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Powdery Mildew

Common Name Powdery Mildew
Scientific Name Erysiphales - Podosphaera xanthii is the most common

Many different plants

Main Symptoms

White & dusty coating on leaves, stems and flowers


Spring Onwards

What is Powdery Mildew? 

Powdery mildew is a group of fungal diseases caused different fungi species and each one attacks a range of different plants. Thrives well in low humidty and moderate temperature environments or example greenshouses provide the ideal moist, temperate environment for the disease to spread. 


The symptoms of powdery mildew are very distinctive making it one of the easier plant diseases to identify. Plants that have powdery mildew have a white, dusty coating on leaves, stems and flowers as if they have been dusted with flour. It starts with powdery, circle white spots which will spread to cover most of the leaves or affected area of the plant. The fungal disease can cause the leaves, buds and growing tips to become twisted, disfigured or break, although this usually happens late into the growing season. 

The Problem

Powdery mildew thrives well in an agricultural or horticultural setting in greenhouses significantly impacting crop yields. The fungal disease takes away the plants nutrients which impacts the plant and therefore slows the growth of the plant. 

Control Of Powdery Mildew

The most effective way to manage powdery mildew fungal diseases is with fungicides. 

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    Amistar 5L

    Aazoxystrobin Broad Spectrum Fungicide

    £220.20 Inc VAT £183.50 Ex VAT

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