Check for the Following Pests or their Damage: Fruit Development

On this page
Arthropods:   Diseases:
  • Beet armyworm
  • Green peach aphid
  • Leafminer
  • Pepper weevil
  • Thrips
  • Tomato fruitworm
  • Alfalfa mosaic virus disease
  • Cucumovirus mosaic diseases
  • Curly top
  • Impatiens necrotic spot
  • Potyvirus mosaic diseases
  • Pepper tobamovirus diseases
  • Phytophtora infected fruit
  • Powdery mildew
  • Tomato spotted wilt
  • Verticillium wilt
Names link to more information on biology and management. Click on photos to enlarge.
Mature beet armyworm larva found feeding inside a pepper fruit.

Beet armyworm damage

Identification tip:

Feeding is quite messy with webbing and frass.

Green peach aphids.

Green peach aphid adults.

Identification tip:

Generally pale green although some individuals may be pinkish. There are both winged and wingless forms.

Leafminer, Liriomyza sp., feeding in pepper leaves can lead to extensive mining and blotching.

Leafminer damage.

Identification tip:

Larvae mine between upper and lower leaf surfaces, creating winding, whitish tunnels that widen as the larva grows and eventually cause necrosis.

Pepper weevil grubs are off-white with a brown head and feed in the core of pepper pod.

Pepper weevil larva damage.

Identification tip:

Larvae feed within the fruit, usually at the seed core and fill the fruit with frass.

Thrips feeding can cause pepper leaves to curl and crinkle.

Thrips damage.

Identification tip:

Thrips feeding distorts foliage and can cause leaves to curl and pucker.

Beet armyworm feeding in the core of the pepper fruit.

Tomato fruitworm damage.

Identification tip:

The larvae burrow into the fruit and feed on the seed core or flesh depositing frass. Infested fruit decay.

Pepper leaves showing a yellow mosaic caused by Alfalfa mosaic virus.

Alfalfa mosaic virus symptoms.

Identification tip:

Leaves of infected plants have distinct yellow or whitish mosaic patterns.

Discolored and distorted chili pepper fruit with a bumpy surface caused by Cucumber mosaic cucumovirus.

Cucumovirus mosaic diseases.

Identification tip:

Infected chilies are distorted and have a bumpy surface.

The internodes of pepper plants infected with Beet curly top geminivirus are short, resulting in extremely stunted plants.

Curly top symptoms.

Identification tip:

Internodes of infected plants shorten, resulting in extremely stunted plants. The upper portion resembles a rosette or small flower bouquet. Leaves turn yellow or light green and may roll upward.

Photo not available

Impatiens necrotic spot symptoms.

Identification tip:

Fruit show chlorotic spots, red or green areas surrounded by yellow halos, and concentric rings that may become necrotic. Symptoms are similar to those caused by another tospovirus, Tomato spotted wilt virus.

Pepper plants infected with Potato Y potyvirus.

Potyvirus mosaic diseases.

Identification tip:

Fruit may be misshapen and have a bumpy surface. It can be difficult to distinguish fruit with cucumber mosaic disease from those with potyviruses.

Mottling of tomato leaves due to tobacco mosaic virus.

Pepper tobamovirus diseases.

Identification tip:

Although symptoms vary among cultivars and virus strains they generally include necrosis on any plant part, defoliation, leaf distortion, and/or mosaic symptoms on leaves, stems, and eventually fruit.

Water-soaked patches on bell pepper fruit characterstic of a Phytophthora capsici infection.

Phytophthora infected fruit.

Identification tip:

Fungal spores from crown and root rot can splash on fruit and cause it to decay. Symptoms include water-soaked patches that dry up and form lesions.

Underside of pepper leaf showing growth of the powdery mildew fungus, Leveillula taurica.

Powdery mildew.

Identification tip:

A patchy, white, powdery growth enlarges on the lower leaf surface and at times on the upper surface.

Distorted and spotted jalapeno fruit infected with Tomato spotted wilt virus (left) compared with healthy fruit (right).

Tomato spotted wilt virus symptoms.

Identification tip:

Infected fruit may have mosaic patterns or spots.

Brown and wilted leaves on red bell pepper characteristic of a Verticillium dahliae infection.

Verticillium wilt symptoms.

Identification tip:

Symptoms include yellowing and drooping of leaves on a few branches or on the entire plant. Brown discoloration is visible when the roots and lower stem of a wilted plant are cut open. Symptoms are unlikely to be seen in seedlings.


Top of page

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2016 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/C604/m604fppestdamage.html revised: June 24, 2016. Contact webmaster.