Influence of fertilisers, host factors and storage conditions in relation to disease severity: a case study of black mould rot of onion

Srinivasan, R.; Shanmugam, V.; Kamalakannan, A.; Surendran, M.

doi:10.1556/aphyt.37.2002.1-3.13

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…Although leaf tissue Ca levels had a quadratic effect with increasing N fertilizer, in general, leaf tissue Ca hovered around 9 to 10 mgÁg -1 throughout the N fertilizer range except for the very highest N fertilizer rates, 224 and 336 kgÁha -1 , in which leaf tissue Ca jumped to 12.4 and 14.0 mgÁg -1 , respectively. These high Ca levels were probably an artifact of using Ca(NO 3 ) 2 as the N source, which may be a side benefit because Ca is known to be an important indicator of postharvest storability in many commodities, including onions (Srinivasan et al, 2002).…”

Section: Resultsmentioning

confidence: 99%

Effects of Nitrogen, Phosphorus, and Potassium Rates and Fertilizer Sources on Yield and Leaf Nutrient Status of Short-day Onions

Boyhan¹,

Torrance²,

Hill³

2007

horts

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This is a compilation of several studies that were performed to address specific grower concerns or questions about onion fertilization, to assess onion fertility, to make adjustments in soil test recommendations, and to test specific fertilizers for clients covering the 1999–2000 to 2004–2005 seasons. The synthesis of these studies was to evaluate levels of nitrogen (N), phosphorus (P), and potassium (K) fertilizers and their effect on yield, graded yield, and leaf tissue nutrient status in short-day onions over 6 years. In addition, various fertilizers were evaluated for their effect on these parameters. There was a significant increasing quadratic effect on yield from increasing N fertilizer from 0 to 336 kg·ha−1 with an R2 of 0.926. Maximum calculated yield was at 263 kg·ha−1 N fertilizer; however, the yield at this rate did not differ, based on a Fisher's least significant difference (P ≤ 0.05), from our current recommendations of 140 to 168 kg·ha−1 N. Jumbo (7.6 cm or greater) yield performed in a similar fashion. Phosphorus fertilizer rates from 0 to 147 kg·ha−1 had no effect on total yield, but did affect jumbo yields, which decreased linearly with an R2 of 0.322. Evaluations of P fertilizer in the 2001–2002 and 2002–2003 seasons only, when the exact same P fertilizer rates were used, showed a decreasing quadratic effect for jumbo yields with the lowest jumbo yields at 83 kg·ha−1 P fertilizer and jumbo yields increasing with 115 and 147 kg·ha−1 P fertilizer rates. Potassium fertilizer rates from 0 to 177 kg·ha−1 had a quadratic affect on total yield, with the highest yield of 52,361 kg·ha−1 with 84 kg·ha−1 K fertilizer rate. As would be expected, N and P fertilizer rates affected leaf tissue N and P levels, respectively. In addition, N fertilizer rates affected leaf tissue calcium (Ca) and sulfur levels. Potassium fertilizer rates had a significant linear effect on leaf tissue K 3 of 6 years. In addition, K fertilizer rates had a significant effect on leaf tissue P levels. Several fertilizers, including Ca(NO3)2 and NH4NO3, along with complete fertilizers and liquid fertilizers, were used as part of a complete fertilizer program and showed no differences for total yield or jumbo yield 4 of 5 years of evaluation when applied to supply the same amount of N fertilizer. Based on the results of this study, soil test P and K recommendations for onions in Georgia have been cut 25% to 50% across the range of soil test levels.

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Section: Resultsmentioning

confidence: 99%

Effects of Nitrogen, Phosphorus, and Potassium Rates and Fertilizer Sources on Yield and Leaf Nutrient Status of Short-day Onions

Boyhan¹,

Torrance²,

Hill³

2007

horts

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“…Apart from that, components of cinnamon, clove, pepper, cardamom star anise, and stone flower exhibited inhibitory action against black mould (Kumar et al, 2015). The windrow method of curing along with the storage by the hanging method can considerably reduce rotting since the temperature and humidity required by microbes were reduced by ventilation (Srinivasan & Shanmugam, 2006). Neck rots caused by B. aclada, B. allii, B. byssoidea causes dark brown outer scales and a water-soaked appearance (Chugunov & Li, 2015;Ji et al, 2018;Wang et al, 2014).…”

Section: Harvest and Postharvest Practicesmentioning

confidence: 99%

“…Generally, pathogens enter onion bulbs through wounds formed due to mechanical injury, mishandling, and high pressure during storage or sunscald (Abd‐Alla et al., 2011). The bulb, neck, and outer scale/skin are also susceptible to pathogen attack when onion bulbs are not properly cured and dried before storage (Srinivasan & Shanmugam, 2006). The postharvest diseases emerging during storage and handling can produce toxins that are poisonous to human health (Khalifa et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The back mould rot leading to discoloration of tissue and shriveling of scales, caused by Aspergillus Niger stands as the predominant disease in onions and causes spoilage as high as 80% (Srinivasan & Shanmugam, 2006). Chemicals such as carbendazim (0.1%), copper oxychloride (0.25%), and mancozeb (0.25%) completely inhibited the mycelial growth of A.Niger , and acetic acid at 0.3% and 0.4% concentrations also showed similar results (Srinivasan & Shanmugam, 2006). Apart from that, components of cinnamon, clove, pepper, cardamom star anise, and stone flower exhibited inhibitory action against black mould (Kumar et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

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A comprehensive review on recent advances in postharvest treatment, storage, and quality evaluation of onion (Allium cepa): Current status, and challenges

Kiran,

Aradwad,

T. V.

et al. 2024

Future Postharvest and Food

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Onion is an important economical and nutritional vegetable crop having a global demand. However, the long‐term storage and availability of quality produce during off seasons remain a constraint. The intricate process of quality degradation in onions, both pre and postharvest, is influenced by internal factors and storage conditions. To preserve the postharvest quality and prolong the shelf life of onions, effective postharvest technologies incorporating quality assessment and preservation treatments are crucial. This paper delves into the key factors associated with crop quality, postharvest treatments, and storage, providing a comprehensive understanding of their cause‐effect relationships. The primary objective of this review is to shed light on diverse postharvest treatments, storage conditions, and structures, along with their effects on the physical, chemical, and biochemical aspects of onions. Additionally, the study explores destructive and non‐destructive assessment technologies to evaluate the quality of onions. Storage and marketability is intricately tied to the advancement of appropriate technology aimed at minimizing losses during various stages of harvesting and storage conditions. This review serves as a preliminary document that can assist in exploring critical factors and advancing technologies to enhance the shelf life and quality of onions, bridging the gap between traditional methods and promising advancements.

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Nitrogen nutrition and fertilization of onions (Allium cepa L.)–A literature review

Geisseler

Ortiz

Díaz

2022

Scientia Horticulturae

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Influence of fertilisers, host factors and storage conditions in relation to disease severity: a case study of black mould rot of onion

Cited by 5 publications

References 6 publications

Effects of Nitrogen, Phosphorus, and Potassium Rates and Fertilizer Sources on Yield and Leaf Nutrient Status of Short-day Onions

Effects of Nitrogen, Phosphorus, and Potassium Rates and Fertilizer Sources on Yield and Leaf Nutrient Status of Short-day Onions

A comprehensive review on recent advances in postharvest treatment, storage, and quality evaluation of onion (Allium cepa): Current status, and challenges

Nitrogen nutrition and fertilization of onions (Allium cepa L.)–A literature review

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