Seasonal occurrence of major defoliators of castor in Tamil Nadu: Seasonal occurrence of major defoliators of castor in Tamil Nadu

P A SARAVANAN; S GEETHA; M SENTHILKUMAR; V RAVICHANDRAN; P VEERAMANI; P ARUTCHENTHIL; S R VENKATACHALAM; S MANICKAM; P DURAIMURUGAN

doi:10.56739/0gdfe327

Authors

P A SARAVANAN Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030
S GEETHA Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030
M SENTHILKUMAR Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030
V RAVICHANDRAN Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030
P VEERAMANI Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030
P ARUTCHENTHIL Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030
S R VENKATACHALAM Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030
S MANICKAM Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030
P DURAIMURUGAN Tapioca and Castor Research Station, Tamil Nadu Agricultural University, Yethapur - 636 119 *Principal Scientist, ICAR - IIOR, Hyderabad -500 030

https://doi.org/10.56739/0gdfe327

Keywords:

Castor, Defoliators, Seasonal occurrence

Abstract

Castor is a non-edible oil bearing crop adapted to dry lands of tropics and semi-arid tropics. The seasonal occurrence of major defoliators viz., semilooper, Spodoptera and hairy caterpillars in castor was recorded continuously for last ten years (2012-2022) at Tapioca and Castor Research Station, Yethapur. The results revealed that Spodoptera litura was the major defoliator with a mean population of 4.3 larva/plant /year followed by semilooper and hairy caterpillar with 1.74 larva/plant/year and 1.44 larva/plant/year respectively. The maximum population of defoliators was recorded every year during 43rd to 49th standard weeks (October, November).

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References

Basappa H and Lingappa S. 2001. Studies on damage potential of Achaea janata at different phenological states of castor. Indian Journal of Plant Protection, 29: 17-24.

Rao M S, Rama Rao C A, Srinivas K, Pratibha G, Vidya Sekhar S M, Sree Vani G, Venkatswarlu B. 2012. Intercropping for management of insect pests of castor, Ricinus communis in the semi–arid tropics of India. Journal of Insect Science, 12:14 DOI: https://doi.org/10.1673/031.012.1401

Seasonal occurrence of major defoliators of castor in Tamil Nadu