Sooty Blotch and Fly Speck (Apples & Pears)

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Sooty Blotch

and Fly Speck (Apples & Pears)

Description: These two diseases often occur together because

they have similar, and numerous, wild hosts.

Sooty blotch and fly speck are most likely to develop

when temperatures are between 65° and 80°F and when

humidity is high. This combination occurs most frequently

when nighttime temperatures remain above 65° to 70°F

during summer, or during extended warm rainy periods.

Sooty blotch and fly speck infections which are not

yet visible at harvest can develop during storage.

Solution: Spray

Soap-Shield® Fungicidal Soap

when disease first appears, and repeat at 7-10 day intervals

for as long as needed. For optimum control, begin spraying

2 weeks before disease normally appears, or when temperature

and humidity conditions favor disease establishment.

If summer diseases such as sooty blotch and fly speck

have been a serious problem in past years, dormant sprays

of Soap-Shield or Liquid Copper, applied in early spring,

may help eradicate over-wintering infections that became

established on twigs the previous season.

NOTE: If used frequently, Soap-Shield may cause leaf

burn. If leaf burn develops, discontinue Soap-Shield

sprays, and use Micronized Sulfur instead.

 


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