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

Abstract

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.

Variations in Total Phenolic, Total Flavonoid Contents, and Free Radicals’ Scavenging Potential of Onion Varieties Planted under Diverse Environmental Conditions

“…These species are different in form, taste and colour [ 19 ], and have largely been consumed as spices, vegetables, and medicines since pre-historic times [ 5 ]. Allium cepa L. (onion/Piyaz), is one of the most important, and health beneficial vegetable crop cultivated on a large scale throughout the world (in >175 countries), mainly in Asia [ 20 ], and is ranked second after tomato [ 21 ]. Onion is a biennial herb belonging to the family Amaryllidaceae/Alliaceae, with bulbous, scented bulbs having various shapes and skin colour.…”

“…Onion is a biennial herb belonging to the family Amaryllidaceae/Alliaceae, with bulbous, scented bulbs having various shapes and skin colour. In 2020, estimated global production of onion was around 400,000 tonnes [ 20 ], which was 25% more than the past decade [ 22 ]. China is the leading country in term of area of onion cultivation and its annual production, followed by India, USA, Iran, Egypt, Turkey, and Russia, while Pakistan ranked 8 th in the world with 1939.6 thousand tonnes of production [ 23 ].…”

An integrated weed management approach in tomato using soil steaming, mulching, and winter cover crops

“…Zangoueinejad et al, 2018, found that the highest yield per unit area was obtained from a plastic mulch (20.93 kg m-2), while the lowest (1.24 kg m-2) was observed in the control plots without plastic mulch. In onions, yield increased by up to 300% using plastic mulch (Barla and Upasani, 2019). Our results show that the combination of steaming and plastic mulching severely impaired weed competition and increased tomato yield by 136 and 158% at 5 and 20 min, respectively, than 0 min of steaming.…”

Role of Entomophily and Artificial Pollination in Enhancing Quality and Yield of Seed Onion (Allium cepa L.) in Indian Himalayas

“…Pollination studies in Onion (Allium cepa L.) during 2017-18 was estimated to be 22.42 million tons from 1.28 million hectare area (Barla & Upasani, 2019;Mahmadajaruddin & Mamani, 2020). Although the supply of onions for various culinary purposes is met with sufficient quantities, the demand for seeds is always high and both the public and private sectors seldom meet the increasing demands (Panacci et al, 2020;Meghana et al, 2021).…”