Evaluation of Systemic Insecticides for Control of Rice Tungro. V. D. Shukla, Research Scholar, Department of Plant Pathology, Central Rice Research Institute, Cuttack-753006, India. A. Anjaneyulu, Virologist, Department of Plant Pathology, Central Rice Research Institute, Cuttack-753006, India. Plant Dis. 64:790-792. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1980. DOI: 10.1094/PD-64-790.

Of seven granular systemic insecticides—carbaryl plus gamma isomer of hexachlorocyclohexane (HCH), carbofuran, disulfoton, fensulfothion, mephosfolan, phorate, and thiodemeton—tested under field conditions, carbofuran at 2 kg a.i./ha effectively controlled rice tungro virus and its vector, Nephotettix virescens, in susceptible rice cultivar Taichung Native 1. Carbofuran at 1 and 2 kg a.i./ha and fensulfothion at 2 kg a.i./ha effectively controlled the disease in the less susceptible cultivar Pankaj. Treatment with these insecticides also increased plant height, 1,000-grain weight, and grain yield relative to other insecticides and control. Rate of infection was strongly negatively correlated with plant height and grain yield in both cultivars; plant height and grain yield were positively correlated.