Integrated Management of Root Knot Nematode in Rice

Abstract

Rice is one of the most important food crops in the world r.nd fonns tit\.~ staple food for more than half of the global population. In India, rice is extensively grown r.nd occupies about 23.3% of the gross cropped area of the country. Rice in India is rainfed and frequently exposed to several biotic and abiotic stresses. Among the biotic stresses rice root-knot nematode, Meloidogyne gra1ninitola (Gold, n and Birt.•hfieldj causing rice root knot disease has emerged as a major pest throughout the \vorld due to its broa..i host range and ability 0f causing potential yield loss. To prevent yield losses and to improve productivity, it is nt!c~ssary to tind out the tffective sustainable management strategy. In present investigation bio-agents (Trichodenua spp. and Pseua'o1nonas fluorescence) ~ organic amendment (FYM, vennicompost and poultry manure) and corbofuran \vere used to evaluate tt.eir effectivene.;;s on plant gro\vth and management of rice root knot nen1atode-. ln pot expt riment bio-ag~nts ( Tricho,ierma Sp;J. and Pseudonronas fluorescence) were used alone and in con1binatiou f0r the rnanagen1ent oft ice root k !10t nematode. Efl'ect of bio-agent was compared with the corbofuran and untreat~.:d contro ,. It was ohsen \!d th:tt at th :!0 Di\S, minimum disease incidence and galls/plant (20% and 2.16) were observed in carbofuran@'0.3gnllpot folio" ed by Trichodenna spp@l Sgmlkg +Pseudon1onas jlourescense@ 15gtn/kg \Vith :..6.67~~ and 2.3.) r~spect i\'ely. At the .tO DAS, rninimum disease incidence and gaJls/plant ( 40o/o) were obser >'ed in Cdrbofltran @ 0.3gnl pot and Trichodern.1a spp @ I Og1n ·g +Pseudomonas jlourcscense I Ogn1/kg, ~·hereas n1inin1un1 g'dl s/plant (·L~ 3 ) wa-. observed in cnrbo furnn @ 0.3gnl/pot followed by Trichodenna spp@ 15gm/kg +Pst!udon1ona~ .J lourescense ISgn1/kg ( 4. :50). ~1axilnun~ di sease incid~ n e and galls/root systent \Vith 73.33o/o and 6.00 at tlte !0 DA) ·.vhile 100% and S ~iO at 40 DA \\'e:~ " corded unlr~Jted control respectively. In another pot experiment, organi <' aant.::!ndment (FY ~ l, vennic'-'lllp"):,;t and pouhry 11nanure) "er~ tested separately and in combination. In this experirnent ,\t the 35 DA n1inirnu1n di eas .incid n e ('16.66%) \\ , "' observed in pots \Vhich were amended \\ ith FY~ (+, em1iC\)n1p0st-1 poultry rnf!n tn~e, vc:m1i onlpo-t+pouhry ruanure and FYM+ poultry n1anure but at 70 D.A.. mi nin1un1 diseas~ in id n e ( .3 %) " s re oroed in FYM+vermicornpost-rpoultry manure. l\1ini •nunl galls/pt nt nnd 9.00) :re o~d d in FYl\1+vernticompost+poultry n1anure