Evaluation of new fungicides and insecticides for phytotoxicity and management of late leaf spot and rust in groundnut

Six fungicides and six insecticides were evaluated alone and in combination for phytotoxicity and also their effect on control of leaf spot and rust diseases of groundnut under field conditions during Kharif, 2012. Physical compatibility of insecticides and fungicides was recorded under in vitro conditions by taking observations on color, solubility, appearance, pH etc. Slight phytotoxicity symptoms were noticed in combinations viz T14: T1+T8 (Imidacloprid +Propiconazole); T26:T3+T8 (Thiodicarb + Propiconazole); T27: T3+T9 (Thiodicarb + Tebuconazole ) followed by T38:T5+T8 ( Novaluron + Propiconazole ) recorded as 24.9, 21.77,19.67,19.66%, respectively when compared to control. When fungicides and insecticides were evaluated against leaf spot and rust diseases in combination and alone, the treatment T40: T5+T10 (Novaluron + Difenoconazole) which recorded lowest percent disease index (PDI) 28% and 17.59% , respectively when compared to individual application.