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Simulation of climatic change impact on crop-pest interactions: a case study of rice pink stem borer Sesamia inferens (Walker)

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Title Simulation of climatic change impact on crop-pest interactions: a case study of rice pink stem borer Sesamia inferens (Walker)
Not Available
 
Creator Selvaraj Krishnan & Subhash Chander
 
Subject Pink stem borer, simulation, climate change, thermal constant
 
Description Not Available
As climatic change impacts would depend upon complex interactions between
climatic and biological factors, crop simulation models would play an important role in
predicting such an impact. Present study thus aimed at simulating climatic change impacts on
crop-pest interactions through a coupled crop-pest model. Based on temperature-dependent
development of pink stem borer, Sesamia inferens (Walker) at six constant temperatures viz.,
18, 21, 24, 27, 30, 33 and 35±1 °C, thermal constants for eggs, larvae and pupae were
determined as 47.6, 700 and 166.7° days, respectively through a linear model with corresponding
lower development thresholds being 13.8, 10.6 and 12.7 °C. Besides, optimum temperature
and upper developmental threshold, respectively were found to be 34.6 and 36.2 °C for eggs,
34.5 and 36.4 °C for larvae, and 31.7 and 37.0 °C for pupae of the pink stem borer through a
non-linear model. Based on the thermal requirements, and biotic and abiotic mortalities, a
mechanistic holometabolous population simulation model for S. inferens was developed and
coupled to InfoCrop-rice model. This coupled InfoCrop model could satisfactorily simulate the
PSB dynamics and crop-pest interactions. Validated model was used to simulate the impacts of
climatic change on S. inferens population and rice crop in accordance with four ‘standard
special report on emissions scenarios’, A1, A2, B1 and B2. Simulations revealed that S. inferens
population would decline to the extent of 5.82–22.8%by 2020 and 19.0–42.7%by 2050 under
Delhi conditions. Following decline in pest population, S. inferens induced yield losses also
revealed a declining trend under changed climate. The coupled crop-pest model can be easily
adapted to diverse agro-environments and applied to simulate the pest dynamics and crop losses
under location-specific situations.
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Date 2024-04-30T14:38:03Z
2024-04-30T14:38:03Z
2015-01-01
 
Type Research Paper
 
Identifier Selvaraj, K. and Chander, S. 2015. Simulation of climatic change impact on crop-pest interactions: a case study of rice pink stem borer Sesamia inferens (Walker). Climatic Change 131 (2): 259-272
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/82471
 
Language English
 
Relation Not Available;
 
Publisher Springer