author(s)
Paramasiva I, Rajasekhar P, Harathi PN and Vineetha U

abstract
A field study was conducted to assess the effect of organic manures on the incidence of insect pest on rice. Recommended dose of chemical fertilizers were applied as a check. The experiment was set out in a randomized block design (RBD) with seven treatments comprising 15 t/ha of FYM, 7.5 t/ha of vermicompost, 2 t/ha of neemcake, 4 t/ha of poultry manure, 12 t/ha of pressmud, 3 t/ha of karanj cake and Recommended Dose of Fertilizers (RDF). Each treatment was replicated four times. Organically manured plots showed significant (P<0.05) decrease in gallmidge and leaf folder incidence compared with the check. The gallmidge incidence was ranged from 6.61 to 9.25% with the organic treatments and 12.94% with the check. The leaf folder incidence was ranged from 11.75 to 13.46% with the organic treatments and 22.70 with the check. The natural enemy populations significantly (P<0.01) increased with organic treatments compared with the check. The natural enemy population was ranged from 21.5 to 23.5 per hill with the organic treatments and 14.75 per hill with the check. Gross yield was also significantly highest in karanj cake and FYM amended plots (7119 and 6651 kg/ha, respectively) compared with RDF amended plots (6485).