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Vol. 11, Issue 6 (2022)

Control of Cyperus rotundus L. (Purple nutsedge) and annual weeds in Spring Maize (Zea mays L.) with halosulfuron-methyl and other weed control methods

Author(s):
Kanchan Thakur
Abstract:
The field experiment entitled “Control of Cyperus rotundus L. (Purple nutsedge) and annual weeds in Spring Maize (Zea mays L.) with halosulfuron-methyl and other weed control methodswas conducted during Spring season of 2021 at LPU Research Farm, Phagwara, Punjab. The experimental trial was conducted in Radomised Block Design with 15 treatments and 4 replications. The treatments were post-emergence application of halosulfuron-methyl from 45 g/ha, 52.5 g/ha, 60 g/ha, 67.5 g/ha, 75 g/ha,82.5 g/ha, 90 g/ha (T1 to T7), earthing up (T8), 2,4-D amine 0.58 kg/ha as post-em (T9), atrazine + pendimethalin (1.0 kg + 0.75 kg/ha) as pre-em (T10), tembotrione 110 g/ha as post-em (T11), black plastic mulch (T12), atrazine band (0.33 kg/ha) + straw mulch (T13), two hand weedings (T14), unweeded (control) (T15). From T1 to T9 pre-em application of atrazine + pendimethalin (1.0 kg + 0.75 kg/ha) was done to encourage growth of Cyperus rotundus by controlling annual weeds. The weed count per sq. m and dry matter of Cyperus rotundus recorded to be significantly less in post-em. application of halosulfuron-methyl from 67.5 g/ha to 90 g/ha, 2,4-D amine @ 0.58 kg/ha and black plastic mulch than all other treatments. Also these treatments recorded less dry matter accumulation among all other treatments. The periodic annual weed count (per sq. m) and dry matter accumulation in treatment of 2,4-D amine and tembotrione 110 g/ha recorded to be less and at par with all other weed control treatments except unweeded (control). Also unweeded (control) recorded higher dry matter accumulation by annual weeds than all other treatments. The plant height and dry matter accumulation/plant were significantly higher under the treatments of halosulfuron from 67.5 g/ha to 90 g/ha, 2,4-D amine and black plastic mulch. Significantly more number of leaves per plant were found in treatments of halosulfuron from 67.5 g/ha to 90 g/ha, 2,4-D amine and black plastic mulch than unweeded (control). The number of cobs/plant, cob girth (cm) and test weight recorded to be more in treatments of halosulfuron from 67.5 g/ha to 90 g/ha, 2,4-D amine and black plastic mulch. Significantly highest grain yield was recorded in plots treated with halosulfuron @ 90, 82.5, 75 and 62.5 g/ha (80.6 q/ha, 80.1 q/ha, 78.0 q/ha and 76.2 q/ha resp.) followed by 2,4-D amine (75.0 q/ha) and black plastic mulch (74.6 q/ha). The percent increase of grain yield over control in halosulfuron @ 90, 82.5, 75 and 62.5 g/ha was found to be 42.9%, 42.6%, 41.0% and 39.6% respectively).
Pages: 137-140  |  430 Views  222 Downloads


The Pharma Innovation Journal
How to cite this article:
Kanchan Thakur. Control of Cyperus rotundus L. (Purple nutsedge) and annual weeds in Spring Maize (Zea mays L.) with halosulfuron-methyl and other weed control methods. Pharma Innovation 2022;11(6):137-140.

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