What goes wrong with sweet pepper in Jamaican conditions, how to recognise it early, and what the crop needs at each stage. 6 common problems covered.
Common sweet pepper pests and diseases
Pepper Weevil
The most destructive pepper insect pest. Larvae feed inside the fruit.
Signs to look for
- Premature dropping of buds and young fruit
- Small puncture holes in fruit
- Rotting and internal feeding damage
What to do: Collect and destroy all fallen and damaged fruit every few days: the larvae grow inside the fruit, where no spray reaches. Remove nightshade weeds that host it. No product in the app lists pepper weevil on its label, so ask your agro-dealer for one that does, and time sprays to flowering, when the adults lay eggs.
More on pepper weevil →
Thrips
Tiny, slender insects that rasp plant tissue and suck the sap. Major vectors for viruses.
Signs to look for
- Silvery, stippled scarring on leaves
- Tiny black specks of frass
- Distorted flowers and scarred fruit
What to do: Apply a product whose label lists thrips, such as Cure or Vertimec (abamectin), Pegasus or Selecron, rotating groups. Use blue sticky traps for monitoring.
More on thrips →
Anthracnose
A fungal disease thriving in warm, humid conditions causing destructive lesions on leaves and fruit.
Signs to look for
- Sunken, dark circular lesions on fruit
- Pinkish spore masses in lesions during wet weather
- Leaf spotting and dropping
What to do: Apply preventative fungicides (Mancozeb, Azoxystrobin). Improve airflow and avoid overhead watering.
More on anthracnose →
Phytophthora Root Rot
A soil-borne water mold causing rapid wilting and collapse of plants in poorly drained soils.
Signs to look for
- Sudden wilting despite moist soil
- Dark brown to black decayed roots
- Dark lesion girdling the stem base
What to do: Improve drainage. Apply metalaxyl (e.g., Ridomil Gold MZ) as a soil drench. Avoid overwatering.
More on phytophthora root rot →
Blossom End Rot
A physiological disorder caused by a lack of calcium reaching the fruit, usually triggered by inconsistent watering.
Signs to look for
- Large, leathery, sunken black patch on the bottom of the fruit
- Fruit ripens prematurely
What to do: Maintain consistent soil moisture. Apply Calcium Nitrate via fertigation. Do not over-apply Nitrogen.
More on blossom end rot →
Mosaic Viruses
A complex of viruses causing mottled leaves and stunting, typically vectored by aphids or mechanical transmission.
Signs to look for
- Mottled light/dark green patches
- Stunted growth
- Distorted fruit shape
What to do: Control aphid populations. Remove infected plants. Do not handle wet plants.
More on mosaic viruses →
Questions growers ask
What are the most common sweet pepper pests and diseases in Jamaica?
The problems growers report most often are Pepper Weevil, Thrips, Anthracnose, Phytophthora Root Rot, Blossom End Rot, Mosaic Viruses. Each one is described above with the symptoms to look for and the recommended response.
What soil pH does sweet pepper need?
Sweet Pepper performs best in soil with a pH between 6 and 6.8. Outside that range nutrients become progressively less available to the plant even when they are present in the soil.
How long does sweet pepper take to grow?
Counting from transplant, the seedling stage runs to about day 14, vegetative growth to about day 45, and flowering to about day 70, after which the crop moves into fruiting or bulking.
Pest descriptions and treatments above come from the same reference library the PlantArmor app uses in the field. Pesticide registrations and permitted uses change — always read the current product label and observe the stated rate, re-entry period and pre-harvest interval.
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