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European canker (Neonectria ditissima): Direct control with lime water (BIOFRUITNET Practice Abstract)

{Tool} European canker (Neonectria ditissima): Direct control with lime water (BIOFRUITNET Practice Abstract). Creator(s): Brouwer, Gerjan. Issuing Organisation(s): Delphy. Biofruitnet Practice Abstract, no. 109. (2023)

[thumbnail of European canker (Neonectria ditissima): Direct control with lime water] PDF - Published Version - English (European canker (Neonectria ditissima): Direct control with lime water)
[thumbnail of Vruchtboomkanker beheersen met kalkmelk] PDF - Published Version - Dutch/Nederlands (Vruchtboomkanker beheersen met kalkmelk)

Document available online at: https://orgprints.org/46016

Summary in the original language of the document

Less infected parts of the tree requires less manual work for excising cankers, a healthier tree and a better yield with higher quality.
Practical recommendations
Direct measures
• Lime water is a basic substance in Europe. It is a fine suspension of lime in water. The average particle size is 3µm (Akdolit).
• Two products are described in the registration as basic substance. The product Neccal (Akdolit) contains 24% active ingredient (a.i.). The product Ulmer Kalkmilch contains 33% a.i. (36 % Münsterkalk with a.i. 92 %) and is used at the same rate as the lime water Akdolit.
• Application time for spray and sprinkler application is leaf drop starting at the end of October until the end of December. For brush application the application time is during the winter period till March.
• Infection occurs in autumn during prolonged wet periods and are common on wounds, such as leaf scars.
• Lime water should be used preventively, just before an infection period in autumn. Its high pH (11-13) prevents the germination of European canker spores. On the tree, calcium carbonate (pH 6-7) is formed with the CO2 from the air soon after application.
• With three treatments, a reduction of 50-75% can be achieved on the amount of newly formed cankers in June. The effectiveness can even reach 90% when up to seven sprays are applied. The more often, the better – dependent on the weather.
• Even with the use of lime water, preventive measures remain necessary, like manual labour for excising canker spots.
Spraying treatment
• Dosage 63-104 l/ha (maximum 728 l/ha) (24%) and 45-76 l/ha (maximum 532 l/ha) (33%), 2-7 times.
• Remove the pre-filter; the nozzles filters do not need to be removed. Turn on the pump and agitator and let it run. Spray everything all at once. Do not use more lime water than 10% of the water volume. So, at 1000 l/ha of water, maximum 100 l lime water can be added.

EPrint Type:Practice tool
What problem does the tool address?:European canker causes loss of fruiting branches and can cause fruit rot. The disease is mainly a problem in northwest Europe with a mild and humid climate (i.e., the Netherlands, Belgium, northern Germany and Scandinavian countries).
What solution does the tool offer?:Lime water (milk of lime, lime milk = calcium hydroxide, Ca(OH)2) is a basic substance in Europe. Combining direct control with preventive measures, hygiene and decision support systems can greatly reduce infestation.
Type of Practice Tool:Practice abstracts
Keywords:Disease control, apple and pear, European canker
Agrovoc keywords:
plant disease control
Subjects: Crop husbandry > Production systems > Fruit and berries
Crop husbandry > Crop health, quality, protection
Research affiliation: European Union > Horizon 2020 > Biofruitnet
Netherlands > Other organizations Netherlands
European Union > Organic Farm Knowledge
Horizon Europe or H2020 Grant Agreement Number:862850
Related Links:https://organic-farmknowledge.org/tool/46016, https://biofruitnet.eu, https://organic-farmknowledge.org/tool/46015
Project ID:ofk
Deposited By: Basler, Andreas
ID Code:46016
Deposited On:26 Apr 2023 10:09
Last Modified:02 May 2024 10:31
Document Language:English, Dutch/Nederlands

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