Soil potassium deficiency affects soybean phloem nitrogen and soybean aphid populations.

@article{Walter2007SoilPD,
  title={Soil potassium deficiency affects soybean phloem nitrogen and soybean aphid populations.},
  author={Abigail Jan Walter and Christina D. Difonzo},
  journal={Environmental entomology},
  year={2007},
  volume={36 1},
  pages={
          26-33
        }
}
The soybean aphid is an invasive pest in the midwest United States, with frequent population outbreaks. Previous work has shown that aphid population densities are higher on potassium-deficient soybean than on healthy soybean. The experiments reported here test the hypotheses that the potassium nutrition of the host plant affects the forms of phloem nitrogen available to soybean aphids, and subsequently, their abundance. In field surveys and an exclusion cage study when aphid populations were… CONTINUE READING

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