Michigan cherry growers faced a challenging year with cherry leaf spot, a major fungal disease. Frequent rains and fungicide resistance made control difficult, leading to high costs and poor results. Growers who sprayed early and often, ensuring excellent coverage, fared better.
MSU's Research to the Rescue
Michigan State University (MSU) researchers, led by George Sundin, are working to combat fungicide resistance in cherry leaf spot. The fungus produces massive amounts of spores, increasing the chances of resistance development. Several effective fungicides have become obsolete due to resistance, leaving growers with fewer options.
Severe attack of cherry leaf spot (source: Foglie TV - SL FRUIT SERVICE)
Copper as a Promising Solution
MSU trials have shown that certain copper-based fungicides, specifically Badge X2, Badge SC, and Kocide 3000, are effective against cherry leaf spot. Captan, another fungicide, also performed well. Researchers found that not all copper products are equal in efficacy, highlighting the importance of product selection.
Key Takeaways
Read full article on GrowingProduce
08 Nov 2023
The use of fludioxonil is authorised for post-harvest use but a growing body of evidence casts doubt on its classification as 'low risk' and the scientific community is calling for a re-evaluation.Consequently, possible alternative solutions are being explored.
03 Oct 2024
Although chemical pesticides have high antimicrobial power, their use is becoming restricted due to European regulations. One alternative is biocontrol, which uses antagonistic agents or metabolites generated by them to block the spread of unwanted organisms.
15 Jul 2025
The 2025 cherry season in the US Northwest brings excellent quality and large fruit sizes. Superfresh Growers leads exports to Asia and Oceania, India shows growing demand, while shipments to China decline due to trade tariffs and restrictions.
15 Jul 2025
A study conducted in China and the USA reveals that phenylactic acid (PLA) improves sweet cherry storage by extending freshness, aroma and nutritional quality. The optimal 8 mmol·L-1 concentration delivers strong results without damaging the fruit’s appearance.
