SUITABILITY OF SHORT DURATION GRAIN COWPEA VARIETIES TO FIT IN NICHE BETWEEN WHEAT-RICE BASED CROPPING SYSTEM IN BIHARAnil Kumar, Shweta Rani, Sanjay Kumar, Ramesh Nath Gupta Aanand Kumar, Birendra Singh, Anjali Kumari
Six varieties of grain cowpea were evaluated for different agronomical characters in 2014 and 2015. Adequate variability was found for various agronomical characters. Data were taken on 50% flowering, plant height (cm), pod length (cm), number of pods per plant, number of seeds per pod, days to maturity, 100-seed weight (g), and grain yield per plot (g). Observations were also made incidence of major insect-pest and diseases. Out of six varieties, four varieties depicted cowpea yellow mosaic virus resistance (CYMV). Although, leaf and flower thrips and pod sucking insect problem appeared upto certain level that could be controlled by spray in propenophos @ 1 lit/ha at seedling stage and imidachloprid/cypermethridin @300- 400ml/ha at podding stage. Out of six grain cowpea varieties, four varieties of short duration (62-65 days) have the potential and therefore, promoted in niche between wheat-rice cropping system in different agroecological zones of Bihar state.
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