Troubleshooting
Santol problems — and how to fix them
Santol (Sandoricum koetjape) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Scale insects
Several scale species (soft scales, armoured scales) infest branches and leaves, producing honeydew and associated sooty mould. Treat with horticultural oil sprays (neem or white oil) applied to thoroughly coat affected surfaces. Prune heavily infested branches and improve air circulation.
Fruit fly infestation
Bactrocera species fruit flies lay eggs in ripening fruit, causing internal rot and premature drop. Use protein bait traps, exclusion bags on developing fruits, and harvest promptly. In high-pressure areas, monitor with yellow sticky traps and apply approved bait sprays.
Powdery mildew on young foliage
White powdery coating on new leaves during dry conditions with warm days and cool nights. Improve air circulation through canopy thinning. Apply sulphur-based fungicide or neem oil spray at first sign. Maintain adequate irrigation, as drought-stressed trees are more susceptible.
Prevent santol problems before they start
Most santol issues are care-mismatch, not bad luck. Dial in the basics:
Santol problems — FAQ
Why is my santol scale insects?
Several scale species (soft scales, armoured scales) infest branches and leaves, producing honeydew and associated sooty mould. Treat with horticultural oil sprays (neem or white oil) applied to thoroughly coat affected surfaces. Prune heavily infested branches and improve air circulation.
Why is my santol fruit fly infestation?
Bactrocera species fruit flies lay eggs in ripening fruit, causing internal rot and premature drop. Use protein bait traps, exclusion bags on developing fruits, and harvest promptly. In high-pressure areas, monitor with yellow sticky traps and apply approved bait sprays.
Why is my santol powdery mildew on young foliage?
White powdery coating on new leaves during dry conditions with warm days and cool nights. Improve air circulation through canopy thinning. Apply sulphur-based fungicide or neem oil spray at first sign. Maintain adequate irrigation, as drought-stressed trees are more susceptible.