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Row Crop Disease Update June 16th

The “big” story in the world of row crop diseases in Georgia continues to be the equation:

Crop growth stage and development + very hot temperatures + dry with sporadic rainfall = disease risk.

For the peanut crop, these conditions could mean that growers will continue to see death from Aspergillus crown rot even as the peanut plants put some size on them.  Hot and dry soils help to fuel this disease.

Hot and humid could bring on early outbreaks of white mold.  Sclerotium rolfsii, the causal agent of white mold gets an early start with warm soils and some moisture.  Under hot and very dry conditions, we are increasingly likely to see “underground white mold” where the fungus and the disease wreak havoc just below the soil surface. White mold can be especially severe when night-time temperatures are 75F and above.

Conditions now are less favorable for early development and spread of early and late leaf spot on peanut.

Conditions are also less favorable for development and spread of SOYBEAN RUST.

Conditions are increasingly favorable for development and spread of SOUTHERN CORN RUST.