Indian Journal of Entomology

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Population Dynamics of Mustard Aphid Lipaphis erysimi (Kaltenbach) and its Natural Enemies


Affiliations
1 Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University, Jobner), Jobner, Jaipur 303329, Rajasthan, India
 

A field experiment on the population dynamics of mustard aphid Lipaphis erysimi (Kaltenbach) and its natural enemies in Indian mustard Brassica juncea was conducted during 2016-17 and 2017-18. The peak infestation was observed in the 5th week of January (213.68 aphids/ 10 cm terminal shoot) and 4th week of January (168.80 aphids/ 10 cm terminal shoot) in the 2016-17 and 2017-18, respectively. The maximum temperature had significant negative effect (r= -0.64), while relative humidity exhibited a significant positive effect (r= 0.64); and minimum temperature and rainfall led to non-significant effect. The coccinellid predator Coccinella septempunctata L., revealed a significant positive correlation with aphid (r= 0.76 and 0.72), and a non-significant correlation was observed with weather parameters.

Keywords

Lipaphis erysimi, Brassica juncea, population dynamics, temperature, relative humidity, rainfall, Coccinella septempunctata, correlation coefficients.
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  • Population Dynamics of Mustard Aphid Lipaphis erysimi (Kaltenbach) and its Natural Enemies

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Authors

S. K. Dotasara
Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University, Jobner), Jobner, Jaipur 303329, Rajasthan, India
K. C. Kumawat
Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University, Jobner), Jobner, Jaipur 303329, Rajasthan, India
Dinesh Swami
Department of Entomology, SKN College of Agriculture (Sri Karan Narendra Agriculture University, Jobner), Jobner, Jaipur 303329, Rajasthan, India

Abstract


A field experiment on the population dynamics of mustard aphid Lipaphis erysimi (Kaltenbach) and its natural enemies in Indian mustard Brassica juncea was conducted during 2016-17 and 2017-18. The peak infestation was observed in the 5th week of January (213.68 aphids/ 10 cm terminal shoot) and 4th week of January (168.80 aphids/ 10 cm terminal shoot) in the 2016-17 and 2017-18, respectively. The maximum temperature had significant negative effect (r= -0.64), while relative humidity exhibited a significant positive effect (r= 0.64); and minimum temperature and rainfall led to non-significant effect. The coccinellid predator Coccinella septempunctata L., revealed a significant positive correlation with aphid (r= 0.76 and 0.72), and a non-significant correlation was observed with weather parameters.

Keywords


Lipaphis erysimi, Brassica juncea, population dynamics, temperature, relative humidity, rainfall, Coccinella septempunctata, correlation coefficients.

References





DOI: https://doi.org/10.55446/IJE.2021.10