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.
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.