Impact of climate change (elevated CO2 and temperature) on growth and development of cowpea pod borer, Maruca vitrata (Fabricius) (Lepidoptera: Crambidae)

Authors

  • MEGHA Department of Agricultural Entomology, University of Agricultural Sciences, Raichur-584104, Karnataka, India
  • A. G. SREENIVAS Department of Agricultural Entomology and Head Centre for Agro- climatic Studies, University of Agricultural Sciences, Raichur-584104, Karnataka, India
  • N. SUSHILA Department of Agricultural Entomology, University of Agricultural Sciences, Raichur-584104, Karnataka, India
  • D. K. HADIMANI Department of Agricultural Entomology, University of Agricultural Sciences, Raichur-584104, Karnataka, India
  • R. V. BELADHADI Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, Raichur-584104, Karnataka, India

DOI:

https://doi.org/10.54386/jam.v24i4.1940

Keywords:

Cowpea, eCO2 and temperature, Growth and development, Maruca vitrata, phytochemistry

Abstract

Climate change has a widespread influence on agricultural productivity and relies upon the fact that responses vary between crops. Any changes in the nutritional quality of the host plant will have direct influences on associated insect pests and the damage that it causes. In this context, a study was conducted to measure the impact of elevated CO2 and temperature on the growth and development of cowpea (C3 plant) and its herbivore pod borer, Maruca vitrata (Fabricius) under open top chambers at the Center for Agro-climatic Studies, UAS, Raichur, Karnataka. Elevated CO2 had a positive impact on cowpea growth by encouraging crop boom along with vital changes in its phytochemistry. The increased supply of CO2 resulted in higher concentrations of ‘C’ and C-based metabolites and chlorophyll (39.81 µg/cm2) and nitrogen balance index (104.52). However, ‘N’ and N-based compounds were reduced. Larvae fed upon such nutrient-deficient food increased their development period (36.07 ±0.42days) and compensatory feeding inflicting more damage (7.72 webbings/plant). Although the larvae consumed more food, it decreased the body weight of the larvae and pupae, which in turn decreased the percent moth emergence, ultimately decreasing the fecundity (60.09 ± 0.20/female) and fitness of the pest in the long run.

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Published

02-12-2022

How to Cite

MEGHA, A. G. SREENIVAS, N. SUSHILA, D. K. HADIMANI, & R. V. BELADHADI. (2022). Impact of climate change (elevated CO2 and temperature) on growth and development of cowpea pod borer, Maruca vitrata (Fabricius) (Lepidoptera: Crambidae) . Journal of Agrometeorology, 24(4), 393–398. https://doi.org/10.54386/jam.v24i4.1940

Issue

Vol. 24 No. 4 (2022): December

Section

Research Paper

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Copyright (c) 2022 MEGHA, A. G. Sreenivas, N. SUSHILA, D. K. HADIMANI, R. V. BELADHADI

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