The Economic Viability of Integrated Weed Management in Onion (Allium cepa L.) in Yemen

2016 ◽  
Vol 34 (3) ◽  
pp. 202-210
Author(s):  
A. A Bawazir ◽  
◽  
O.S Bin Shuaib ◽  
Keyword(s):  
Allium Cepa ◽  
Weed Management ◽  
Economic Viability ◽  
Integrated Weed Management ◽  
Allium Cepa L

Effect of Weed Management Techniques in kharif Onion (Allium cepa L.)

2018 ◽  
Vol 6 (2) ◽  
pp. 50
Author(s):  
R P S Shaktawat ◽  
Durga Singh ◽  
S P S Somvanshi ◽  
G S Kulmi ◽  
H P Singh
Keyword(s):  
Allium Cepa ◽  
Weed Management ◽  
Allium Cepa L ◽  
Management Techniques

Effectiveness of different weed control practices in onion (Allium cepa L.) crop

2020 ◽  
pp. 47-51
Author(s):  
Muhammad Nafees ◽  
Ishtiaq Ahmad ◽  
Maryam ◽  
Muhammad Ahsan ◽  
Muhammad Rashid Shaheen ◽  
...  
Keyword(s):  
Plant Height ◽  
Weed Control ◽  
Allium Cepa ◽  
Weed Management ◽  
Block Design ◽  
Yield Reduction ◽  
Weed Biomass ◽  
Allium Cepa L ◽  
Randomized Complete Block Design ◽  
Number Of Leaves

Onion (Allium cepa L.) is one of the most important vegetables in family Alliaceae, which is cultivated worldwide. In onion, weeds are among one of the major concerns which cause its yield reduction. The present study was designed to assess the effectiveness of different methods for weed control in onion. In this study, five treatments were selected including control, black polythene mulch sheet, white polythene mulch sheet, Dual Gold spray @ 9.0 mL L-1 and Preact spray @ 7.5 mL L-1 to control weeds. The weedicides were applied as pre-emergence sprays before transplanting the seedlings. The experiment was laid out in Randomized Complete Block Design with three replications. From the results, it was concluded that there were significant differences among the studied weed control treatments. Among the five treatments, greater plant height (33.0 cm), number of leaves per plant (8), bulb diameter (4.7 cm) and bulb weight (73 g) were observed in the ridges covered with black mulch sheet. However, the minimum weed biomass (fresh and dry) was recorded in black mulch sheet and Preact pre-emergence weedicide spray (140 and 80 g in both). Thus, black polythene sheet as mulching material was found better option for weed management in onion fields.

scholarly journals Study on Different Methods of Weed Management in Onion (Allium cepa L.)

2019 ◽  
pp. 1-7
Author(s):  
Sheela Barla ◽  
R. R. Upasani
Keyword(s):  
Allium Cepa ◽  
Cover Crops ◽  
Weed Management ◽  
Dry Matter ◽  
Growth Stages ◽  
Plastic Mulch ◽  
Net Return ◽  
Pooled Data ◽  
Allium Cepa L ◽  
Hand Weeding

A weed management study on onion (Allium cepa L.) was conducted at Birsa Agricultural University, Jharkhand, India during winter season of 2016-17 and 2017-18 in a randomized block design comprised of nine weed control treatments consisting plastic mulch, available weeds mulch, straw mulch, cover crops (Fenugreek), oxyfluorfen 0.5 kg/ha pre-emergent (PE), pendimethalin 1.0 kg/ha PE, mechanical weeding by Dutch hoe, hand weeding at 20, 40, 60 days after transplanting (DAT) and weedy check. Hand weeding at 20, 40 and 60 DAT was most effective in reducing weed dry matter however it was similar to plastic mulch at all the growth stages of crop during 2016-17, 2017-18 as well as in pooled except at 60 DAT in 2016-17. Hand weeding reduced weed dry matter to the extent of 75.83 and 84.83 percent during 2016-17, 100 and 89.21 percent during 2017-18, 98.64 and 88.62 percent under pooled data at 30 and 60 DAT respectively and the corresponding reduction in weed dry matter due to application of plastic mulch was 70.73 and 40.32 percent during 2016-17, 100 and 93.64 percent during 2017-18, 98.37 and 86.52 percent under pooled data at 30 and 60 DAT respectively, compared to weedy check. Application of plastic mulch recorded 300 and 38 percent higher onion yield during 2016-17, 1959 and 117 percent during 2017-18, 576 and 70 percent higher under pooled data compared to weedy check and hand weeding respectively. Plastic mulch also recorded maximum net return 364136, 380185 and 372160 /ha during 2016-17, 2017-18 and under pooled data similar to net return with application of oxyfluorfen 0.25 kg/ha PE, pendimethalin 1 kg/ha PE and hand weeding during 2016-17 while under pooled data maximum B:C ratio was with plastic mulch and was similar to oxyfluorfen 0.25 kg/ha PE, pendimethalin 1 kg/ha PE and hand weeding.

scholarly journals Chemical weed management in onions (Allium cepa L.)

1969 ◽  
Vol 73 (1) ◽  
pp. 59-65
Author(s):  
Nelson Semidey ◽  
Elvin Caraballo
Keyword(s):  
Weed Control ◽  
Allium Cepa ◽  
Weed Management ◽  
Allium Cepa L ◽  
Hand Weeding

Four herbicide experiments were conducted in a San Antón soil at Juana Díaz Substation from 1985 to 1988. In the first experiment, conducted in 1985-86, we found that post emergence oxyfluorfen (0.14, 0.28 and 0.56 kg ai/ha) preceded by preemergence DCPA (11.2 kg ai/ha) plus hand weeding effectively controlled broadleaf weeds (93-97%) for 9 weeks. Onion yield increased proportionately with the increasing rates of oxyfluorfen. In the second experiment, established in 1986-87, preemergence metolachlor (2.8 and 5.6 kg ai/ha) caused high phytotoxicity on onion and affected its yield. Oxyfluorfen (0.14 kg ai/ha) applied in mixture and sequentially with fluazifop-P (0.24 kg ai/ha) provided an excellent weed control with onion yields similar (P = 0.05) to that obtained in the hand-weeded check. In two subsequent experiments established in 1987-88 we found that two or three applications of either oxyfluorfen (0.14 kg ai/ha) 4- fluazifop-P (0.25 kg ai/ha) or oxyfluorfen (0.14 kg ai/ha) + sethoxydim (0.25 kg ai/ha) mixtures gave excellent grass and broadleaf weed control. However, no significant differences (P = 0.05) in onion yield were detected by increasing the number of herbicide applications in either experiment.

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