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Southern Rust: signs and treatment in Jamaica
An aggressive rust disease affecting corn in hot, humid climates. PlantArmor's crop guides list southern rust as a common problem on corn.
Signs to look for
- Small, orange-to-light brown circular pustules
- Pustules primarily on upper leaf surface
- Rapid yellowing and death of leaves
What to do
Crops it affects
Questions growers ask
How do I recognise southern rust?
An aggressive rust disease affecting corn in hot, humid climates. The signs to look for: Small, orange-to-light brown circular pustules. Pustules primarily on upper leaf surface. Rapid yellowing and death of leaves.
What should I do about southern rust?
Plant resistant hybrids. Apply systemic fungicides (e.g., Amistar) at the first sign of disease. Always read the product label and observe the registered rate, re-entry period and pre-harvest interval before you apply any pesticide.
Which crops are affected by southern rust in Jamaica?
PlantArmor's crop guides list southern rust as a common problem on corn.
Check it in the field
PlantArmor's reference library works offline, so you can compare what you are seeing against it standing in the plot, then log the spray you use along with its re-entry and pre-harvest intervals. Free to use.
This description and treatment come from the same reference library the PlantArmor app uses in the field. Pesticide registrations and permitted uses change — always read the current product label and observe the stated rate, re-entry period and pre-harvest interval.