Evaluation of herbicide resistance in Chenopodium spp. and management in wheat
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Date
2019
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CCSHAU
Abstract
Chenopodium album is most dominant broadleaf weed of wheat and other Rabi crops.
Complaints of poor efficacy of several herbicides against C. album and C. murale have been reported
recently from farmer fields of different locations of Haryana state. Therefore, there is need to know
about the current status of herbicide resistance/poor efficacy of different herbicides against C. album.
The present investigation entitled, “Evaluation of herbicide resistance in Chenopodium spp. and
management in wheat” was conducted during the Rabi season of 2017-18 in the screen house of
Department of Agronomy, Chaudhary Charan Singh Haryana Agricultural University, Hisar (Haryana).
Pot experiment was conducted in completely randomized design, replicated thrice using different
herbicides namely metsulfuron, TOTAL, carfentrazone, LANFIDA, ATLANTIS, isoproturon, 2,4-D
amine and ester salt, Accord Plus, diflufenican, aclonifen + diflufenican, halauxifen + fluroxypyr,
aclonifen, halauxifen, pendimethalin and metribuzin applied at three doses (0.5X, X and 2.0X) in the
experiment as pre or post-emergence. Untreated pots were maintained as control for comparison. The
results in general indicated that Chenopodium populations have attained resistance against metsulfuron,
TOTAL, ATLANTIS and carfentrazone. Poor efficacy was observed with LANFIDA; however 2, 4-D
amine and ester salt, Accord Plus, diflufenican, aclonifen + diflufenican, aclonifen and halauxifen +
fluroxypyr were effective, some even at half of recommend dose. Higher value of plant height,
chlorophyll fluorescence, fresh weight and dry weight and lower value of EC was observed in the
herbicidal treatments showing poor efficacy against the test populations. The pre-emergence (PRE)
application of pendimethalin and metribuzin recorded complete control. Pendimethalin PRE and POE
application of other herbicides has already been recommended and promoted for the management of
Phalaris minor in wheat and can take care of Chenopodium populations. One single intervention may
provide management of complex weed flora infesting the wheat crop. The information collected from
this study will facilitate proactive management of herbicide resistance through sequential application of
PRE and POE herbicides and also using the compatible herbicide mixtures.
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