Effects of Foliar and Tuber Sprout Suppressants on Storage of Ware Potatoes under Tropical Conditions

Nyankanga, Richard; Murigi, Winnie Wanjiku; Shibairo, Solomon I.; Olanya, O. M.; Larkin, Robert P.

doi:10.1007/s12230-018-9662-0

Cited by 12 publications

(13 citation statements)

References 27 publications

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“…This effect was significant in the periods of 135 and 180 days. Nyankanga et al (2018) observed a significant decrease in mass loss when comparing Kenya Mpya tubers treated with 1,4-DMN and untreated ones.…”

Section: Resultsmentioning

confidence: 83%

“…The effects of 1,4-DMN in reducing the average length of the sprouts were significant for both cultivars, but only after a longer storage period (180 days) under 20 °C. Nyankanga et al (2018), when testing the use of 1,4-DMN in different potato cultivars, found that the use of DMN did not prevent the beginning of sprouting in the Shangi and Asante cultivars, but significantly reduced the development of sprouting during storage compared to untreated tubers. They also observed that the use of 1,4-DMN effectively suppressed the growth of sprouts compared to untreated tubers.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, sprouting correlates positively to mass loss. Thus, the use of sprout suppressors reduces those losses (Azad et al, 2017;Nyankanga et al, 2018). However, the 1,4-DMN effect on sprout inhibition appears to be transient, explaining why there is no significant effect of 1,4-DMN in subsequent evaluation periods.…”

Section: Resultsmentioning

confidence: 99%

“…That was mainly due to the higher averages observed for these characteristics after a long period of storage. Different cultivars require different levels of suppressors in the tubers to suppress sprouting during storage (Nyankanga et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

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Importance of 1,4-dimethylnaphthalene in maintaining the quality of stored tubers of Asterix and Challenger cultivars

et al. 2022

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This work aimed to analyze 1,4-DMN efficiency in the suppression of sprouting and the consequent maintenance of quality in potato tubers of Asterix and Challenger cultivars stored during different periods under varying temperatures: eight treatments with and without 1,4-DMN under temperatures of 8 °C and 20 °C. Treatments effect were evaluated after 0, 45, 90, 135 and 180 days after application. The evaluated parameters were the loss of fresh mass, length of the sprouts and activity of the enzymes polyphenoloxidase and peroxidase. The results indicate that the application of 1,4-DMN reduces the loss of fresh mass, this effect was more intense for the cultivar Challenger, at 8 °C. There were also significant effects in reducing the average length of the sprouts for both cultivars evaluated, after 180 days, at 20 °C. There was little or no difference in the level of oxidative stress caused in the tubers. Hence, the effects of 1,4-DMN on the quality control of potatoes included reduced loss of fresh mass and a shorter average length of sprouts for both cultivars evaluated compared to control, for both temperatures. These effects intensify in the cultivar Challenger and treatments with temperatures of 20 °C.

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Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Importance of 1,4-dimethylnaphthalene in maintaining the quality of stored tubers of Asterix and Challenger cultivars

et al. 2022

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“…But the efficiency of these alternative inhibitors depends on the cultivar, temperature of storage, progression of tuber dormancy, concentration, time and the number of applications, and the mode of the chemical action. Recently, we have shown that sprout suppression on tubers of tropical-adapted potato cultivars could be achieved for extended storage duration (Nyankanga et al 2018). However, there are few published reports available in the literature that document the efficacy of these sprout suppressants at different storage temperatures, when applied on tubers of tropical-adapted potato cultivars.…”

Section: Introductionmentioning

confidence: 99%

Effect of Storage Temperature and Postharvest Tuber Treatment with Chemical and Biorational Inhibitors on Suppression of Sprouts During Potato Storage

Murigi

Nyankanga

Shibairo

2021

Journal of Horticultural Research

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Consumption of ware potatoes in the tropics may be enhanced by storage under conditions that inhibit sprouting, most important of which is the temperature. The effects of storage temperatures (10 °C and 23 °C) and two alternatives to the chlorpropham (CIPC): 1,4-dimethylnaphthalene (DMN) and peppermint oil (PMO), a biorational inhibitor, were evaluated for tuber sprout suppression at postharvest. Tubers of three cultivars – ‘Asante’, ‘Kenya Mpya’, and ‘Shangi’ – with different dormancy lengths were assessed. Storage temperatures and suppressant effects on tuber sprouting, sprout length and sprout numbers per tuber were investigated in replicated storage experiments. Significant differences in sprout inhibition were observed between the two temperatures with suppressive effects higher at 10 °C than in 23 °C. CIPC had the greatest suppressive effect on tuber sprout inhibition at both temperatures. After 24 weeks of storage, the suppressive effects of CIPC at 10 °C was 100% on the three cultivars, whereas all the nontreated tubers sprouted after six (‘Shangi’), twelve (‘Asante’), fourteen (‘Kenya Mpya’) weeks of storage. At 23 °C, the effectiveness of CIPC followed the dormancy period of the cultivars, with ‘Shangi’ recording significantly more sprouted tubers followed by ‘Asante’ and ‘Kenya Mpya’. The inhibition of sprouting by DMN and PMO varied with storage temperatures and cultivars, but were significantly greater than the nontreated tubers. At 10 °C, the effectiveness of DMN treatment was equal to that of CIPC for ‘Kenya Mpya’ resulting in 100% inhibition. In the PMO treatments, complete inhibition of sprouting was observed for 18 weeks on cultivars ‘Asante’, ‘Kenya Mpya’ and 14 weeks on ‘Shangi’. At 23 °C, PMO suppressed sprouts for 14 weeks on ‘Asante’ and ‘Kenya Mpya’ and on ‘Shangi’ for 8 weeks. Storage temperature effects on sprout length and numbers varied with inhibitor type and cultivar. These findings showed that in potato tuber storage, inhibitors can replace low temperature but to an extent depending on the cultivar dormancy character and storage length, thus enabling greater consumption of potatoes in tropical regions.

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Storability of Irish Potato (Solanum tuberosum L.) Varieties Grown in Kenya, Under Different Storage Conditions

et al. 2022

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Long-term use of fresh potatoes is constrained due to post-harvest losses and limited or poor storage systems. Loss of potato quality during storage is mostly due to weight loss, excessive sprouting, decaying, greening, pest attack and changes in sugar content which is a major concern for processors. The storability of three potato varieties namely Shangi, Unica, and Dutch Robijn was evaluated under four storage conditions: (1) room temperature (RT) (21.7 ± 5 °C) and ambient relative humidity (RH) (73.5 ± 6.7%); (2) 10 °C/75% RH; (3) 10 °C/ambient RH and (4) 7 °C/75% RH for 3 months. Parameters analysed included weight loss, sprouting, greening, rotting incidence and changes in simple sugars (sucrose, glucose and fructose) content. Shangi variety had the poorest storability having exhibited the highest weight loss, sprouting, greening and rotting rates among the varieties and in all storage conditions. In all the varieties, weight loss was highest at room temperature/RH (6.9–35.13%) and lowest at 7 °C/75% RH (1.6–3.7%). Sprouting rate was highest at RT/RH (100%) and lowest at 7 °C/75% RH (2.0–45.2%). Greening incidence was highest at RT/RH (10.3–24.0%) and lowest at 7 °C/75% RH (2.0–16.1%). The tubers accumulated simple sugars during storage with the highest relative accumulation recorded at 7 °C/75% RH. Total reducing sugars increased by 3.8–9.3-fold at RT/RH to 26.0–68.5-fold at 7 °C/75% RH. Low-temperature storage minimized the rate of physical tuber deterioration with 7 °C/75% RH best preserving the potatoes’ physical properties while it led to the highest accumulation of simple sugars.

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Effects of Foliar and Tuber Sprout Suppressants on Storage of Ware Potatoes under Tropical Conditions

Cited by 12 publications

References 27 publications

Importance of 1,4-dimethylnaphthalene in maintaining the quality of stored tubers of Asterix and Challenger cultivars

Importance of 1,4-dimethylnaphthalene in maintaining the quality of stored tubers of Asterix and Challenger cultivars

Effect of Storage Temperature and Postharvest Tuber Treatment with Chemical and Biorational Inhibitors on Suppression of Sprouts During Potato Storage

Storability of Irish Potato (Solanum tuberosum L.) Varieties Grown in Kenya, Under Different Storage Conditions

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