Influence of Potassium Fertility on Soybean Aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), Population Dynamics at a Field and Regional Scale

By S. Myers, Claudio Gratton. 2006

86 citations recorded by the source corpus.

Abstract Soybean aphid populations have been hypothesized to respond to nutrient availability in soybean plants. We examined how soil potassium (K) deficiency affects soybean aphid population at both regional and field level scales. First, we measured soil and leaf nutrient levels and monitored soybean aphid populations in 34 production soybean fields throughout Wisconsin. A principle component analysis (PCA) was used to examine the relationship between soil and leaf nutrients and soybean aphid population growth. Results showed that aphid population growth rate was negatively correlated with soil K and P and leaf K, N, P, and S, whereas peak aphid densities were positively correlated with the same suite of soil and leaf nutrients. In a manipulative field experiment, we established low, medium, and high K fertility soybean plots and determined life table parameters of soybean aphids. Aphids developing within clip-cages showed a significantly greater intrinsic rate of population increase and net reproductive rate in the low K treatments in comparison with the medium and high K treatments. In these same plots, naturally colonizing populations of soybean aphids also had significantly higher peak abundance and rate of population increase in the low K treatment compared with medium and high K treatments. In general, these findings indicate that soil K availability and leaf K levels affect plant quality and may play an important role in soybean aphid population dynamics.

Subfields: Ecology, Evolution, Behavior and Systematics, Insect Science

View Paper: https://www.semanticscholar.org/paper/5d60d3cd02cee88ed76201127e41511939c431f9

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Ecology, Evolution, Behavior and Systematics

1. A. Costamagna
2. M. O'Neal
3. D. Ragsdale

In Insect Science

1. A. Costamagna
2. M. O'Neal
3. K. Tilmon
4. E. Hodgson
5. N. Tinsley
6. D. Landis

Citations in the corpus

• Performance and prospects of Rag genes for management of soybean aphid (2013, background): “For example, soybean grown in potassium-deficient soils has elevated concentrations of key amino acids that are essential for optimal soybean aphid population growth (Myers et al., 2005; Myers & Gratton, 2006; Walter & DiFonzo, 2007).”
• Management Recommendations for Soybean Aphid (Hemiptera: Aphididae) in the United States (2012, background): “In another study, low potassium treatments had higher peak aphid abundance and rates of population increase compared with medium and high potassium treatments (Myers and Gratton 2006).”