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Potatoes

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Foliar ferilization in potatoes

Potatoes have a specific demand of micro-nutrients. For optimized yield and quality, a sufficient supply with the different trace elements will be mandatoy.

Leaf analysis over many years are showing an undersupply of micro-nutrients in cropping potatos. These undersupplies can be solved with additional treatments of trace-elements.

 

Availability of nutrients

Soil analysis will help in a first step to identify the availability and under- or oversupply with macro-and micro-elements in the soil. 

But a sufficient supply with nutrients into the soil doesn’t mean a sufficient supply and availability for plants. High pH-values can reduce the availability of micro-elements, low ph-values the macro-elements. Weather and soil conditions for example dry, cold, wet, compressions, can limited the availability of nutrients in the soil. Furthermore, some antagonism (interactions) between the elements can define the availability (potassium is limiting magnesium).

 Leaf and leaf stalk analysis are tools to analyse and estimate the current supply and availability of nutrients. According the results a specific and effective application strategy with foliar fertilizers (micro and macro-elements) can be defined.   

After the harvest you can cross-check with an analysis of the potatos whether your fertilizer strategy was successful or if some adjustments will be necessary for the next season.

Seed treatment

Herbicide application

Potato plants with a sufficient supply with manganese will be more resistant against diseases like scab.

The seed treatment with 0,5 l/ha Lebosol®-Mangan GOLD SC can reduce scab infestations significantly especially under dry conditions

The efficacy and selectivity of herbicides can be improved by the combination with Herbosol®

To increase the efficacy of herbicides, Herbosol is acting as an adjuvant and will improve the distribution of soil active herbicides on the dam surface. The herbicide will be more stable and reliable without washing out and the shifting of ai’s into the soil.

Aminosol® with 2-3 l/ha will help and improve the crop selectivity in combination with post-emerge herbicide applications.

Phosphorus-deficiency

The early growth states

In the early growth state plants can suffer growth due to undersupply of nutrients. This is caused by the small root system at this growth state. Especially phosphorus, manganese and boron are often not sufficient available for the young plants. More and more visible on the leaves will be the undersupply with phosphorus.

Lebosol®-Magphos with 6.0 l/ha and two applications at intervals of 10-14 days will improve the tuber formation and thickening of stolones.

For a better tuber growth, 6.0 l/ha Lebosol®-Magphos can be applied after reaching 10 mm of tuber diameter.

Trace nutrient care

The influence of trace elements on yield, particularly, on quality,  is also discussed more and more  in the cultivation of potatoes. The application of trace elements must be given a practical dimension. Who knows or supposes the problems specified in the table should think about the application of trace elements.

Element

Lack symptoms

Appearances of lacks


Bor (B)

hollowness, iron spotting, low starch content, raised sugar content

sandy soils, high nitrogen and calcium content, low soil content, high pH value, dry, cold and wet


Zink (Zn)

less tubers per shrub, lower radiation tolerance, lower starch contents

high pH value, high phosphorus content in soil, cold and wet


Mangan (Mn)

slower  youth development, worse nitrogen utilization, raised scab infestation

sandy,  loose soils, dry, cold, and wet, high pH value, low soil contents


Kupfer (Cu)

raised  disease predisposition, lower frost tolerance, worse skin development

humous, sandy soils, high pH value, dry, cold and wet, low soil contents


Eisen (Fe)

less chlorophyll, low nitrate efficiency, lower herbicide tolerance

temporarly during cool periods, waterlogged soil, locations with high copper contents, locations  rich in lime, high pH value


 

Based upon the results of leaf stalk monitorings of  Lebosol® during the last 10 years we recommend  to cover the micronutrient need of your potatoes:

At the beginning of meeting across the rows 1 - 2 x  1 l/ha Lebosol®-Mangan GOLD SC + 1 l/ha Lebosol®-AqueBor SC
or 1 - 2 x 1 - 2 l/ha Lebosol®-QuadroS SC + 1 l/ha Lebosol®-AqueBor

Main recommendations

Aim/Problem Recommendation Time
Reduction in susceptibility to scab 0,5 l/ha Lebosol®-Mangan GOLD SC With dressing
Improvement in effectiveness and tolerability of soil-applied herbicides 0,2 - 0,6 l/ha Herbosol® (increase to 0.6 l/ha on light soils with a low humus content, reduce to 0.2 l/ha for heavy soils with a high humus content) With soil-applied herbicides
Improvement in effectiveness and tolerability of post-emergence herbicide sprays or generally to boost stress tolerance 2 - 3 l/ha Aminosol® With post-emergence herbicides, in extreme weather conditions (cold, wet, dry)
Tuber set 2 times 6 l/ha Lebosol®-Magphos To thicken the stolons
Reduction in susceptibility to blue/black spot bruising, potassium supply 2 times 6 l/ha Lebosol®-Kalium 450 At tuber set and after flowering
Tuber growth, starch content, yield 2 mal 6 l/ha Lebosol®-Magphos From a tuber diameter of 10 mm
Boosting of resistance to illness 4 - 6 l/ha VITALoSol® GOLD SC From beginning of row closure
Yield and vitality, micronutrients 1 - 2 times 1 l/ha Lebosol®-Mangan GOLD SC +
1 - 2 times 1 l/ha Lebosol®-AqueBor SC
From beginning of row closure
Yield and vitality, macronutrients 2 - 3 times 2 - 4 l/ha Lebosol®-MagSOFT SC From beginning of row closure
Yield and vitality, macronutrients 3 - 4 times 4 l/ha Lebosol®-Calcium-Forte SC From beginning of row closure