Crops versus Pests

Case study 1 - pest and pathogen regulation in organic versus conventional cereal crops in Europe... 

These authors acknowledge that within-farm comparison of GM- versus non GM-crop cultivation correct for some background factors that influence the outcome of field-level surveys, such as between-farm differences in yields, pest pressure, and education. Different results were generated fiom surveys of farmers who grew both GM- and non GM-varieties on the same farm compared to surveys that sampled GM data from adopters farms and non GM data from non adopters farms. 

All N tabacum plants evaluated for insect resistance and cuticular chemistries were grown under field conditions normally used for the production of flue-cured tobacco at the Clemson University Pee Dee Research and Education Center, Florence, SC the Crops Research Laboratory, Oxford, NC and the University of Georgia Coastal Plain Experiment Station, Tifton, GA. Other Nicotiana species were evaluated at Ojdbrd, NC or Tifton, GA. From 1984-1987 70 accessions of 64 Nicotiana species were planted to evaluate their effects on tobacco budworm and hornworm oviposition in field plots and in choice tests versus NC 2326 in cages (20). In 1985 and 1986 the different Nicotiana species were grown in the field and cuticular chemical extracts were obtained and analyzed in 1985. Field plots were also screened for natural infestations of insect pests. 

Belz RG (2007) Allelopathy in crop/weed interactions - an update. Pest Manag Sci 63 308-326 Belz RG (2008) Stimulation versus inhibition - bioactivity of parthenin, a phytochemical from Parthenium hysterophorus L. Int Dose-Response Soc 6 80-96 Belz RG, Vehni ED, Duke SO (2007) Dose/response relationships in allelopathy research. In Fujii Y, Hiradate S (eds) Allelopathy new concepts and methodologies. Science Publishers, Enfield, NH, pp 3-29... 

---