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Fire blight infections will cause the flower cluster to wilt and then turn brown or black.

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nectarine thrips

When thrips feed inside the flower, the fruitlet is injured. As it grows, the fruit cracks and oozes gumming.

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md-trap

Orange delta traps with CM-DA Combo lures should be used with mating disruption.

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md-puffer

Puffers can be used in orchards greater than 30 acres.

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md-isomate

There are many different brands of mating disruption dispensers.

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Fire blight infections happen through flowers. Bacteria are spread from flower to flower by wind-driven rain, and by pollinating insects.

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The TRAPs website provides site-specific fire blight forecasts.

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apple-pm2

An optimal timing for powdery mildew fungicides is pink to open cluster stage.

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apple-pm

Comparison of flower cluster affected by powdery mildew next to a healthy cluster.

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sjs

San Jose scale overwinters as a mix of nymphs and adults on apple trees. Nymphs have “black caps”. Use oil alone or with pyriproxyfen (Esteem, for commercial...

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ptb-larva

Peach twig borer overwinters as larvae in crevices in the tree canopy on peach/nectarine. Use oil alone or mix with an insecticide. Good coverage is important.

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Pear psylla eggs

Pear psylla eggs. Adults lay eggs near buds in early spring. If this was a problem last year, apply oil twice, spaced about 7 days apart.

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peach-leaf-curl

Peach leaf curl is only treated by applying a dormant spray of copper, either in fall or spring. Fungal infections occur during leaf expansion in spring when...

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fire-blight

For fire blight, apply copper to apple/pear between swollen bud and green tip stages. It is OK to mix with 2% oil for the insect treatment. The primary purpose...

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eriophyid

All the tiny specks on this bud are eriophyid mites. Blister mites, peach silver mites, and rust mites are all eriophyid mites. They overwinter in bud scales...