Vol. 7, Issue 6 (2019)
Influence of silicon fertilization on the incidence of rice insect pests and diseases in Telangana
Author(s): Kasthuri Rajamani, BH Kumara, G Bhupal Raj and M Yakadri
Abstract: Most of the pest and disease control measures used by farmers affect the soil fertility and plant resistance, which together leads to high control costs and make the rice cultivation unfeasible. To address this, an experiment was carried out in two phases. In the first phase of the experiment, Si content is accessed in the rice index leaves by utilizing 133 varieties with a mean value of 2.50, 2.48, 2.51 and 2.43% at Jagtial, Warangal, Rajendranagar and Rudrur varietal rice display plots of Telangana. For the second phase of field experiment, one with high Si (JGL-3855) and another with low Si (RNR-2354) content genotypes were selected with sixteen treatmental combinations of Si and Nin strip plot design. Conjunctive application of N and Si to both genotypes, JGL-3855 recorded significantly higher grain and straw yields compared to RNR-2354, and among the different combinations of Si and N, application 160 kg N + 600 kg Si ha-1 recorded significantly higher grain and straw yields (7180 and 9693 kg ha-1) over control (5622 and 7197 kg ha-1). The incidence of pests and diseases was significantly higher with the application of increased N levels by 0, 80, 120 and160 kg ha-1alone when compared to the conjunctive use of N and Si. However, significant scaling down of menace was noticed in treatments wherever increased Si doses (0, 200, 400 and 600 kg ha-1) included.
Pages: 472-476 | 321 Views 67 Downloads
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How to cite this article:
Kasthuri Rajamani, BH Kumara, G Bhupal Raj, M Yakadri. Influence of silicon fertilization on the incidence of rice insect pests and diseases in Telangana. Int J Chem Stud 2019;7(6):472-476.
