Efficacy of botanical mixtures against bhendi shoot and fruit borer, earias vitella (fab.)
2003
Rao, N.S. | Rajendran, R. (Tamil Nadu Agricultural University, Madurai (India). Department of Agricultural Entomology)
A laboratory and field investigation was carried out to know the joint toxicity of neem with other botanical extracts. In the laboratory studies, neem (N) (Azadirachta indica) in combination with other botanical extracts viz,. sweet-flag (s) (Acorus calamus) and pungam (P) (Pongamia glabra) at 1:1:1: (NSP I), 2:1:1 (NSP II) and 3:1:1 (NSP III) (v/v) ratio was evaluated on oviposition and egg mortality of E. vitella. Among the treatments, botanical mixture i.e. NSP (I) @ 0.3% recorded improved efficacy over the application of neem alone in deterring the moths from oviposition and it was the best among the treatments in inhibition of egg hatching (66.78%). In the field evaluation, among the botanicals tested NSP (I) @ 0.42% was found superior in containing the damage caused by the shoot and fruit borer, which is comparable with endosulfan @0.07%. The highest yield of bhendi fruits was recorded in endosulfan (14.24 t/ha) followed by NSP (I) (13.27 t/ha) treated plots. The order of efficacy inreducing the shoot and fruit borer infestation in bhendi wa endosulfan @ 0.07%NSP (I) @ 0.42NSP (I) @0.3% NSKE 5% Neem Oil 3% NSP (I) @ 0.18% Neem @ 0.18%.
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