Abstract

The effect of fertilizer treatments (O, N, NP and NPK doses in kg/ha) on growth, productivity, insect-pest and disease incidence on rise in Gangetic alluvial soil (Entisol) of West Bengal under rainfed condition was evaluated in 1987 and 1988. The balanced fertilisation made highest increment on plant height, number of tillers, but phosphate fertilisation along with nitrogen exerted marked effect on dry matter production at panicle initiation stage. Increased number of matured panicles/m² due to NPK fertilisation resulted in higher grain and straw yield. Phosphorus along with nitrogen showed significant effect on number of filled grains/panicle and test weight. Nitrogen either alone or coupled with phosphorus exhibited higher degree of incidence of gall midge and yellow stem borer but NPK lowered the incidence of rice bug, leaf folder, gall midge and yellow stem borer. NPK increased the bacterial leaf streak infestation significantly than either of N or NP treatments.

Keywords: Balanced Fertilisation, Dry Matter Accumulation, Insect-pest and Disease