Check these first
- Does the rot start at the blossom end or from a wound?
- Was there heavy rain or uneven watering just before the fruit split?
- What were the temperatures and pollination conditions when it flowered?
Most likely causes
From the pests and diseases recorded for this plant, the ones whose symptoms match, most serious first. Symptoms alone rarely confirm a cause, so use the linked page to check the signs and treatment.
Helicoverpa Bollworms
Round holes are bored into fruit and buds, the inside eaten out and packed with frass. Rot spreads from the entry hole, leading to fruit and bud drop.
How to identify and treat: Helicoverpa BollwormsSpider Mites
Fine white stippling spreads across the upper leaf surface, and the leaf eventually whitens and dies back. In heavy infestations fine webbing appears on leaf undersides and shoot tips.
How to identify and treat: Spider MitesBlossom End Rot
The blossom end of the fruit turns water-soaked, then dark brown, and sinks in. It is most common on fruit in the sizing stage, and secondary rot often follows.
How to identify and treat: Blossom End RotOther possible causes
The three above are the causes on record for this symptom.
Other symptoms on this plant
What other growers did about it
A page like this one can tell you what green chili pepper fruit cracking, rot and deformities is and what to try. What it cannot tell you is what actually happened to someone who had it on the same plant, at the same point in the season, and what they did next.
Gadenin is a free garden journal built around that. You photograph the plant, tag what you are seeing, and the entries line up by date for each plant you grow.
- Tag the problem and the app tells you how many other growers have logged the same thing on the same plant.
- Growers who make their records public can be followed, so you can read what they did and how it turned out.
- Next season your own entries come back at the same point in the year, so you check the plant before it starts.
Free on iPhone. Recording, tagging and reading public records cost nothing.