: Ichneumonidae), liberados de manera incremental bajo condiciones de invernadero. C. marginiventris y D. insulare sobrevivieron aproximadamente 4.8 y 12.7 veces más tiempo, respectivamente, cuando se les alimentó con miel o con flores de L. maritima, que cuando se les alimentó sólo con agua. En el Norte de Florida, la siembra de plantas de L. maritima dentro de cultivos de col podría ser una manera de mejorar el control biológico de plagas lepidópteras. De esta manera, la longevidad de los parasitoides adultos se incrementaría cuando existan pocas plantas de L. maritima creciendo de manera silvestre.

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