The black cherry aphid (Myzus cerasi) is the main pest in modern organic table cherry production. In orchards with installed rain protection and insect nets, robust aphid populations can build up, leading to significant yield losses and tree damage (Picture 1, 2, 9).
Solution
The black cherry aphid can be indirectly and directly regulated. This practice abstract gives recommendations for direct regulation using kaolin, paraffin oil and pyrethrum+soap or azadirachtin at different periods of the aphid cycle. If possible, avoid any plant protection application after bloom to preserve the natural enemies.
Description
Minimisation of tree damage and fruit losses due to black sooty fungi growing on aphid honeydew (Picture 2).
Practical recommendations
Direct regulation
• Apply kaolin (Picture 4) in autumn to reduce the immigration of winged aphids from the secondary host back to the cherry tree (Picture 3).
• Apply paraffin oil in spring prior to bud break when fundatrices (or founding mothers) hatch from the winter eggs to further reduce the starting population in spring (Picture 5).
• Apply pyrethrum + soap or azadirachtin after bloom.
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