Vol. 5 No. 2
Control of late blight (Phytophthora infestans) disease of tomato in the plains of West Bengal.
Author(s): S. DEBNATH AND P. S. NATH
Abstract: An experiment was conducted during two consecutive years of 2007-08 and 2008-09 at Instructional Farm of BCKV located at Mohanpur, Nadia with an objective to evaluate the efficacy of newly released systemic fungicides for the control of late blight of Tomato in the plains of West Bengal. Infinito 68.75% SC [Fluopicolide 6.25% @ 93.8 g ai/ha + Propamocarb hydrochloride 62.5% @ 937.5 g ai/ha] @ 1500 g/ha showed lowest late blight disease incidence in tomato which is closely followed by the mixture formulation of Cymoxahil 8% [@ 120 g ai/ha + Mancozeb 64%- 72 WP ]@ 960 g ai/ha at 1500 g/ha. Single application of Fluopicolide 48% SC @ 96 g ai/ha at 200 g /ha and Propamocarb hydrochloride 72.2% SL @ 902.5 g ai/ha at 1250 g/ha recorded significantly higher leaf blight incidence. However, disease severity percentage was found lowest in a mixture formulation of Cymoxanil 8% @ 120 g ai/ha + Mancozeb 64% @ 960 g ai/ha which was statistically at per with Infinito 68.75% SC (Fluopicolide 6.25% @ 93.8 g ai/ha + Propamocarb hydrochloride 62.5% @ 937.5 g ai/ha) @ 1500 g/ha. Lower late blight disease incidence and highest fruit yield of tomato was obtained with the application of infinito 68.75 % SC @ 1500 g/ha.
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