Indian Journal of Entomology

The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader).

If you would like more information about how to print, save, and work with PDFs, Highwire Press provides a helpful Frequently Asked Questions about PDFs.

Alternatively, you can download the PDF file directly to your computer, from where it can be opened using a PDF reader. To download the PDF, click the Download link above.

Fullscreen Fullscreen Off


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.
User
Notifications
Font Size