摘要：Ten plant products were evaluated against Henosepilachna vigintioctopunctata. They were: Azadirachta indica
(Neem) leaf extract (@ 5.0 %), Calotropis gigantea leaf extract @ 5.0 %, Lantana camera leaf extract @ 5.0 %,
Neem cake extract @ 5.0 % neem oil @ 2.0 %, Nimbecidine.@ 2 ml /lit %, Pongamia glabra (Pungam) leaf extract
@ 5.0 %, Prosopis juliflora L. leaf extract @ 5.0 %, Vitex negundo(Notchi) L. leaf extract (@ 5.0 %), and Allium
sativum (Garlic) extract (@ 5.0 %. The standard check, carbaryl (Sevin 50 WP) (@ 0.1%) and an untreated check
were included. The plant products were able to bring about higher reduction in population of H.
vigintioctopunctata from 87.86 to 71.97 % on the third day after spray. However, the efficacy was reduced with
the increase in days after spray. Higher reduction in population of H. vigintioctopunctata was observed in neem
oil and was on a par with C. gigantea , Nimbecidine and L. camera ; P. glabra neem cake extract and V. negundo
stood next. However, the plant products were less effective than the standard check carbaryl but better than the
untreated check.
