Population Dynamics of Leafhopper (Empoasca flavescens) and Thrips (Scirtothrips dorsalis) of Castor (Ricinus communis L.)

G. Madhuri; K. Sadaiah; P. Duraimurugan; V. Divya Rani; G. Eswara Reddy; G. Neelima; N. Nalini; M. Sujatha; G. Goverdhan

doi:10.9734/ijecc/2023/v13i113361

Population Dynamics of Leafhopper (Empoasca flavescens) and Thrips (Scirtothrips dorsalis) of Castor (Ricinus communis L.)

Full Article - PDF Review History

Published: 2023-11-01

DOI: 10.9734/ijecc/2023/v13i113361

Page: 2023-2029

Issue: 2023 - Volume 13 [Issue 11]

G. Madhuri *

Regional Agricultural Research Station, PJTSAU, Palem, Nagarkurnool District-509 215, Telangana, India.

K. Sadaiah

Regional Agricultural Research Station, PJTSAU, Palem, Nagarkurnool District-509 215, Telangana, India.

P. Duraimurugan

ICAR-Indian Institute of Oilseeds Research, Rajendranagar, Hyderabad-500030, Telangana, India.

V. Divya Rani

Regional Agricultural Research Station, PJTSAU, Palem, Nagarkurnool District-509 215, Telangana, India.

G. Eswara Reddy

Regional Agricultural Research Station, PJTSAU, Palem, Nagarkurnool District-509 215, Telangana, India.

G. Neelima

Regional Agricultural Research Station, PJTSAU, Palem, Nagarkurnool District-509 215, Telangana, India.

N. Nalini

Regional Agricultural Research Station, PJTSAU, Palem, Nagarkurnool District-509 215, Telangana, India.

M. Sujatha

Regional Agricultural Research Station, PJTSAU, Palem, Nagarkurnool District-509 215, Telangana, India.

G. Goverdhan

Regional Agricultural Research Station, PJTSAU, Palem, Nagarkurnool District-509 215, Telangana, India.

*Author to whom correspondence should be addressed.

Abstract

The experiment on population dynamics against leafhopper and thrips of castor,a field experiment was conducted during 2021 & 2022 on castor (Ricinus communis) at Regional Agricultural Research Station Palem, PJTSAU. The studies on population dynamics of leafhopper (Empoasca flavescens) revealed thatthe activity of leafhoppers was moderate to heavy with maximum of 120.8 leafhoppers/3 leaves/plant was recorded during the second fortnight of December (52 SMW, 24^th-31^st Dec). Leafhopper population had non-significant and negative correlation with maximum temperature (r = -0.24 and r = -0.29, respectively), whereas it had significant assocation and negative correlation with minimum temperature, morning relative humidity, evening relative humidity as well as rainfall (r = - 0.64 - 0.50, r=-0.61 and - 0.52, respectively). Thrips infestationwas observed from October first fortnight (40 SMW 1^st Oct -7^th Oct) to December second fortnight (52 SMW, 24^th-31^st Dec) with peak infestation 31.1 thrips/spike.Thrips population had non-significant and negative correlation with maximum temperature ( r = -0.29), whereas it had significant assocation and negative correlation with minimum temperature, morning relative humidity, evening relative humidity as well as rainfall (r = - 0.68, r= -0.55, r=-0.63 and, r=- 0.49 respectively). Leafhopper and thrips has significant association and positive correlation with sunshine hours (r=0.55 & r=0.51).

Keywords: Castor, leafhopper, thrips, weather, dynamics

How to Cite

Madhuri , G., Sadaiah , K., Duraimurugan , P., Rani , V. D., Reddy, G. E., Neelima , G., Nalini , N., Sujatha , M., & Goverdhan , G. (2023). Population Dynamics of Leafhopper (Empoasca flavescens) and Thrips (Scirtothrips dorsalis) of Castor (Ricinus communis L.). International Journal of Environment and Climate Change, 13(11), 2023–2029. https://doi.org/10.9734/ijecc/2023/v13i113361

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