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Neem, Azadirachta indica A Juss. (Meliaceae) products viz., neem seed kernel exract (NSKE) (5%) , neem oil (3%) , neem leaf extract (3%) along with notchi Vitex negundo Linn. (Verbenaceae) leaf extract (3%) , periwinckle leaf extract (Catharanthus roseus Linn.) (Apocynaceae) (3%), palmarosa oil (Cymbopogaon maurtini Roxb.) (0.05%), jatropha oil (Jatropha carcus L. ) (1%) were evaluated against White Backed planthopper (WBPH) with different methods of application viz., seed treatment , seedling root dip and foliar spray. Percent survival was minimum in NSKE .Mean size, weight and growth index were also minimum in neem products. Insects made more probes in neem products. Honeydew excreted in NSKE treatment was also reduced.
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