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- Briggs, C.J., et al. Show all 2 Author
- Environmental entomology 2007 v.36 no.4 pp. 776-791
- plant tissues; food webs; Pyrus communis; arthropod communities; community structure; biological control agents; predatory arthropods; herbivores; carbon nitrogen ratio; Cacopsylla pyricola; stable isotopes; omnivores
- ... Documenting trophic links in a food web has traditionally required complex exclusion experiments coupled with extraordinarily labor-intensive direct observations of predator foraging. Newer techniques such as stable isotope analysis (SIA) may facilitate relatively quick and accurate assessments of consumer feeding behavior. Ratios of N and C isotopes are thought to be useful for determining specie ...
- Briggs, C.J., et al. Show all 3 Authors
- Biological control 2007 v.43 no.3 pp. 257-264
- Cacopsylla pyricola; population density; population growth; nitrogen fertilizers; fertilizer rates; Pyrus communis; pears; plant growth; nitrogen content; predatory insects; natural enemies; Anthocoris nemoralis; predation; biological control agents; tritrophic interactions; insect control
- ... Herbivore population dynamics are governed both by bottom-up (plant-mediated) and by top-down (natural enemy-mediated) processes, with the potential for interaction between them. Pear psylla (Cacopsylla pyricola Foërster) is a phytophagous pest in pear orchards. Pear psylla is commonly attacked by several different natural enemies, but it may escape control, especially if fertilizer additions and ...