Seasonal incidence and population dynamics of castor pests and their natural enemies in Tamil Nadu


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Seasonal incidence and population dynamics of castor pests and their natural enemies in Tamil Nadu

Authors

  • B GEETHA Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
  • M SENTHIL KUMAR Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
  • M DEIVAMANI Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu
  • S R VENKATACHALAM Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur-636 119, Tamil Nadu

https://doi.org/10.56739/jor.v37iSpecialissue.141026

Keywords:

Castor, Insect pests, Natural enemies, Population dynamics

Abstract

Seasonal occurrence of insect pests and natural enemies on castor recorded consecutively for four years (2015-
19 to 2018-19) showed that the sucking pests incidence was higher compared to defoliators and capsule borer. The peak incidence of leafhopper started from November to January in all the years with the peak population ranging from 24.8 to 84.5 leafhoppers/3 leaves/plant. Thrips population peaked during November and highest population of 432.8 thrips/spike was recorded during 2016-17. Whitefly population was recorded during December to January with peak population of 224.3/plant noticed in 2016-17. Defoliator population was recorded from October to November and the parasitisation of semilooper by Snellenius maculipennis was up to 66.6 per cent.

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References

Lakshminarayana M 2010. Eco-friendly management of insect pests of castor. In: Research and Development of Castor:

Present Status and Future Strategies, D M Hegde (Ed.), Directorate of Oilseeds Research, Hyderabad, pp. 141.

Madhuri C, Rao R G, Arjun R P and Srinivasa R V 2006. Incidence of lepidopteron pests of castor (Ricinus communis

L.). The Andhra Agricultural Journal, 56: 2-15. Naik M I,

Kumar M A A, Manjunatha M and Shivanna B T 2010. Survey for the pests of castor and natural enemies. Environment and Ecology, 28: 558-563.

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Submitted

2023-08-17

Published

2020-03-12

How to Cite

Seasonal incidence and population dynamics of castor pests and their natural enemies in Tamil Nadu: Seasonal incidence and population dynamics of castor pests and their natural enemies in Tamil Nadu. (2020). Journal of Oilseeds Research, 37(Specialissue). https://doi.org/10.56739/jor.v37iSpecialissue.141026