Papaya bacterial crown rot
Angular water soaked spots on leaves and leaf stalks spread into a soft rot of the crown, the top of the plant collapses, and fruits get firm sunken spots.
Crops it strikes
What you see
When to act
In wet, windy weather, walk the field twice a week and look for water soaked angular spots on leaves and leaf stalks near the crown. Remove a plant at the first soft rot at the top. Do not wait for a second one.
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.
No spray reliably cures it. Cut out and bury sick plants at once, avoid wounding plants, clean your tools and plant tolerant lines.
How to prevent it
- Cut out sick plants the same day, bury them deep or carry them off, and only then think of spraying the rest.
- Avoid wounding leaves and stems. Remove old leaves with a clean cut in dry weather.
- Dip knives in household bleach mixed with water between plants.
- Plant tolerant varieties where the disease is common, and buy seedlings from clean nurseries.
- Do not plant new papaya next to sick blocks, and plant in drier months when you can. The bacterium spreads in wind and rain.
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.