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Crop diseases in the horticultural sector

Diseases often cause problems in crops and can do serious damage. They often cause rotting and wilting, which can cause a plant to die completely. Each disease requires a specific control. Click through and read more about the damage situation and how to combat the diseases.


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  • Botrytis Cinera - Grey Mold

    Botrytis is a fungus and is the largest cause of damage in horticulture. This fungus is also known as Botrytis cinerea, grey rot, grey mould, mould fungus or tomato plant disease. The fungus is mainly found in crops with a high humidity.

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  • Fusarium

    Fusarium oxysporum, also known as tomato wilt or Fusarium wilt, is soil fungus which is common in greenhouse crops. Almost every crop has specific type Fusarium, but this fungus is mainly a problem in cucumber, pepper, tomato, pot plants and cut flowers.

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  • Phytophthora

    Phytophthora, or Phytophthora root rot, is a mould which is difficult to control and damages tomatoes and peppers. The fungus is most common in warm and humid conditions. The traces quickly spread around the greenhouse. This increases the risk of contamination of large parts of the crop.

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  • How to control Powdery Mildew in greenhouses?

    Powdery Mildew is the collective name for a group of fungi that grow on green plant parts mostly in greenhouses.

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  • Mucor on strawberries

    Mucor is a collective term for various species of fungi. The fungus Mucor occurs in many crops, but is mainly found in strawberry and soft fruit crops. Since control is not possible, hygiene is very important to keep mucor out of the greenhouse to minimize the risk of production loss.

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  • Pythium

    Pythium – also known as root rot – is a plant disease that particularly affects young and soft plant tissue. Through small wound the Pythium disease penetrates the plants.Especially in a humid environment the Pythium disease spreads rapidly.

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  • Strawberry Leaf Spot

    White spot disease in strawberries: Identify & control white spot disease. Characteristic white, reddish-brown bordered spots on the leaves of strawberry plants.

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  • Powdery mildew on strawberries

    Podosphaera aphanis, also known as strawberry mildew, is a powdery mildew that grows on strawberries. You can identify powdery mildew by curled leaf margins and fine white fungal mycelium on the underside, as well as irregular light purple spots.

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  • How to control Downy Mildew in greenhouses?

    The fungal fluff of downy mildew is on the underside of the leaf, unlike powdery mildew, which is also on top of the leaf.

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  • ToBRFV

    ToBRFV belongs to the genus of the Tobamoviruses which also includes tomato mosaic virus (ToMV) and tobacco mosaic virus (TMV). The virus spreads mechanically through people and tools, but also through bumblebees, birds and infected fruits.

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  • Tomato leaf curl

    The Tomato Leaf Curl New Delhi Virus (called ToLCNDV) is a Begomovirus that occurs in several horticultural crops, including tomato, capsicum, chili pepper, cucumber, eggplant and zucchini. This virus causes major damage especially in tomato and zucchini crops.

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  • Tomato spotted wild virus (TSWV)

    The Tomato spotted wild virus (TSWV) is a plant disease that affects plants such as tomatoes, eggplant, lettuce and various ornamentals. The virus is spread in different ways. The major transmitter is thrips.

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What plant diseases are there?

Plant diseases can be caused by different types of pathogens. Think of fungi, bacteria and viruses. Depending on the type of pathogen, different treatment methods are used.

In addition, the different plant diseases attack different parts of the plants. For example, a differentiation can be made between leaf diseases (e.g. rust fungi, powdery mildew and brown rot), shoot diseases (e.g. peak drought) and root diseases (such as Verticillium wilt and crazy roots).

At the top of the tab, select the area you would like information about. Are you looking for information on a specific plant disease that is not yet listed in our knowledge base? Then feel free to contact us. Our plant protection specialists will be happy to advise you and find a suitable, individual treatment method for the plants in your horticultural business.

In our knowledge database you will also find an overview of all common pests in German horticulture.



Prevent plant diseases
Combating plant diseases is often time-consuming and expensive. In addition
Hygiene has become an important issue in greenhouse horticulture in recent years. Although disinfecting the greenhouse reduces the risk of unwanted plant diseases and pests, it is important to also consider any plant diseases that can enter through people, machinery and tools. Hygiene measures of personal hygiene and the disinfection of means of transport contribute to this.

Hand disinfection is an important aspect of industrial hygiene. Plant diseases and pests can easily spread through hands and then cause damage to crops. Strict hand hygiene reduces this risk.



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