Defect and tolerance
Thrips ring scar, and the display it empties
Thrips larvae feed under the sepals of very young fruit. As the fruit swells, the damaged tissue travels outward from beneath them and finishes as a ring of grey scarring around the button. Internal quality is untouched, which is what makes this defect cosmetic and expensive at the same time.
The figures
| What causes it | Citrus thrips larvae puncturing epidermal cells, the second instar doing most of the damage |
|---|---|
| Where they feed | At the calyx end, under the sepals of young fruit |
| Why it forms a ring | Damaged rind moves outward from beneath the sepals as the fruit expands |
| Window of susceptibility | From petal fall until the fruit is roughly 37 mm across |
| How it looks | Scabby grey or silvery scarring on the rind |
| Effect on the fruit inside | None on internal quality or flavour |
| Under the standard | Skin defects formed during the growth of the fruit, such as pest damage, permitted slight in Class I and permitted in Class II |
What it changes on an order
You sell loose fruit from an open display
Here the standard and the shopper part company. Class I permits the mark and the hand reaching into the display goes around it, so a compliant lot still sits there at the end of the day.
Your channel never shows the whole fruit
Juice, catering and net bags all hide it completely. A scarred lot is frequently the cheapest honest fruit on the market, and buying it is a way of paying for the inside rather than the outside.
You are writing acceptance criteria that two teams will apply
The ring has a constant position and a recognisable shape, which makes it unusually easy to describe in writing. Most defects on a citrus pallet are harder to pin down than this one.
What this note does not settle
- Thrips scarring and wind scar both end as healed grey marks, and the standard grades them under different clauses even though they land in the same class.
- No size limit for the ring appears anywhere in the standard. The word slight is left to the inspector.
- We carry out no thrips monitoring that we could report, and the grower has confirmed no orchard records.
Source: Commission Delegated Regulation (EU) 2023/2429, Annex I Part B Part 2 (specific marketing standard for citrus fruit), UC IPM Pest Management Guidelines, Citrus thrips
The ring records how big the fruit was
Read the scar backwards and it tells you when it happened. Larvae fed beneath the sepals of a fruit no bigger than a marble; the tissue they damaged then travelled outward as the orange expanded, ending as a band around the button. Its diameter is a rough record of the size of the fruit on the day of the attack. Few blemishes anywhere are that legible.
Underneath, nothing changed at all. Juice, sugars, acidity and flavour are precisely what they would have been. This is the purest cosmetic defect on a citrus pallet and also among the most expensive, a combination that irritates everybody involved for good reason.
The channel decides the cost, not the fruit
On an open display a shopper's hand goes past a scarred orange and takes the one behind it. Nothing about that behaviour is irrational and nothing about it can be argued with. In a bagged pack, a juice line or a hotel kitchen, the identical fruit performs identically to a clean one, and the discount turns into margin.
Buyers with more than one outlet hold a real advantage here and mostly fail to use it. Scarred lots are cheap because most of the market wants them for one narrow purpose, so whoever can place them elsewhere is buying inside quality at outside prices.
Talk to the grower
Tell us the variety, the sizes and the delivery week you need. You get a delivered price and what we can commit to in writing, from the person who picks the fruit.
The grower handles enquiries. Response times are still to be confirmed.