Pungent spices, ground red pepper, and synthetic capsaicin as onion fly ovipositional deterrents

@article{Cowles1989PungentSG,
  title={Pungent spices, ground red pepper, and synthetic capsaicin as onion fly ovipositional deterrents},
  author={Richard S. Cowles and J. E. Keller and James Ryan Miller},
  journal={Journal of Chemical Ecology},
  year={1989},
  volume={15},
  pages={719-730}
}
In laboratory choice experiments, the spices dill, paprika, black pepper, chili powder, ginger, and red pepper deterredDelia antiqua oviposition by 88–100%. Dose-response choice tests demonstrated that 1 mg of ground cayenne pepper (GCP) placed within 1 cm of artificial onion foliage reduced oviposition by 78%. A synthetic analog of capsaicin, the principal flavor ingredient of red peppers, deterred oviposition by 95% when present at 320 ppm in the top centimeter of sand (the ovipositional… CONTINUE READING