Skip to content
Contact us

Plant Diseases

Featured news & events

Koppert launches Timing Expert, a new decision-support tool in Koppert One
Limonica Ulti-Mite nominated for GreenTech Innovation Award 2026
Koppert benoemt Hans Peters tot Chief Executive Officer
Koppert appoints Hans Peters as Chief Executive Officer
Koppert showcases tech‑driven innovations at GreenTech Amsterdam 2026
Biological control gains ground in sweet pepper cultivation
  • Jump to:
  • Common diseases
  • Search
  • News

Common plant diseases

Plant diseases in horticulture and agriculture are conditions or disorders that negatively affect the health and productivity of cultivated plants, including crops and ornamental plants. These diseases are caused by various pathogens, including fungi, bacteria, viruses, and nematodes, as well as environmental factors. Here's an overview of common plant diseases in both horticulture and agriculture. Looking for a specific species? Take a look at our plant disease overview.

Basal rot Fusarium oxysporum grown in petri dish

Fusarium spp.

Fusarium spp.
Black rot on carrot Alternaria radicina damage symptoms on carrot

Black rot of carrots

Alternaria radicina
Potato infected by blackleg disease Erwinia carotovora Pectobacterium carovora

Bacterial soft rot, bacterial stem rot

Pectobacterium carotovorum
Banana plant damage caused by Black Sigatoka disease Mycosphaerella fijiensis

Black sigatoka disease

Mycosphaerella fijiensis
Pepper damage caused by Stem and fruit rot of Capsicum Phytophthora capsici

Blight of pepper

Phytophthora capsici
Damage on tomato caused by powdery mildew

Powdery mildew

Erysiphe, Podosphaera, Oidium, Leveillula spp.
Black-leg of seedlings Pythium ultimum in petri dish

Damping-off

Pythium aphanidermatum
Tomato damage caused by Bacterial wilt of potato Ralstonia solanacearum

Bacterial wilt, brown rot

Ralstonia solanacearum
Loose Wheat Smut Ustilago nuda tritici

Loose smut of wheat

Ustilago tritici

Search plant diseases

Solution Finder

The right solution for your crop

Questions or need help?

Contact us

Questions or need help?

Contact us

The latest news about diseases

Effective control of foliar grapevine diseases with Tiagan

Nodokare: The New Standard in Biostimulants

Acadian Organic: Engineered for ROI.

Acadian™: The Gold Standard in Biostimulants

PhylloKare™ Organic

Integrating biocontrol solutions with IPM strategies

Soil-borne diseases in row crops: A growing threat to crop health and yield

Trial results Onion fly and Fusarium wilt

Trial results show Trianum is your key to a healthy carrot crop

Cedress and Trianum, the winning combination to control seed & soil-borne diseases in carrots

Control Powdery Mildew with Lumiere

Trianum: new package – same quality

2024 global trial season highlights value of biological solutions in outdoor crops

Biological crop protection opportunities for integrated pest management (IPM) in citrus

Returning favourites and new innovations: Registration opens for Koppert’s Outdoor Experience Centre

Cerall: 100% biological seed treatment against fungal diseases

Cerall Brochure

BioSulfur-S: Healthier crops, effortless application

Trianum effectively controls Pythium in cucumber

Towards a chemical-free future in agriculture: The vision of grower Koen

Need help?

Find a solution Contact an expert Find a reseller Join Koppert One
Need help?