An experiment was laid out with two treatments viz., unprotected and protected plot with plot size of 100 m2 each and further each treatment was divided into 13 quadrates with 30 X 10 cm spacing in Randomised Block Design (RBD). Results revealed that the avoidable reduction in plant height, number of branches per plant, pods per plant, number of seeds per pod due to insecticides application is , , and per cent respectively and a significantly higher yield was obtained in protected plots . 1028 kg ha-1 , while, comparatively low yield . 759 kg ha-1 was recorded from unprotected plots. The yield increased in protected plots over unprotected was 269 kg ha-1 . per cent. The avoidable yield loss was per cent by spraying of insecticides . monocrotophos 36% SC and fipronil 5% SC at ten days intervals against sucking pests viz., whiteflies, thrips, aphids and leafhoppers in blackgram. | Estimation of avoidable yield loss due to sucking pest complex in blackgram
