Category Archives: Fungicides for apples

New Considerations for Controlling Bitter Rot on Apples

In previous commentary, fungicides recommended for control of bitter rot in the Northeast included captan, ziram, and QoI fungicides, but continued dependence on the latter is probably neither sustainable nor advisable. Read my recent article published in Scaffolds Fruit Journal for the rationale … Continue reading →

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Scary Weather for Apple Diseases

Friday, May 16, 2014: The current weather pattern is generating high risk for a number of apple diseases: Fire blight risks have been very high through much of the last week.  I have not gone back through our historical records, … Continue reading →

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Apple Disease Control at Petal Fall

Wednesday, 14 May 2014: Petal fall is a really critical time for apple disease control.  Trees are rapidly generating new disease-susceptible terminal leaves, and fruitlets are at peak susceptibility for infection by fungi causing scab, rust, blossom-end rots, moldy core, … Continue reading →

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Apple Scab/Mildew Threats

Monday afternoon, May 12, 2014:  According to the best apple scab models, major ascospore discharges and infection periods occurred April 29-May 2 and again May 8-11.  If current weather forecasts are accurate, we will experience the third really major apple … Continue reading →

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Fungicide Strategies after the Rain

Thursday morning, May 1, 2014:  Rains over the past two days exceeded 2 inches and have almost certainly removed all protection from fungicides that were applied prior to the rain.  Orchards that were sprayed after Saturday morning of last week … Continue reading →

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