Predicting the occurrence of A. craccivora using a degree day concept in lucerne

Authors

  • J. B. SINGH ICAR-Indian Grassland and Fodder Research Institute, Jhansi-284003, U.P.
  • PRADEEP SAXENA ICAR-Indian Grassland and Fodder Research Institute, Jhansi, Uttar Pradesh, India, 284003
  • PRADEEP BEHARI ICAR-Indian Grassland and Fodder Research Institute, Jhansi-284003, U.P.

DOI:

https://doi.org/10.54386/jam.v19i2.708

Keywords:

Aphis craccivora, pest management, population dynamics, thermal requirements, Lucerne

Abstract

A degree day model was developed to predict the occurrence of Aphis craccivorain Lucerne using 3 years (2007-2009) data and validated with two years (2013-2014) data collected at research farm of ICAR-IGFRI Jhansi.The study indicated that the peak population of the aphid species can be predicted using heat accumulation starting with December 1st. Mean degree day (DD) required for aphids incidence was estimated to be 76 ± 4 degree days in lucerne fields. The peak aphids population was found at 199 accumulated degree days. The polynomial model fitted explains 72 per cent of the variability in lucerne aphids population. The model performance indicators viz mean absolute deviation, standard error, etc  were within the acceptable range and the predictive capability of the model was fairly close to the observed values.

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Published

01-06-2017

How to Cite

J. B. SINGH, PRADEEP SAXENA, & PRADEEP BEHARI. (2017). Predicting the occurrence of A. craccivora using a degree day concept in lucerne. Journal of Agrometeorology, 19(2), 142–144. https://doi.org/10.54386/jam.v19i2.708

Issue

Vol. 19 No. 2 (2017): June

Section

Research Paper

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