EFFECT OF PRE AND POST EMERGENCE HERBICIDES ON WEED DYNAMICS IN ONION (Allium cepa L.) CV.N-53


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Authors

  • M.VENKATESWARA REDDY,K.UMAJYOTHI, P.SYAM SUNDAR REDDY and K.SASIKALA

Abstract

A field experiment was conducted to find out best weed management practices in onion (Allium cepa L.,) during rabi
2011-12 and 2012-13. The experiment was laid out in Randomized block design with three replications.Weed population, weed
dry matter , weed control efficiency and weed index were significantly influenced by weed management practices. Weed
population and weed dry matter accumulation were significantly reduced with application of pre emergence herbicides coupled
with Quizalofop ethyl @ 75 g a.i / ha as post emergence application (20 DAT) compared with weedy check during both the years
of investigation. Application of pendimethalin and oxyflourfen supplemented with Quizalofop ethyl @ 75 g a.i / ha as post
emergence found to be as good as hand weeding thrice on bulb yield and weed dynamics. Though Imazethapyr @ 100 g a.i / ha
as post emergence application (20 DAT ) effectively controls the weeds and reduces weed dry matter compared to weedy check
but poor yield was recorded due to extremely phytotoxic to the Onion.

References

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Submitted

2017-02-19

Published

2017-02-19

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EFFECT OF PRE AND POST EMERGENCE HERBICIDES ON WEED DYNAMICS IN ONION (Allium cepa L.) CV.N-53. (2017). The Journal of Research, PJTSAU, 43(4). https://epubs.icar.org.in/index.php/TJRP/article/view/67891