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Modeling the effect of Russian wheat aphid, Diuraphis noxia (Mordvilko) and weeds in winter wheat as guide to management

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Title Modeling the effect of Russian wheat aphid, Diuraphis noxia (Mordvilko) and weeds in winter wheat as guide to management
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Creator Subhash Chander , Lajpat R. Ahuja , Frank B. Peairs, P.K. Aggarwal , Naveen Kalra
 
Subject Economic injury level; Russian wheat aphid; Simulation models; Weeds; Winter wheat
 
Description Not Available
Infocrop, a generic crop growth model was used to simulate the effect of Russian wheat
aphid, Diuraphis noxia (Mordvilko) damage on winter wheat at Fort Collins and Akron,
Colorado state, USA,. Observed and simulated yield reductions in four experiments over a
period of two years were found to be closely related (R2 = 0.85). The aphid damage mechanisms
coupled to the crop growth model could thus be validated through field experimental
data. Economic injury levels for Russian wheat aphids determined with the validated model
revealed that winter wheat was more prone to aphid attack during early growth stages than
during late tillering and heading. Economic injury level changed among years and were
directly related to cost of control but inversely related to market value of winter wheat. Infocrop
and GPFARM were used to simulate effect of downy brome weed, Bromus tectorum L.,
at Hays, Kansas state, USA and Cheyenne, Wyoming state, USA and jointed goat grass, Aegilops
cylindrica Host at Archer, Wyoming, USA on winter wheat. Both models simulated the
effect of downy brome on winter wheat well. The average observed and simulated yield reductions
with Infocrop over a period of three years were closely related (R2 = 0.941). The effect ofjointed goat grass on winter wheat was simulated appropriately by GPFARM but not by Infocrop
for want of required data on relative weed cover. Validated simulation models can be
used for various applications such as for establishing economic thresholds and devising
iso-loss curves for the pests. Simulation models have a great potential as guides for optimal
pesticide use.
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Date 2024-04-30T14:37:48Z
2024-04-30T14:37:48Z
2006-01-01
 
Type Research Paper
 
Identifier Chander, S., Ahuja, L.R., Peairs, F.B., Aggarwal, P.K. and Kalra, N. 2006. Modeling the effect of Russian wheat aphid, Diuraphis noxia (Mordvilko) and weeds in winter wheat as guide to management. Agricultural Systems 88(2-3):494-513.Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/82469
 
Language English
 
Relation Not Available;
 
Publisher Elsevier