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Simulation of rice planthopper damage for developing pest management decision support tools

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Title Simulation of rice planthopper damage for developing pest management decision support tools
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Creator D.S. Yadav, Subhash Chander*
 
Subject Economic injury level Iso-loss curve Planthoppers Rice Simulation model
 
Description Not Available
Rice planthoppers’ damage on Pusa Basmati 1 cultivar was simulated with InfoCrop, a generic crop
growth simulation model. The model was calibrated and validated with two experimental data sets on
planthopper population and rice yield that were generated through differential insecticide application
during the rainy season 2006 and 2007. Simulated yield and total dry matter (TDM) in various treatments
over the two experiments were found to be proximal to the observed yields (R2 ¼ 0.972, RMSE ¼ 4.61%)
and TDM (R2 ¼ 0.949, RMSE ¼ 3.25%), respectively. Likewise, the simulated yield and TDM losses were
also respectively close to observed yield losses (R2 ¼ 0.938, RMSE ¼ 13.53%) and TDM losses (R2 ¼ 0.835,
RMSE ¼ 19.12%), suggesting appropriate validation of planthopper damage mechanism on Pusa Basmati 1
rice. Economic injury levels (EILs) of planthoppers were simulated with two control expenditures
involving two applications with each of monocrotophos and imidacloprid, and three market prices of
Pusa Basamti 1 rice. The EIL exhibited a negative relationship with market value of produce but a positive
one with expenditure on control measures. Simulated EILs were comparable to earlier established
empirical EILs, indicating utility of simulation models for developing location specific EILs that may help
in doing away with the use of blanket EILs. Iso-loss curves, devised through validated model, depicted
combinations of crop age and planthopper population that resulted in similar yield losses. Both the EILs
and iso-loss curves can be useful in monitoring planthopper populations and promoting judicious
pesticide applications that would avoid unwarranted control expenditure and environmental contamination.
The simulation models being based on detailed crop ecological and physiological processes and
pest damage mechanism can thus aid in development of location-specific decision support tools and
ensure precision in pest management decisions.
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Date 2024-04-30T14:36:47Z
2024-04-30T14:36:47Z
2010-01-01
 
Type Research Paper
 
Identifier Yadav, D.S. and Chander, S. 2010. Simulation of rice planthopper damage for developing decision support tools. Crop Protection 29: 267-276
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http://krishi.icar.gov.in/jspui/handle/123456789/82463
 
Language English
 
Relation Not Available;
 
Publisher Elsevier