Weed Dynamics in Flue Cured Tobacco Crop as Influenced by Pre Transplant, Pre Emergence and Post Emergence Herbicides in Northern Light Soils of Andhra Pradesh

Author: MNVA Uma Mahesh*, K. Srinivasan, C.R. Chinnamuthu, S. Shanmugasundaram, C.N. Chandrasekhar and P. Srinivas

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Abstract

One of the major challenges in flue cured (FC) tobacco is achieving effective weed control during early growth stages. Creating weed free conditions to facilitate early growth is extremely critical, however due to peak agricultural activity during the establishment phase, availability of labour is a major constraint. Grasses, broad leaved weeds and sedges constitute the weed flora infesting tobacco. Dominant weed species are Echinochloa colona, Digitaria sanguinalis, Dactyloctenium aegyptium, Echinochloa crusgalli, Cleome viscosa, Amaranthus viridis, Cyperus compressus and Cyperus rotundus. Due to non-availability of herbicides for tobacco specific weed control, an effective weed management program could not be established. In the recent past, substantial developments happened in the introduction of new herbicide molecules. A two year field experiments were conducted at Peddpauram village of West Godavari district (Andhra Pradesh) during (Rabi) seasons of 2018-19 and 2019-20, to study

Keywords

Pre transplant herbicide, pre emergence herbicide, post emergence herbicide weed control efficiency, weed index and FC tobacco.