{Tool} Reducing the use of copper in potatoes (OK-Net Arable Practice Abstract). [Reduktion des Kupfereinsatzes in Kartoffeln.] Creator(s): Dierauer, Hansueli; Siegrist, Franziska and Weidmann, Gilles. Issuing Organisation(s): FiBL - Research Institute of Organic Agriculture. OK-Net Arable Practice abstract, no. 012. (2017)
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(Reducing the use of copper in potatoes)
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(Reduktion des Kupfereinsatzes in Kartoffeln)
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Document available online at: https://orgprints.org/31028/
Summary in the original language of the document
• Lower accumulation of copper in the soil.
• Less damage to microorganisms in the soil.
• Potential saving in costs of spraying agent.
• Improved distribution of spraying agent over the required period of treatment until exhaustion of the permitted maximum quantity.
Practical recommendation
Adapting dosage to state of infestation: As long as there is no infestation in a radius of 50 km, refrain from treating. Observe national information and alert services. As soon as the first case of infestation in the region is reported, protect potatoes with 200 to 250 g of pure copper per hectare. If potatoes in your own or neighbouring fields are afflicted by leaf blight, increase the dosage to 800 g and do not wait longer than a week in between treatments.
Adapting dosage to time of infestation: If yield production is already advanced at time of infection (often after mid/end of June), reduce the copper dosage or forgo its use. Carry out a sample digging to evaluate yield production.
Adapting treatment to the weather: Apply the copper shortly before periods of bad weather to ensure protection during an occurrence of rain for as long as possible. Repeat the treatment once the plants are dry again.
Tips
• Due to the purely protective effect of cupper, a regularly applied film on the upper and lower surface of the leaves is crucial for an effective protection of the potato plants. New application techniques (e.g. upper- and
lower-leaf sprayer) help in achieving a regularly applied copper film.
• New copper compounds give a better distribution on the leaf surface, as well as an increased rain-resistance, which enables lower dosages.
Summary translation
• Geringere Anreicherung von Kupfer im Boden.
• Geringere Schädigung der Kleinstlebewesen im Boden.
• Potenzielle Einsparung von Spritzmittel.
• Bessere Verteilung des Spritzmittels über die erforderliche Behandlungsdauer bis zum Ausschöpfen der zugelassenen Höchstmenge.
Vorgehen
Dosierung dem Befallszustand anpassen: Solange im Radius von 50 km kein Befall vorkommt, auf eine Behandlung verzichten. Nationale Informations- und Warndienste beachten: www.isip.at, www.isip.de bzw. www.phytopre.ch. Sobald ein erster Befall in der Region gemeldet wird, die Kartoffeln mit 200-250 g Reinkupfer pro Hektare schützen. Sind Kartoffeln in benachbarten oder eigenen Feldern von Krautfäule befallen, die Dosierung auf 800 g erhöhen und zwischen den Behandlungen nicht länger als eine Woche warten.
Dosierung dem Befallszeitpunkt anpassen: Wenn die Ertragsbildung zum Zeitpunkt der ersten Infektion schon weit fortgeschritten ist (in Europa oft nach Mitte/Ende Juli), die Kupferdosierung reduzieren oder auf sie verzichten. Zur Beurteilung der Ertragsbildung eine Probegrabung durchführen.
Behandlung der Witterung anpassen: Das Kupfer kurz vor Schlechtwetterperioden applizieren, damit der Schutz während eines Regenereignisses möglichst lange anhält. Die Behandlung wiederholen, wenn die Pflanzen wieder trocken sind.
Hinweise
• Aufgrund der rein protektiven Wirkung von Kupfer ist ein gleichmässiger Belag auf der Ober- und Unterseite der Blätter für einen guten Schutz der Kartoffelpflanzen entscheidend. Moderne Applikationstechnik (z.B. Ober- und Unterblattspritze) hilft, einen gleichmässigen Kupferbelag zu erzielen.
• Moderne Kupferformulierungen ergeben eine bessere Verteilung auf der Blattoberfläche und eine erhöhte Regenfestigkeit, was tiefere Dosierungen ermöglicht.
| EPrint Type: | Practice tool |
|---|---|
| What problem does the tool address?: | Copper is still the most effective permitted means of protection for plants against leaf blight in organic potato production. However, this heavy metal has the great disadvantage of accumulating in the soil and damaging soil organisms in the case of higher input. The annual maximum quantity of pure copper as specified by EU organic regulations is set at 6 kg per ha. For members of national organic associations lower maximum quantities may apply. |
| What solution does the tool offer?: | In order to minimise the negative effects of copper on the environment, and to avoid exceeding the current maximum quantities per hectare and year, the dosage of copper and the intensity of treatment can be adapted to specific levels of infection, as well as weather conditions. |
| Country: | Switzerland |
| Type of Practice Tool: | Practice abstracts |
| Theme: | Pest and disease control |
| Keywords: | arable farming, disease control, pest control |
| Keywords: | arable farming, plant disease control, pest control, root crops, potatoes |
| Agrovoc keywords: | Language Value URI English arable farming http://aims.fao.org/aos/agrovoc/c_36528 English plant disease control http://aims.fao.org/aos/agrovoc/c_5960 English pest control http://aims.fao.org/aos/agrovoc/c_5726 English root crops http://aims.fao.org/aos/agrovoc/c_6641 |
| Subjects: | Crop husbandry > Crop health, quality, protection Crop husbandry > Production systems > Root crops |
| Research affiliation: | European Union > Horizon 2020 > OK-Net Arable > OK-Net-Arable Tools Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Knowledge exchange > Advice European Union > Horizon 2020 > OK-Net Arable European Union > Organic Farm Knowledge |
| Horizon Europe or H2020 Grant Agreement Number: | 652654 |
| Related Links: | http://www.farmknowledge.org, https://organic-farmknowledge.org/tool/31028 |
| Project ID: | ofk |
| Deposited By: | Forschungsinstitut für biologischen Landbau, FiBL |
| ID Code: | 31028 |
| Deposited On: | 16 Jan 2017 13:52 |
| Last Modified: | 02 May 2024 10:31 |
| Document Language: | English, German/Deutsch |
| Status: | Published |
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