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Fungicide Sensitivity of Apple Scab 2010 - Cornell University No samples will be accepted after Wedn

Fungicide Sensitivity of Apple Scab 2010 - Cornell University No samples will be accepted after Wedn-2025

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The document outlines the procedures for submitting apple leaves for fungicide sensitivity testing related to apple scab, including submission deadlines, contact information, and required forms. It specifies details needed from participants such as orchard history, fungicide usage, and willingness to participate in future pesticide demonstration trials.

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What is the best way to treat apple scabs?

Myclobutanil (Spectracide Immunox Multipurpose Fungicide Spray Concentrate) is a synthetic fungicide that is effective against apple scab. You can apply it any time from green tip until after petal fall.

How often should I spray my apple trees?

Generally, we recommend to start spraying around 7 to 10 days after petal fall. Then continue every 7 to 10 days throughout the growing season. However, its important to monitor the weather conditions, as heavy rainfall may require additional spraying.

Is there a systemic treatment for apple scab?

Control Apple Scab Fungus Use Fertilome Liquid Systemic Fungicide, Immunox, Systemic Infuse, and liquid Copper. Six or more sprays are recommend- ed at 7-10 day intervals. If it rains within 6 hours of spraying, you should re-spray.

What is the best organic apple scab treatment?

Several fungicides are available for controlling apple and pear scab. These include fixed copper, Bordeaux mixtures, copper soaps (copper octanoate), sulfur, mineral or neem oils, and myclobutanil. All these products except myclobutanil are considered organically acceptable.

What is the best fungicide for scab in apple?

At bud burst, dithianon or dodine may be used because of protectant action against Neonectria canker. Similarly, at green cluster/pink bud a DMI fungicide is usually selected because of its dual action against scab and powdery mildew.

Does copper fungicide treat apple scab?

Some organic fungicides for apple scab control during this period include: Copper should be applied before the quarter-inch green stage; one or two pre-bloom copper applications can be made.

What chemicals are used to apple scabs?

Materials available to home growers for scab control in edible apples and crabapples include captan, lime-sulfur and powdered or wettable sulfur. Applications of lime-sulfur closely following captan sprays can damage leaves and flower buds, so use caution when rotating these two materials.

How often should I spray for apple scab?

Instead, fungicide application must begin in early spring from apple green tip, and continue on a 7- to 10-day schedule (7 days during wet weather, 10 days if dry) until petal fall. If dry weather persists after petal fall, a 10- to 14-day spray schedule is adequate for scab control.