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The association ofErwinia carotovora var.atroseptica andErwinia carotovora var.carotovora with insects in Colorado |
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| Authors: | J. W. Kloepper M. D. Harrison J. W. Brewer |
| Affiliation: | 1. Department of Plant Pathology, University of California, Berkeley, CA 2. Botany and Plant Pathology, Colorado State University, USA 3. Zoology/Entomology, Colorado State University, USA |
| Abstract: | Ten genera from 9 families of dipterous insects collected in the field in the San Luis Valley of Colorado were contaminated withErwinia carotovora var.atroseptica (Eca) andErwinia carotovora var.carotovora (Ecc).Erwinia-contaminated insects were collected from settling ponds near potato warehouses, potato cull piles on growers’ farms, municipal dumps, lettuce and potato fields. The percentage of contaminated insects reached 14.5% in early spring but decreased as the season progressed. Insects were more commonly contaminated withEca thanEcc early in the season. Later the proportion of contamination byEcc increased while that ofEca decreased. We suggest that insects may play a potentially important role in the epidemiology of potato blackleg especially in the reintroduction ofErwinia intoErwiniafree potato fields. |
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