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Effect of Different Doses of Kite 25 Ec on Weed Control in Onion Field

M. M. Karim
SO
Agronomy Division, BARI

M.M. Kamal
SO
RARS, Rahamatpur, Barisal

Abstract/ Executive Summary:

The experiment was conducted at the research field of Agronomy Division, Joydebpur, Gazipur during rabi season of 2012 and RARS, Rahamatpur Barisal during 2013 to find out the optimum rate of herbicide to control weeds in onion field for getting higher yield. The treatments were: 1) Spraying Kite25 EC 750 ml/ha at 2-4 leaf stage of weed (LSW), 2) Spraying Kite 25 EC @ 1000 ml/ha spray at 2-4 LSW, 3) Spraying Kite 25 EC 1250 ml/ha spray at 2-4 LSW, 4) 2 hand weeding at15 and 30 DAT and 5) Control. Among the weed species, Bothua, (Chenopodium album) Shama (Echinochloa crusgalli), Helencha (Jussiaea repens), Mutha, (Cyperus rotundus), Durba (Cynodon dactylon),were dominant in onion field. The result showed that Kite 25 EC treated plot controlled (83-100%) broad leaf (Chenopoduim album) as well as other broad leaf weeds eg. (Heliotropium indicum). The highest bulb yield (9.06 t/ha) at joydebpur and 7.59 t/ha at Barisal was obtained from T₂ treatment and it was statistically identical with T₃ treatment. The lowest yield (6.81 t/ha) at Joydebpur and 4.48 t/ha at Barisal was recorded in T₅ treatment. The highest gross margin and BCR was also obtained from the treatment (T₂) at both the locations. From the above findings it may be concluded that spraying herbicide Kite 25 EC @ 1000ml /ha, or 1250 ml/ha at 2-4 leaf stage of weed in controlling Chenopodium album as well as other broad leaf eg.(Heliotropium indicum, Physalis heterophylla) is suitable for higher yield of onion.

Keywords: Herbicide, Weed, Onion

Location: Joydebpur, Gazipur and RARS, Rahamatpur, Barisal

Start Date: 00-00-2012

End Date: 00-00-2013

Program Area: Pest Management

Commodity: Onion

Objectives:

To find out the optimum dose of Kite 25 EC herbicide for controlling weeds in onion field.

Methodology:

The experiment was conducted at the Agronomy Division research field of BARI, Gazipur and RARS, Barisal during rabi season of 2012-2013. The experiment was carried out in a randomized complete block design with three replications. The treatments were: 1) Spraying Kite 25 EC 750 ml/ha at 2-4 leaf stage of weed (LSP) (2) Spraying Kite 25 EC @ 1000 ml/ha spray at 2.4 (LSP) (3) Spraying Kite 25 EC 1250 ml/ha spray at 2.4 (LSP) (4) Two hand weeding at 15 and 30 DAT and (5) Control. Spraying of herbicide was done by spray machine, as much as possible avoiding the contact with the onion seedling. The unit plot size was 4.8m x 4 m. Taherpuri variety of onion was used as the test crop. The crop was transplanted on 20 December maintaining the spacing of 40 cm x 15 cm at both the locations. The crop was fertilized with N₉₀P₄₅ K₁₂₀ Zn₄S₃₀B₁kg/ha in the form of urea, TSP, MoP, gypsum, zinc sulphate and boric acid, respectively. Weed samples were collected using 50 cm x 50 cm quadrates from randomly selected three places from each plot at 15 days interval to record number of weed, species of weed and dry weight of weeds. Weed control efficiency (WCE) was calculated using the formula: WCE (%) = (A-B/A) x 100 where A= Dry weight of weeds in no weeding plots and B= Dry weight of weeds in treated plots. The crop was harvested on 5 April 2012 at Joydevpur and 15 April at Barisal. Yield and yield contributing characters were recorded and analyzed statically and mean separations were done by LSD test.

Source of Information: Annual Research Report 2013-2014, Agronomy Division, BARI, Gazipur.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 20,000/-

Total Budget (Tk.) : 20,000/-

Achievement/Findings:

From the above findings it may be concluded that spraying herbicide Kite 25 EC @ 1000 ml /ha, or 1250 ml/ha at 2-4 leaf stage of weed in controlling Chenopodium album as well as other broad leaf eg. (Heliotropium indicum, Physalis heterophylla) for high yield of onion.

Knowledge Management: Report/Proceedings