Rambutan powdery mildew
White powdery growth covers young flushes, flowers and young fruits, which turn brown, grow short spines, stay small and drop.
Crops it strikes
What you see
When to act
From bud break, check new flushes and flower clusters twice a week, mostly in dry months with cool, dewy nights. Act at the first white powder on flowers or young fruit. Once young fruit turn brown and drop, the loss is done.
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
- Prune after harvest so light and air reach the inner canopy.
- Cut out and burn badly hit flower clusters and young shoots.
- Feed balanced fertilizer. Too much nitrogen gives soft, lush flushes that mildew loves.
- Keep trees watered in dry spells, so flowering stays even and short.
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.