Influence of elevated temperature on the fitness of Diamondback moth, Plutella xylostella (L.) in cauliflower
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Published:2021-07-01
Issue:4(SI)
Volume:42
Page:1106-1113
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ISSN:0254-8704
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Container-title:Journal of Environmental Biology
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language:
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Short-container-title:JEB
Author:
Haripriya K., ,Kennedy J.S.,Geethalakshmi V.,Rajabaskar D., , ,
Abstract
Aim: To understand the effect of elevated temperature on the bionomics and fitness parameters of Plutella xylostella which would help in predicting the population growth rates and formulating appropriate management tactics. Methodology: In the present investigation, the fitness parameters of diamondback moth were studied at six different temperatures (31, 32, 33, 34, 35 and 36°C) in cauliflower in Open Top Chambers. Observations were recorded on the survival, longevity and fecundity at daily interval. The raw data on bionomics and life table parameters were analyzed using TWO-SEX- MS chart. Results: The total life cycle of P. xylostella was longer at 31°C and it declined with increasing temperatures. However, P. xylostella did not complete its development at 35 and 36 °C. The intrinsic rate of increase (rm) increased from 0.22 at 31°C to 0.28 at elevated temperature of 34°C. Temperature also had a significant effect on the net reproductive rate (R0), Gross Reproductive Rate (GRR) and finite rate of increase (λ). Interpretation: The fitness parameters will help to predict the change that occur in P. xylostella population due to climate change and global warming.
Publisher
Triveni Enterprises
Subject
Health, Toxicology and Mutagenesis,Toxicology,Environmental Engineering