Population Dynamics of Red Ant Dorylus Orientalis in Potato Grown Under Flood Free/ Prone Conditions

Authors

  • Elangbam Bidyarani Devi Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam
  • Badal Bhattacharyya Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam
  • Sudhansu Bhagawati Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam

DOI:

https://doi.org/10.55446/IJE.2021.306

Keywords:

Dorylus orientalis, population dynamics, fixed plot survey, flood free/ prone, potato, temperature, relative humidity, soil temperature, evaporation rate

Abstract

Experiments were carried out in the farmer’s field at Jorhat during 2015-16 and 2016-17 to study the population dynamics of red ant Dorylus orientalis Westwood in potato crop. The incidence of D. orientalis was observed both under flood free/ and prone conditions in three villages each, during potato growing season. These data were correlated with weather factors. The effect on population buildup was studied with observations at fortnightly interval starting from 1st fortnight of October to 2nd fortnight of February through fixed plot surveys. The observations revealed that maximum incidence (36.5, 33.2 and 30.1; 35.2, 32.5 and 29.8/ pit) was observed in Charaibahi, Karangia and Hokai Khangia villages, respectively during the 1st fortnight of January. In contrast, in the flood prone villages, incidence was observed to be negligible. Correlation coefficients of incidence with weather factors revealed that minimum temperature, soil temperature (morning and evening) and evaporation rate show a significantly negative correlation; whereas relative humidity (RH) (morning and evening) exhibited significant positive correlation in flood free villages. In flood prone villages minimum temperature as well as morning soil temperature showed significant negative correlation (2015-16); in contrast, in flood prone villages, RH (morning and evening) showed significant positive correlation (2016-17).

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Published

2022-12-27

How to Cite

Bidyarani Devi, E. ., Bhattacharyya, . B. ., & Bhagawati, S. . (2022). Population Dynamics of Red Ant <i>Dorylus Orientalis</i> in Potato Grown Under Flood Free/ Prone Conditions. Indian Journal of Entomology, 84(4), 942–946. https://doi.org/10.55446/IJE.2021.306

Issue

Volume 84, Issue 4, December 2022

Section

Research Communications
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