National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Experiments were carried out in two field conditions (induced drought and flood stress) to analyse the effect of fly ash on certain major pests of rice viz., Brown plant hopper, Green leaf hopper, stem borer. The population of these insects were assessed at regular intervals on plants imposed with treatments including fly ash, Silicate Solubilizing Bacteria (SSB), Farm yard manure (FYM), and graded levels of soil test based potassium. The results revealed that the combination of Fly ash, SSB, FYM, with graded level of soil test based potassium significantly reduced the incidence of Brown plant hopper, Green leaf hopper and stem borer as compared to untreated plots. The silicon content was analysed in the leaf blade and leaf sheath cum stem and it was negatively correlated with the insect population. As the age of the plant increased, silicon content proportionately increased in the plants at different growth stages. The main cause for the death of insects due to fly ash application was wearing of mandibles and main feeding organs of insects which resulted in functionless mandibles so that the insects of paddy die without food. Further, the incidence of major insects was negatively correlated with yield. Application of fly ash as a source of silica and potassium with SSB, FYM with STBK reduced the incidence of Brown plant hopper, Green leaf hopper, Stem borer and increased the yield in rice.
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