Bacterial spot
Small water soaked spots on the leaves turn brown with dead centers, and fruits get raised, rough, scabby spots.
Crops it strikes
What you see
When to act
Check leaves and fruit every week, more often after storms. Start copper with mancozeb sprays at the first small, dark, greasy spots in wet weather. Dry season crops rarely need them.
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.
Resistance: Copper resistant strains of the bacteria are common in many countries, Asia included. Tank mix copper with mancozeb, and never use antibiotics on the field.
How to prevent it
- Sow clean seed. Soak doubtful tomato and pepper seed in hot water at 50 degrees Celsius for 25 minutes.
- Plant only spot free seedlings, and raise them in clean trays away from older plantings.
- Rotate for two years away from tomato, pepper and eggplant, and remove volunteers and crop debris.
- Water at the base, not over the leaves, and stay out of the field while the plants are wet.
- Plant a resistant variety where one is sold, and stake plants so leaves dry fast.
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.