Author(s):

Shweta Gupta, PK Sharma, Sudesh Kumar, Surendra Singh, Shailendra Singh and HL Yadav

Abstract: The field experiment was conducted at research farm, RARI, Durga Pura for two consecutive years during Rabi seasons 2014-15 and 2015-16 on loamy sand soil. The twenty four treatment combinations consisting of 3 fertility levels {100% RDF; 100% RDF+K+Zn and 125% (RDF+K +Zn)} and 8 herbicides (Weedy check, Weed free, Pendimethalin 30 EC, Pendimethalin 38.7 CS, Pyrazosulfuron-ethyl 10 WP, Oxadiargyl 6 EC, Propaquizafop 10% EC and Fluazifop-p-butyl 13.4% EC were tested in factorial randomized block design with three replications. Results showed that, after weed free and weedy check, minimum phytotoxicity rating on crops was observed in pendimethalin 30 EC pre-emergence @ 750g a.i./ha treatment and maximum phytotoxicity was observed in pyrazosulfuron-ethyl 10 WP pre-emergence @ 150g a.i./ha treatment, however maximum weed control rating, after weed free was observed in pendimethalin 38.7 CS pre-emergence @ 750g a.i./ha treatment. Plant height and number of branches per plant at 30 DAS increases with increase in fertility levels. So, the maximum pooled plant height and number of branches per plant were recorded under 125% (RDF + K + Zn) treatment. Plant height of all the treatments were significantly superior over pyrazosulfuron-ethyl 10 WP pre-emergence @ 150g a.i. /ha treatment at 30 DAS. There was no significant variation in plant height was recorded in between other herbicidal treatments at 30 DAS. No significant variation due to herbicides was found in number of branches per plant. Maximum seed and stover yields were obtained under weed free, which was at par with pendimethalin 38.7 CS @ 750g a.i./ha. The seed and stover yields were significantly higher in fertility level 125% (RDF+K+Zn).

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