BIOEFFICACY OF HERBICIDES IN GROUNDNUT (Arachis hypogaea L.) + PIGEONPEA [Cajanus cajan (L.) Millsp.] (4:1) INTERCROPPING SYSTEM

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Date
2017-08-30
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UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
Abstract
A field experiment was conducted during kharif 2016-17 on clay loam soil at Agricultural College Farm, UAS Raichur with the view to find a suitable herbicide for groundnut + pigeonpea intercropping system. The experiment was laid out in RCBD comprising of twelve different weed management treatments. Among different weed management practices, application of pendimethalin 38.7 % CS @ 750 g ha-1 as (PE) fb imazethapyr + imazamox 70% WG@ 70 g ha-1 as (POE) at 20-25 DAS)+ IC at 45 DAS recorded lower weed index (11.7 and 5.45 in groundnut and pigeonpea, respectively) and higher weed control efficiency (47.74 %) at 60 DAS as compared to weedy check. Among different weed management practices, application of pendimethalin 38.7 % CS @ 750 g ha-1 PE fb imazethapyr + imazamox 70% WG@ 70 g ha-1 (POE) at 20-25 DAS)+ IC at 45 DAS recorded significantly higher plant height and dry matter production plant-1 at harvest (53.6, 131.1 cm and 34.09, 180 g plant-1 in groundnut and pigeonpea, respectively). The number of pods plant-1 (22.10 and 124.80), pod weight plant-1 (34.3 and 50.6 g plant-1) and test weight (41.9 and 15.4 g in groundnut and pigeonpea, respectively) was significantly higher with application of pendimethalin 38.7 % CS @ 750 g ha-1 PE fb imazethapyr + imazamox 70% WG@ 70 g ha-1 (POE) at 20-25 DAS) + IC at 45 DAS. Significantly higher pod and seed yield (1590 and 1301 kg ha-1 in groundnut and pigeonpea, respectively) was recorded with application of pendimethalin 38.7 % CS @ 750 g ha-1 PE fb imazethapyr + imazamox 70% WG@ 70 g ha-1 (POE) at 20-25 DAS)+ IC at 45 DAS. Weed free check recorded significantly higher net returns (Rs. 1,17,285 ha -1 ) and B:C ratio (4.44) followed by application of pendimethalin 38.7 % CS @ 750 g ha-1 PE fb imazethapyr + imazamox 70% WG@ 70 g ha-1 (POE) at 20-25 DAS)+ IC at 45 DAS( Rs.138045 ha-1 and 4.12,respectively).
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http://krishikosh.egranth.ac.in/handle/1/5810143022
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