Divisi
Eggplant fruit and shoot borer
Leucinodes orbonalis · Insect
Photo: Donald Hobern · CC BY 2.0
The eggplant fruit and shoot borer (Leucinodes orbonalis) is the single most damaging pest of eggplant and African eggplant across warm, humid growing areas. The night-flying moth lays its eggs one by one on tender shoots, leaf undersides, flower buds and young fruit; the pale-pink caterpillars then bore inside — first killing the growing shoot tips, then tunnelling into buds and fruit, plugging their entry holes with frass (droppings) and rotting the fruit from within. Overlapping generations breed continuously wherever eggplant is grown, so the pest is present all season and stays hidden from sprays for most of its life.
Mally R, Korycinska A, Agassiz DJL, Hall J, Hodgetts J, Nuss M · CC BY 3.0 
Chirag85 · CC BY-SA 4.0
Why it matters
The fruit and shoot borer is the number-one pest of eggplant, and a bad attack can destroy up to 60% of your fruit — more than half your crop and your income. The caterpillars bore inside the shoots and fruit, where no spray can reach them, so once they are in, the shoot dies or the fruit rots from the inside and cannot be sold. Because it breeds all season and hides where you cannot see it, it is very hard to shift once it settles in — the only way to stay ahead is to catch it early and cut out infested shoots and fruit before the next generation hatches.
When to act
any wilted, drooping shoot tips, or the first bored fruit with an entry hole plugged by frass
This guidance is general, compiled from published agronomic references including FAO and CABI. Thresholds and timing shift with your crop, your variety and the season.
In much of the region a spray is simply called mushonga — medicine. But a chemical group you cannot name is one you cannot rotate, and a product you did not write down has no pre-harvest interval you can observe. Mushonga, and other farming words →
The full eggplant fruit and shoot borer field guide
- Identify it
- Scout for it
- Control it
17 field-guide sections in the app
The full guide to eggplant fruit and shoot borer — every symptom to check, how and when to walk your field looking for it, and the controls that actually work, ranked. Built into your crop plan, so you are told to look before it costs you a harvest.
Crops it affects
Frequently asked questions
How do I identify eggplant fruit and shoot borer?
The first sign (early) — a 'dead-heart': a young shoot tip suddenly wilts and droops as if it is thirsty, but only one shoot tip at a time while the rest of the plant stays green and firm. Watering does not revive it. That dying tip is called a dead-heart — look just below the droop for a small entry hole.
When should I take action against eggplant fruit and shoot borer?
any wilted, drooping shoot tips, or the first bored fruit with an entry hole plugged by frass
How do I control eggplant fruit and shoot borer?
Prevent it first (cultural) — start clean, stay clean. Plant only healthy, borer-free seedlings so you don't carry the pest in from the nursery. After harvest, pull out and destroy the old eggplant plants and residues instead of leaving them to shelter the next generation, and rotate the land to a non-host (a crop the borer can't eat — anything but eggplant or African eggplant). This is your strongest single defence, so lean on it hardest.
Which crops does eggplant fruit and shoot borer affect?
Among the crops covered here: African eggplant, Eggplant.
Catch it before it costs you a harvest
Divisi builds scouting into your crop plan — it tells you when to walk your field, what to look for at that stage, and what to do when you find it. Free for farmers, works offline.
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