Root Crops
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Yam and rhizome scale
Tubers and rhizomes, most often in storage, are crusted with tiny round gray to brown scales, then shrivel and sprout poorly.
Crops it attacks
Where the damage shows
At the roots, tubers or base
When to act
Check every seed rhizome and tuber at harvest and before planting. Any piece with grey or white crusts should not be planted.
Before you spray
Field sprays do not reach them. Keep only clean seed tubers and rhizomes, discard crusted ones, and store them dry and airy.
How to prevent it
- Plant only clean seed tubers and rhizomes. Throw out or burn any piece with a crust of scales.
- Store seed pieces dry, airy and shaded, on racks or slatted shelves, not in heaps on a damp floor.
- Do not plant ginger, turmeric or ubi after one another in the same field.
- Clean the store and old sacks before the new harvest goes in.
Natural enemies and biological help
- Small wasps and lady beetles feed on the scales. They work best where stores and fields are not sprayed.
Where this comes from
Not sure it is this one?
Many pests 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.