Study of Hygienic practices of street food vendors in ... - Shiats.edu.in

The Allahabad Farmer Vol. LXVIII, January - 2013 No. 2In-situ efficacy of Trichoderma harzianum and chemicalpesticides to control wilt of pigeonpea(Cajanus cajan L.)Yojna Lal * and Sobita Simon **ABSTRACTPigeonpea (Cajanus cajan L.Millsp.) is an important pulse crop cultivated inalmost every states of India. Yield of Pigeonpea is significantly reduced due towilt disease caused by Fusarium oxysporum f sp udum. Application of chemicalpesticides has not solve the problem to desired extent, therefore an attempt wasmade for effective control of Fusarium oxysporum f sp. udum (in vivo) bybiological control agent Trichoderma harzianum and chemical pesticides. Aftertesting the compatibility of chemical pesticides and Trichoderma in laboratorydifferent treatment combinations were applied in field and it was observed thatbiological control agent was most effective in managing wilt disease over check.It also helps to increase the seed yield. The minimum wilt disease intensity wasregistered with the application of Trichoderma harzianum + Carboxin (22.21%)along with highest seed yield. It was followed by Trichoderma harzianum +Copper oxychloride, Trichoderma harzianum + Captan and Trichodermaharzianum + Thiram. Whereas, in control highest disease incidence wasobserved. All the treatment combinations restrained the wilt disease incidencesignificantly lower than that of control and enhanced the plant growth in fieldconditions. The population of Fusarium oxysporum f sp. udum was found to bemarkedly reduced when the antagonists were applied in the soil. The studyestablishes that most pronounced effect was achieved by integratingTrichoderma harzianum with Carboxin, Copper oxychloride, Captan and Thiramto control the wilt causal organism under in vivo conditions.Keywords : Wilt, Trichoderma, Fusarium, Disease incidence, Pigeonpea*Assistant Professor, ** Professor & HeadDepartment of Plant Protection, SHIATS, Allahabad – 211007 (U.P.)57