Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377025
Title: Pesticides and natural enemies (particularly ground beetles) of aphids on potato
Author: Dixon, Peggy L.
ISNI:       0000 0001 3426 0482
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1987
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Abstract:
The arthropod fauna of fields of ware potatoes in eastern Scotland was assessed to determine the species composition and relative abundance of the natural enemies of aphids on potato. Aphids and aphid-specific predators and parasitoids were surveyed by visual searches of foliage; epigeal arthropods were assessed by pitfall trapping. Aphid-specific natural enemies were generally uncommon but may have been underestimated. Approximately 11,000 animals were caught in pitfall traps and most were of the ground beetle genus Pterostichus (Coleoptera : Carabidae). Gut dissections showed that 14.4 and 30.5 per cent of Pterostichus melanarius and Pterostichus madidus respectively, contained aphid remnants. In the laboratory, demeton-S-methyl applied directly to these beetles had little apparent effect but 19.1 per cent died after consumption of treated aphids. Field experiments indicated that demeton-S-methyl influenced the trap catch of Pterostichus spp by altering their predatory activity. Caution should thus be exercised when interpreting such data. It is suggested that certain species of Carabidae may be important in the control of aphids on potato. Their potential is discussed and suggestions given for further research.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.377025  DOI: Not available
Keywords: Control of aphids on potato
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