Plant crop disease white mildew growing on curcurbit vegetable courgette marrow leaf leaves

Mildew on cucurbits

Time to act:

Jan, Feb, Jun, Jul, Aug, Sep, Oct, Nov, Dec

The white powdery coating on a curcubit's leaves is made up of spreading fungal spores. This affects the plant's performance, with growth, flowering and fruiting all being adversely affected. In extreme cases, the mildew can lead to dieback and even kill a plant. Since there are separate fungal species that affect different plants, an attack on your curcubits won't lead to a garden epidemic. Powdery mildew and powdery mildew on roses are similar problems, with similar solutions.

Symptoms

The first sign of mildew is a white powdery coating on the leaves that, if left, leads to a distorted, stunted plant, an inedible crop and even dieback.

Find it on

marrows, courgettes, pumpkins, squash

Advertisement

Organic

Healthy plants are less susceptible, so make sure they are well spaced and have good air circulation around them. Mulch the area to lock moisture in the ground and give plants a regular drink. The moment mildew is seen, immediately prune out and destroy the affected leaves.

Chemical

Use an all-purpose feed rather than one high in nitrogen, which will generate soft new growth that's more prone to infection.

Advertisement

Discover more ideas and inspiration

Related content

Growing prize-winning veg

Courgette rot

Container crops to sow in May

How to make pumpkin lanterns

Related offers

Offer

Save £17 on blackcurrants

Enjoy the delicious taste of fresh, home-grown blackcurrants for less. You can buy one blackcurrant 'Ben Connan' for £9.99, or save £17.98 when you buy three for just £11.99.

Order now

SAVE 20%

Subscriber only content

Save at Blooming Direct

Save 20 per cent on everything at Blooming Direct, including roses, shrubs, grow-your-own fruit and veg, bedding, bulbs, a range of accessories and more.

Unlock now

Offer

20 free* strawberry plants

Claim your collection of 20 strawberry bare-root plants (worth over £21) for free - *just pay £5.95 for postage. Please add the strawberry collection to your basket and enter our offer code to claim your discount.

Use code: GWD17STRAW

Order now