Effects of differential rates of nitrogen and phosphorus on early blight in potatoes

Barclay, G. M.; Murphy, H. J.; Manzer, F. E.; Hutchinson, F. E.

doi:10.1007/bf02855367

Cited by 27 publications

(23 citation statements)

References 5 publications

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“…High N levels prolong plant vigour, delay maturity and thus reduce the susceptibility of potatoes to early blight, a disease of senescent and weak potatoes. Thus any treatment that prolongs plant vigour and delays maturity will reduce the susceptibility of potatoes to early blight . Therefore, increasing the rate of N application is an obvious suggestion to reduce the susceptibility of potatoes to early blight.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, increasing the rate of N application is an obvious suggestion to reduce the susceptibility of potatoes to early blight. However, increasing the rate of N‐fertilizer as a means of suppressing the development of early blight is not economically advantageous compared with using fungicides . Moreover, increasing the rate of N‐fertilizer has environmental impacts, because N in the form of nitrate can leach out of the soil and pollute the groundwater.…”

Section: Introductionmentioning

confidence: 99%

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The influence of timing the application of nitrogen fertilizer on early blight (Alternaria solani)

Abuley

Nielsen

Hansen

2018

Pest Management Science

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BACKGROUND Field experiments were carried out in 2016 and 2017 to study the influence of timing the application of nitrogen fertilizer (N‐fertilizer) on the susceptibility of potatoes to early blight. We hypothesized that potatoes that receive N‐fertilizer as split applications or a one‐time application at emergence will have a higher N content and be less susceptible to early blight than those that receive N‐fertilizer as a one‐time application before planting. N‐fertilizer was applied either as a one‐time application before planting or at emergence and as split applications. RESULTS Potatoes that did not receive N‐fertilizer were more susceptible to early blight [high area under the disease progress curve (AUDPC)] than those that did receive N‐fertilizer (low AUDPC). The timing of N‐fertilizer application had a significant effect on the susceptibility of potatoes to early blight. Potatoes that received the entire quantity of N‐fertilizer at emergence or as split applications had higher N contents and were less susceptible to early blight than those that received the entire quantity of N‐fertilizer before planting. Potatoes that did not receive N‐fertilizer had a markedly lower starch yield than potatoes that received N‐fertilizer. Potatoes that received the entire quantity of N‐fertilizer before planting had a lower starch yield than potatoes that received the entire quantity of N‐fertilizer at emergence or as split applications. CONCLUSION N‐fertilizer applied as a one‐time application at emergence or as a split application was the best treatment to ensure both high N content and lower attack of early blight, which confirms our hypothesis. © 2018 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of timing the application of nitrogen fertilizer on early blight (Alternaria solani)

Abuley

Nielsen

Hansen

2018

Pest Management Science

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“…Infection is favoured by warm temperature and alternating high relative humidity provided by heavy dew, light rains or irrigation. Temperature in the range of 25-30 °C is congenial for the disease (Barclay et al 1973 ). A positive correlation exists between minimum temperature, afternoon relative humidity and rainfall with early blight (Behera et al 2009 ).…”

Section: Epidemiologymentioning

confidence: 96%

Pre and Post Harvest Diseases of Potato and Their Management

Arora

Sharma

2014

Fungal Biology

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“…Phosphorus is generally considered to: (1) increase plant resistance to disease by increasing plant vigor (12); (2) stimulate root growth, which may allow the plant to escape the effects of Verticillium infection (13); and (3) decrease the incidence of late blight, Verticillium wilt and scab (14). However, high P levels have also been reported to increase early blight infection of leaves by speeding maturity and providing more senescent tissue for early blight infection (15).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of nutrient solution phosphorus concentration on potato plantlet tuber production under greenhouse conditions¹

Tukaki

Mahler

1990

Journal of Plant Nutrition

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Phosphorus fertilizer management of greenhouse grown micropropagated potato plantlets has been based on field research. Differences in growing conditions, potting media and the planting material itself may make the field research data base unacceptable in a greenhouse environment. This study was conducted to determine the optimum nutrient solution phosphorus (P) concentration for maximum growth and yield of micropropagated potato plantlets grown under greenhouse conditions. Nutrient solution P concentrations ranging from 0 to 55 μg P/ml were evaluated. Each nutrient solution P concentration was applied weekly to micropropagated potato plantlets that were grown in 80% vermiculite-20% sand potting medium. Results indicate that P concentrations between 10 and 35 μg P/ml are optimum for potato plantlet tuber production. This P concentration range maximizes vegetative weight, total 1 Paper number 89-7-23 of the Idaho Agricultural Experiment station. TUKAKI AND MAHLERtuber weight and number of tubers produced per micropropagated potato plantlet. Data further indicated that the potting medium retained and possibly accumulated P from the weekly applied nutrient solution. This enabled the plants, receiving relatively low nutrient solution P concentrations, to extract more P for proper growth and yield with time. To avoid unnecessary nutrient costs, the 15 μg P/ml nutrient solution concentration is recommended. This P concentration will produce maximum tuber yields and still allow for less than optimum management which may cause P conversion to unavailable forms. Additional studies should be conducted to correlate plant tissue concentration at different growth stages with final tuber yields. INTRODUCTIONThe scientific literature contains ample reports on potato (Solatium tubero sum L.) fertilization and the effect of fertilization on yield, tuber quality and plant tuber composition. However, the data are often inconsistent and/or incomplete at maximum yield levels (1). Most research has focused on nitrogen (N) because it is most often deficient. However, the wide-spread use of substantial quantities of phosphorus (P) and potassium (K) fertilizers have ensured that many potato producing soils have accumulated P and K to the point where crops do not respond to further P and K additions (2). In contrast to most other plant nutrients, no mechanism for long-term storage of plant-available N exists in soils. Although ammonium-nitrogen (NH 4 + -N) is

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Effects of differential rates of nitrogen and phosphorus on early blight in potatoes

Cited by 27 publications

References 5 publications

The influence of timing the application of nitrogen fertilizer on early blight (Alternaria solani)

The influence of timing the application of nitrogen fertilizer on early blight (Alternaria solani)

Pre and Post Harvest Diseases of Potato and Their Management

Evaluation of nutrient solution phosphorus concentration on potato plantlet tuber production under greenhouse conditions¹

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Effects of differential rates of nitrogen and phosphorus on early blight in potatoes

Cited by 27 publications

References 5 publications

The influence of timing the application of nitrogen fertilizer on early blight (Alternaria solani)

The influence of timing the application of nitrogen fertilizer on early blight (Alternaria solani)

Pre and Post Harvest Diseases of Potato and Their Management

Evaluation of nutrient solution phosphorus concentration on potato plantlet tuber production under greenhouse conditions1

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Evaluation of nutrient solution phosphorus concentration on potato plantlet tuber production under greenhouse conditions¹