Performance of rice varieties against the rice blue beetle, Leptispa pygmaea Baly (Coleoptera:Chrysomelidae)
One hundred and five varieties / entries were screened for their field reaction against Leptispa pygmaea. None of the varieties was found to be completely resistant. Moderate resistance was observed in nine traditional Pattambi varieties viz., Ptb.3 (Eravanpandy), Ptb.4 (Vellari), Ptb.7 (Parambuvattan), Ptb.9 (Thavalakannan), Ptb.18 (Eravapandy), Ptb.19 (Athikkiraya), Ptb.20 (Vadakkan Chitteni), Ptb.25 (Thonnooran), Ptb.26 (Chenkayamma) and a short duration high yielding variety of Mannuthy (Hraswa) with a damage score of ‘3. The varieties MO 12, IET 17895 (UTR 57), Ptb.39 (Jyothi), Ptb.41 (Bharathy) and Varna were found to be highly susceptible to the pest with a damage score of ‘9’.
Author : K.Karthikeyan and Sosamma Jacob
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