Studies on population dynamics of key pests of cotton

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Published: Jul 15, 2015
Keywords:
Population dynamics Cotton Chrysoperla carnea Lady bird beetles

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Nagendra, S.
1Department of Entomology, Marathwada Agricultural University, Parbhani, Maharashtra, India, 2 Agriculture Officer, Agriculture Department, Mysore, Karnataka, India.

Abstract

The present investigation was aimed to study the population dynamics of key pests of cotton. The highest population of aphids, jassids, thrips, bollworm eggs and larval population of bollworms were recorded in last week of August, 3rd week of September, last week of August, mid September and last week in November, respectively in chemical fertilizer (CF) plot.  Whereas, the highest population of whitefly was observed in CF plot and CF + farm yard manure (FYM) plot. Chrysoperla carnea and lady bird beetles were considered for recording their population dynamics. The highest population of Chrysoperla and lady bird beetles were recorded in CF and CF + FYM plots during mid August and mid September. It is clearly evident from the present investigations that the population of most of the sucking pests was maximum during the initial plant growth period and it decreased towards the later crop growth stages.

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How to Cite
Nagendra, S. (2015). Studies on population dynamics of key pests of cotton. International Journal of Agricultural Technology, 11(5), 1161–1176. retrieved from https://li04.tci-thaijo.org/index.php/IJAT/article/view/6441
Issue
Vol. 11 No. 5 (2015): July
Section
Original Study
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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