scholarly journals Effect of pre and post emergence herbicide for weed management in onion bulb yield in northern dry zone of Karnataka, India

2020 ◽  
Vol 9 (2) ◽  
pp. 1893-1898
Author(s):  
N. Jagadeesha ◽  
G. B. Srinivasulu ◽  
Venkatesh Hosamani ◽  
B. Ravikumar ◽  
K. R. Lingamurthiy
Keyword(s):  
Weed Management ◽  
Onion Bulb ◽  
Dry Zone ◽  
Bulb Yield

scholarly journals Impact of Integrated Weed Management on Bulb Yield of Onion

2020 ◽  
Vol 23 (1) ◽  
pp. 83-89
Author(s):  
MR Islam ◽  
M Moniruzzaman ◽  
AJM Obaidullah ◽  
AHF Fahim
Keyword(s):  
Weed Management ◽  
Agricultural Research ◽  
Block Design ◽  
Integrated Weed Management ◽  
Research Centre ◽  
Cost Ratio ◽  
Benefit Cost Ratio ◽  
Hand Weeding ◽  
Benefit Cost ◽  
Bulb Yield

The experiment was conducted at Regional Spices Research Centre, Bangladesh Agricultural Research Institute, Magura, Bangladesh during 2016-2017 and 2017- 2018 to optimize weed management practice for onion bulb production through Integrated Weed Management (IWM). The experiment was laid out in a Randomized Complete Block Design with three replications. Two different herbicides (Oxadiazon and Pendimethalin) with different doses in combination with hand weeding (HW) were used as treatments. The total number of treatments were 12 viz. [email protected] l/ha, [email protected] l/ha, T3= [email protected] l/ha, T4= [email protected] l/ha + one HW at 45 DAT (Days After Transplanting), T5= [email protected] l/ha + one HW at 45 DAT,T6= [email protected] l/ha + one HW at 45 DAT, [email protected] l/ha, [email protected] l/ha, T9= [email protected] l/ha + HW at 45 DAT, T10= [email protected] l/ha+ HW at 45 DAT, T11= Weed free and T12 = Weedy check (control). The onion var. BARI Piaz-1 was used as the test crop. The highest bulb yield (7.63 tha-1 in 2016 & 9.56 t ha-1in 2017) and benefit cost ratio (2.14 in 2016 and 2.46 in 2017) were obtained from T6= [email protected] l/ha + one hand weeding at 45 DAT while the lowest bulb yield (4.22 t ha-1in 2016 and 6.28 t ha-1in 2017) was obtained from T12 = Weedy check (control), while lowest benefit cost ratio (1.33 in 2016 and 1.74 in 2017) from treatment T11 =Weed free. It was concluded that [email protected] l/ha with one hand weeding at 45 days after transplanting performed better for controlling weed and maximizing bulb yield of onion. Bangladesh Agron. J. 2020, 23(1): 83-89

Weed management in wet (drum)-seeded rice under Southern dry zone of Karnataka

2021 ◽  
Vol 53 (2) ◽  
pp. 117-122
Author(s):  
S.B. Yogananda ◽  
P. Thimmegowda ◽  
G.K. Shruthi
Keyword(s):  
Weed Management ◽  
Dry Zone

Efficacy of weed management practices in transplanted rice under southern dry zone of Karnataka

2018 ◽  
Vol 50 (3) ◽  
pp. 294
Author(s):  
G.N. Dhanapal ◽  
S. Kamala Bai ◽  
M.T. Sanjay ◽  
P. Nagarjun ◽  
A. Sandeep
Keyword(s):  
Weed Management ◽  
Management Practices ◽  
Transplanted Rice ◽  
Dry Zone

scholarly journals Yield and storability of onion (Allium cepa L.) as affected by varying levels of irrigation

1970 ◽  
Vol 35 (2) ◽  
pp. 247-255 ◽  
Author(s):  
SK Biswas ◽  
A Khair ◽  
PK Sarker ◽  
MS Alom
Keyword(s):  
Weight Loss ◽  
Allium Cepa ◽  
Onion Bulb ◽  
Storage Losses ◽  
And Storage ◽  
Bulb Yield

Bulb yield and storability of onions (cv. BARI Piaj-1) was studied against five levels of irrigation viz., no irrigation, irrigation at 10, 15, 20, and 30 days interval. Yield and storage losses were increased gradually with increasing number of irrigation. The highest yield of onion was obtained with a total of six irrigations at 10 days interval and it was at par with treatment that received four irrigations at 15 days intervals. Losses due to rotting, sprouting, and physiological weight loss were found higher in irrigated treatments. After six months of storage (from 1st week of April to 1st week of October), the maximum cumulative weight loss (56.72%) was recorded in onions irrigated at 10 days interval, while the minimum (46.80%) was recorded in non-irrigated onions. Keywords: Storability; onion bulb; irrigation; storage losses.DOI: 10.3329/bjar.v35i2.5887Bangladesh J. Agril. Res. 35(2) : 247-255, June 2010 

scholarly journals Evaluation of different insecticides for the management of onion thrips (Thrips tabaci Lindeman, 1889) (Thysanoptera, Thripidae) on onion (Allium cepa L.) crops

2018 ◽  
Vol 87 (2) ◽  
pp. 165-176
Author(s):  
Muhammad Asghar ◽  
Mirza Muhammad Qadeer Baig ◽  
Muhammad Afzal ◽  
Naeem Faisal
Keyword(s):  
Cost Benefit ◽  
Thrips Tabaci ◽  
Onion Bulb ◽  
Net Income ◽  
Onion Thrips ◽  
Allium Cepa L ◽  
Before And After ◽  
Cost Benefit Ratio ◽  
Thrips Population ◽  
Bulb Yield

Abstract The efficacy of five insecticides containing a.i. bifenthrin, dimethoate, spinosad, spinetoram and chlorfenapyr was evaluated following RCBD against Thrips tabaci in farmer’s field for two consecutive years. The data were recorded before and after 24 h, 48 h, 72 h and 7 days of spraying. The results showed that all the insecticides reduced thrips populations compared to controls. However, the maximum reduction in thrips population and highest onion bulb yield (34.07 t/ha) was obtained with dimethoate 40EC followed by bifenthrin 10EC (33.14 t/ha). The minimum onion bulb yield (25.71 t/ha) was obtained in the control, where no insecticide was applied against thrips. If onion thrips are not controlled, the damage they cause can reduce bulb yields by 9-25%. The highest incremental return over the control (Rs.83, 600/ha), net income (Rs.82, 913/ha) and maximum cost benefit ratio were also obtained in the treatment with dimethoate 40EC.

Effects of water stress at specific growth stages on onion bulb yield and quality

2004 ◽  
Vol 68 (2) ◽  
pp. 107-115 ◽  
Author(s):  
Gary Q Pelter ◽  
Robert Mittelstadt ◽  
Brian G Leib ◽  
Cristoti A Redulla
Keyword(s):  
Water Stress ◽  
Specific Growth ◽  
Onion Bulb ◽  
Growth Stages ◽  
Yield And Quality ◽  
Bulb Yield

scholarly journals Effectiveness of reduced doses of flumioxazin herbicide at weed control in direct sow onions

2019 ◽  
Vol 13 (1) ◽  
Author(s):  
Christiane Augusta Diniz Melo ◽  
Amanda Rocha Barbosa ◽  
Roque De Carvalho Dias ◽  
Gustavo Soares da Silva ◽  
Marcelo Rodrigues dos Reis
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Field Experiments ◽  
Effective Control ◽  
Phenological Stages ◽  
Alternative Management ◽  
Leaf Stage ◽  
True Leaf ◽  
Direct Sowing ◽  
Bulb Yield

The recommended application of most herbicides in onion crops is after transplanting seedlings with four true leaves. In the direct sowing system, this recommendation is considered late; an alternative management is the application of reduced doses starting with a true leaf. The objective of this study was to evaluate the use of reduced doses of flumioxazin in the early phenological stages of onions on bulb yield. Two field experiments were installed, and five doses of flumioxazin (5, 10, 15, 20, and 25 g ha-1) were applied in three phenological stages (1st, 2nd, and 1st+3rd true leaf); weed control was carried out. The results demonstrated the efficacy of reduced doses of flumioxazin on onion crop in the early stages. The dose of 20 g ha-1 showed use potential in the two experiments for the cvs. Perfecta and Sirius, enabling reductions of 77 to 88% of the commercial dose recommended for onions established with seedling transplanting. The application of flumioxazin in the 2nd leaf reduced commercial productivity and was ineffective in the control of weeds. The application in the 1st + 3rd leaf, despite being an effective control, caused greater phytotoxicity and, therefore, reduced commercial productivity. The best strategy for weed management is 20 g ha-1 flumioxazin applied to onion plants when they reach the true first leaf stage.

scholarly journals Chemical weed management in hybrid cotton under southern dry zone of Karnataka

2020 ◽  
Vol 8 (6) ◽  
pp. 143-146
Author(s):  
Shekara BG ◽  
Yogesh TC ◽  
Chikkarugi NM
Keyword(s):  
Weed Management ◽  
Dry Zone
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