Peanut rust
Tiny orange to reddish brown pustules under the older leaves break open and shed a rusty powder.
Crops it strikes
What you see
When to act
From flowering, check the underside of the lower leaves every week. Start spraying at the first orange pustules if the crop still has more than a month to go before harvest.
What to spray
Active ingredients only, never brands. The FRAC group tells how it works: switch to a different group next time, so the disease does not learn to survive it. Spray only when the damage is worth the cost, and only with products registered with the Fertilizer and Pesticide Authority for your crop. Follow the label. The Shopee and Lazada links only show who sells something with that active ingredient, not a recommendation of any seller or product.
How to prevent it
- Plant a rust tolerant variety where one suits your area.
- Pull volunteer peanut plants between seasons. They carry rust from one crop to the next.
- Plant at the same time as your neighbors so no field stays green for rust to jump to.
- Rotate with grains and bury the old crop residue after harvest.
Where this comes from
Not sure it is this one?
Many diseases look alike. Send a photo to Anee, the smart farm technician in anee.io. She reads it with your crop, its age and the weather, and tells you what it most likely is and what to do first. In Tagalog or English.