Herbicide combinations for the management of complex weed flora in garlic (Allium sativum L.)
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Date
2022-12-16
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CSK HPKV, Palampur
Abstract
A field investigation was conducted at Experimental Farm of the Department of Vegetable
Science and Floriculture, CSK HPKV, Palampur during Rabi, 2021-22 to infer about the suitable pre/
post-emergence herbicide (s) or their combination for the management of complex weed flora in garlic
(Allium sativum L.). Soil of the experimental site was silty clay loam, acidic, medium in organic
carbon, low in available nitrogen, medium in available phosphorus and potassium. Twelve treatment
combinations namely, oxyfluorfen 150 g/ha (pre-emergence) fb quizalofop ethyl 60 g/ha (post emergence), oxyfluorfen 120 g/ha (pre-emergence) fb quizalofop ethyl 50 g/ha (post-emergence) + 1
HW, metribuzin 400 g/ha (pre-emergence) fb quizalofop ethyl 60 g/ha (post-emergence), metribuzin
320 g/ha (pre-emergence) fb quizalofop ethyl 50 g/ha (post-emergence) + 1 HW, imazethapyr 100
g/ha (pre-emergence) fb quizalofop ethyl 60 g/ha (post-emergence), imazethapyr 80 g/ha (pre emergence) fb quizalofop ethyl 50 g/ha (post-emergence) + 1 HW, pendimethalin 1500 g/ha (pre emergence) fb quizalofop ethyl 60 g/ha (post-emergence), pendimethalin 1200 g/ha (pre-emergence)
fb quizalofop ethyl 50 g/ha (post-emergence) + 1 HW, pendimethalin 1500 g/ha (pre-emergence) + 2
HW, hand weeding thrice, weed free ( 4 HW) and weedy check. The major weed flora observed in the
experimental field was comprised of Spergula arvensis (27.7%), Tulipa asiatica (22.6%), Coronopus
didymus (19.2%), Veronica sp. (8.4%) Euphorbia sp. (8.4%) and Phalaris minor (7.3%). Results of
the study revealed that Weed free (4 HW) and Oxyfluorfen 120 g/ha (pre-emergence) fb quizalofop
ethyl 50 g/ha (post-emergence) + 1 HW effectively reduced the count and dry matter of weed species.
Highest weed control efficiency of 86.19 per cent was obtained from weed free (4 HW) treatment
followed by 77.86 per cent with oxyfluorfen 120 g/ha (pre-emergence) fb quizalofop ethyl 50 g/ha
(post-emergence) + 1 HW. The treatment weed free (4 HW) also produced significantly higher bulb
yield (11.4 t/ha), higher gross (₹ 4,26,562) and net (₹ 3,76,763) returns due to weed control. Amongst
herbicidal treatments, oxyfluorfen 120 g/ha (pre-emergence) fb quizalofop ethyl 50 g/ha (post emergence) + 1 HW proved best as it resulted in significantly higher bulb yield (10.8 t/ha), gross (₹
3,84,433) and net (₹ 3,71,137) returns due to weed control. The treatment, oxyfluorfen 150 g/ha (pre emergence) fb quizalofop ethyl 60 g/ha (post-emergence) gave the highest marginal benefit cost ratio
(MBCR) of 58.16. Based on the results obtained from the study, it was concluded that the treatments,
weed free (4 HW) and oxyfluorfen 120 g/ha (pre-emergence) fb quizalofop ethyl 50 g/ha (post emergence) + 1 HW were the best options for obtaining higher bulb yield and management of complex
weed flora in garlic.