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Pear gall midge (Contarinia pyrivora), too small to see (BIOFRUITNET Practice Abstract)

{Tool} Pear gall midge (Contarinia pyrivora), too small to see (BIOFRUITNET Practice Abstract). Creator(s): Brouwer, Gerjan and Kemp, Sarah. Issuing Organisation(s): Delphy. Biofruitnet Practice Abstract, no. 059. (2023)

[thumbnail of Pear gall midge (Contarinia pyrivora), too small to see] PDF - Published Version - English (Pear gall midge (Contarinia pyrivora), too small to see)
[thumbnail of Perengalmug (Contarinia pyrivora): te klein om te zien] PDF - Published Version - Dutch/Nederlands (Perengalmug (Contarinia pyrivora): te klein om te zien)
[thumbnail of Birnengallmücke (Contarinia pyrivora), zu klein zum Sehen] PDF - Published Version - German/Deutsch (Birnengallmücke (Contarinia pyrivora), zu klein zum Sehen)

Document available online at: https://orgprints.org/45946


Proper timing of control methods provides better
Practical recommendation
Pest monitoring
• In the UK, the Netherlands, Belgium and Italy pheromone blends of the pear gall midge were tested (2018 and 2022). The right pheromone blend is identified and was consistent in all trials.
• The use of lures with a specific pheromone in traps is a sensitive and accurate means of monitoring the short and often intense emergence period of adult midges.
• Transparent traps are most successful at catching midges for monitoring.
• Hang the monitoring traps early March in the orchard.
Preventive measures
• Removal of young, infested fruits in May, before the fruits and larvae fall on the soil.
Direct measures
• Pyrethrine (when allowed in your country).
• Spinosad (when allowed in your country) – however, this has negative side effects on beneficial insects.
• Mineral oil (not very effective).
Mass trapping
• Mass trapping with 100 pheromone traps/ha showed no reduction in damage in trials carried out in the Netherlands (2021-2022) and Italy (2022).
• The pheromone could possibly also be used for mating disruption during the short period of adult emergence. This could be researched in the future.

EPrint Type:Practice tool
What problem does the tool address?:Pear gall midge is a small midge of ca. 4 mm. It causes deformation and loss of fruits in all pear varieties. There is a difference in varieties depending on tree development. In Italy late flowering varieties are more sensitive (e.g., Williams Kaiser). The flight of midges is very early in season and often not noticed. It is an increasing pest of pears. The population builds up over years and the harvest can be greatly reduced.
What solution does the tool offer?:Pheromone-baited traps can be used to monitor emergence of the pest to time control measures more precisely. Mass trapping of pear gall midge proved ineffective.
Type of Practice Tool:Practice abstracts
Keywords:Pest control, pear, pear gall midge
Agrovoc keywords:
pest 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
Horizon Europe or H2020 Grant Agreement Number:862850
Related Links:https://organic-farmknowledge.org/tool/45946, https://biofruitnet.eu
Project ID:ofk
Deposited By: Basler, Andreas
ID Code:45946
Deposited On:26 Apr 2023 07:24
Last Modified:27 Apr 2023 11:14
Document Language:English, German/Deutsch, Dutch/Nederlands

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