ABSTRACT
Efficacy of any given foliar-sprayed pesticide is primarily determined by the amount of deposition on the leaves and subsequently penetrates into the target plants. The spray deposition and pesticide penetration are much influenced by the characteristics of the spray solution, plant surface, and sprayer operation. Forty-day-old rice seedlings were transplanted to the ordinary paddy field and grown to the treatment stage. For spray-cultivar-spacing interaction studies, three varieties differing in canopy type, Nongbaek-droopy japonica, Seonam-intermediate japonica, and Milyang 23-erect indica × japonica, were transplanted at three planting density levels, 30 × 30 cm, 21.5 × 21.5 cm, and 15 × 15 cm hill distances with three plants per hill. Rice leaf-blades at 50 g were harvested, washed with distilled water to remove any extraneous dirt, and allowed to wilt slightly to assure stomatal closure. The leaves were dipped in 500 ml of chloroform for 30 sec, three times successively.
