Submitted to: Fungicide and Nematocide Tests
Publication Type: Peer reviewed journal
Publication Acceptance Date: 3/1/2005
Publication Date: 5/1/2005
Citation: Chen, W., Paulitz, T.C., Mcphee, K.E., Muehlbauer, F.J. 2005. Field evaluation of seed treatment fungicides for control of root rot and damping-off on chickpea, 2004. Fungicide and Nematocide Tests. 60:ST006. Interpretive Summary: Five seedtreatments for chickpea seeds were evaluated for their efficacy in preventing damping-off and root rot were evaluated at two locations in Pullman, Wa and Genesee, ID. All treatments including the standard treatment increased stand counts over the untreated control at both locations, and no difference among the treatments were found. However, the treatments did not significantly increase yield over the untreated control at either location.
Technical Abstract: Chickpea seeds, particularly large kabuli-seed type, are always treated before planting to control damping-off and root rot. The traditional seed treatment includes Apron for controlling Oomycete pathogens, and Mertect for controlling Fusarium spp. and Rhizoctonia solani that cause damping-off and root rot. Since 2002 we observed elevated levels of root rot of chickpea showing symptoms resembling Rhizoctonia root rot in cultivar 'Spanish White'. R. solani was isolated from diseased plants. In 2004, we evaluated five fungicide treatments for their effectiveness in controlling damping-off and root rot caused Fusarium spp. and R. solani. The treatments included an untreated control, a standard treatment (Apron XL LS, 0.16 fl oz and Mertect LSP, 6 fl oz per 100 lb); Maxim (standard treatment plus Maxim, 0.04 fl oz per 100 lb); Protégé (standard treatment plus Protégé, 0.375 fl oz per 100 lb); Blocker (standard treatment plus Blocker 10G, 18 lb per A), and Kodiak (Captan 400, 2.5 fl oz, Allegiance, 0.75 fl oz, and Kodiak, 0.125 oz per 100 lb). In the Kodiak treatment, Captan and Allegiance replaced Apron and Mertect in the standard treatment. All the treatments except Blocker 10G were coated onto the seeds less than one week before planting. The Blocker 10G in pellet form was mixed with standard-treated seeds at planting. Exactly 200 seeds of cultivar 'Spanish White' were planted onto each plot (5 ft by 12 ft) on 31 Mar on a farm near Walla Walla, WA, and on 25 Mar on a farm near Genesee, ID using a completely randomized block design with four replications. Plant stands were counted on 14 May on both locations. Plots were harvested for grain yields on 18 Aug at the Walla Walla location and on 30 Aug at the Genesee location. All treatments including the standard treatment increased stand counts over the untreated control at both locations, and no difference among the treatments were found. However, the treatments did not significantly increase yield over the untreated control at either location.