What pests attack green beans?

Black Bean Aphid (Blackfly), Broad mite, Chafer grubs, Leaf Miner, Two-spotted spider mite, Whitefly

What diseases affect green beans?

Fusarium wilt, Grey mould, White mould (Sclerotinia), Anthracnose, Rust

Green Beans pests and diseases: how to recognise them

Q: Which green beans problems need quick action?

Fusarium wilt: A cut stem shows brown or reddish-brown water-conducting tissue — lines lengthways, dots or a ring in cross-section. Grey mould: On strawberries, grapes and other soft fruit a soft brown rot, often as the fruit ripens; on gooseberries whole branches die. White mould (Sclerotinia): Later, hard black seed-like bodies (sclerotia) 0.5–1 cm across in the mould and inside hollow stems.

Phaseolus vulgaris

The pests, diseases and disorders recorded for green beans in our library, each with a photo and its first symptom. Every page has the full list of symptoms, organic and chemical treatment and prevention.

At a glance

Problems in total	11
Pests	6
Diseases	5
Need quick action	3

How to grow green beans · All pests and diseases

Pests

Black Bean Aphid (Blackfly)Distorted shoots and stunted plants; broad beans set fewer pods, and flowers of dahlias and nasturtiums can be damaged.Also called: blackfly, bean aphidPhoto: Sascha Kohlmann from Berlin, Deutschland, CC BY-SA 2.0, Wikimedia Commons
Broad miteGrowing tips and buds are killed and new growth is stunted — easily mistaken for disease or herbicide damage.Photo: David Riley, University of Georgia, Bugwood.org, CC BY 3.0, Wikimedia Commons
Chafer grubsPotatoes, beetroot and other root crops have large, shallow, round holes.Photo: Сарапулов, CC BY 4.0, Wikimedia Commons
Leaf MinerHeavily mined leaves dry up or drop early; badly affected tomato plants can lose most of their leaves.Photo: Flowersabc, CC BY-SA 2.0, Wikimedia Commons
Two-spotted spider miteFine silk webbing over leaves and shoot tips in heavy attacks.Also called: red spider mitePhoto: Gilles San Martin from Namur, Belgium, CC BY-SA 2.0, Wikimedia Commons
WhiteflySticky honeydew on leaves, stems and fruit, followed by black sooty mould.Photo: gaucho, CC BY-SA 3.0, Wikimedia Commons

Diseases

Which green beans problems need quick action?

These spread or do lasting harm fast; check the plants and start treatment the day you see them.

Fusarium wilt: White, pink or orange fungal growth may appear on dead stems in wet weather; the whole plant usually dies.
Grey mould: Small black seed-like bodies may form on the infected material.
White mould (Sclerotinia): Roots, heads, pods and fruit can rot too, also in storage.

Plants with many of the same problems

Which plants each problem affects: sources

The links between these problems and the plant were checked against these pages.