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Crop Mineral Nutrient and Yield Responses to Aphids or Barley Yellow Dwarf Virus in Spring Wheat and Oat

Permanent URL:
http://handle.nal.usda.gov/10113/11598
File:
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Abstract:
Root system biomass reductions caused by aphid feeding or aphid-transmitted viral disease may affect root system function in spring wheat (Triticum aestivum L.) or oat (Avena sativa L.). A 2-yr field experiment was conducted to determine how leaf mineral nutrients (N, P, K, Ca, Mg, Zn, Fe, Mn, and Cu), chlorophyll (chl), and agronomic traits (leaf area index [LAI], leaf area plant-1, midday differential canopy temperature deviation from control [dT], yield, and yield components) responded to crop stress imposed by aphid feeding (greenbugs [GB], Schizaphis graminum Rondani; Russian wheat aphids [RWA], Diuraphis noxia Mordvilko; bird cherry-oat aphids [BCOA], Rhopalosiphum padi L.) or by an aphid-vectored virus (barley yellow dwarf virus, Luteovirus, PAV strain [BYDV]). Leaf chl, N, Ca, and Mg concentrations (measured at the boot development stage) were about 25% less in BYDV-infected than control treatments. Grain yield deviation from control (dY) was most negative for BYDV treatment (-2164.5 kg ha-1) and least negative for GB treatment (-745.5 kg ha-1), with RWA (-900.6 kg ha-1) and BCOA (-789 kg ha-1) treatments having intermediate effects. Mineral nutrients (N, K, Mg, and Mn) and chl were significantly correlated (Canonical r = 0.94, p < 0.0001) with agronomic traits (LAI, dT, leaf area, and grain yield), and explained 62.1% of the variation in agronomic traits. Thus, leaf concentrations of certain chemical constituents of cereal plants are highly correlative to agronomic traits important in cereal plant responses to stress caused by aphid-feeding damage or aphid-vectored disease.
Author(s):
Riedell, W.E. , Osborne, S.L. , Jaradat, A.A.
Subject(s):
Triticum aestivum , spring wheat , Avena sativa , oats , grain yield , plant nutrition , mineral content , field experimentation , chlorophyll , agronomic traits , leaf area index , canopy , air temperature , yield components , Diuraphis noxia , Schizaphis graminum , Rhopalosiphum padi , insect pests , plant pests , insect vectors , Barley yellow dwarf virus , South Dakota
Format:
p. 1553-1560.
Note:
Includes references
Source:
Crop science 2007 July-Aug, v. 47, no. 4
Language:
English
Year:
2007
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.