Pest and Disease Control

Keep your garden safe from insects, birds, and more with Johnsons’ pest and disease control products. Our superb range has everything you need to protect your beloved flowers and shrubs from common garden pests and the problems they can cause – whether you’re dealing with slugs, insects, or grazing mammals.

Explore bug sprays, slug deterrents, nematode control products, and more, including wildlife-safe and environmentally-friendly options for sustainable gardening. We also carry a great selection of garden disease control products to help fight bacterial and fungal infections. Browse our complete range below.

68 products

Offer

Gardening product with 'Treatment Plus Applicator' text, showing a package of nematodes and a hose.

Fungus Gnat Nematodes & Sprayer Pack

Code:

£23.90

£20.99

Offer

Gardening naturally ant nematodes treatment with a spray applicator on a grassy background

Ant Nematodes & Sprayer Pack

Code:

£32.90

£28.99

Offer

Garden treatment product with a hose and packaging on grass

Vine Weevil Nematodes & Sprayer Pack

Code:

£40.90

£34.00

Offer

Gardening naturally product with a hand holding a spray gun against a green background

Leatherjacket Nematodes & Sprayer Pack

Code:

£29.90

£26.99

Offer

Gardening naturally product packaging with a hand holding a spray nozzle against a green background.

Chafer Grub Nematodes & Sprayer Pack

Code:

£40.90

£34.95

Offer

Gardening Naturally product packaging with a hand holding a spray nozzle outdoors.

Box Moth Nematodes & Sprayer Pack

Code:

£27.90

£25.25

Offer

Two bottles of Nature's Formula slug control on a white background

Slug & Vine Weevil Nemaknights Pest Control Pack

Code:

£46.90

£41.49

Greenhouse Fumigator

3.5g tin Code: 51275

£10.95

Guard 'n' Aid Spider Mite Killer

250ml Code: 57920

£25.95

Grazers Red Lily Beetle Spray 750ml and Concentrate 360ml

750ml Spray, 360ml Concentrate Code: 58098

£22.90

Grazers Rabbits, Pigeons & Deer Spray 750ml and Concentrate 375ml x2

750ml Spray, 375ml Concentrate Code: 58099

£22.90

Bug Control Spray

1ltr Code: 53797

£9.45

Fruit Tree Grease

200g pack Code: 45710

£12.95

Bug Control Spray 1ltr and Concentrate Refill 200ml

1ltr Spray, 200ml Concentrate Code: 58106

£12.90

Box Moth Trap

1 box moth trap Code: 57921

£21.45

Bug & Mildew Control Spray 1ltr and Concentrate Refill 200ml

Code: 58107

£12.90

Chafer Grub Control Nematodes 100sq.m.

1 packet, covers 100sq.m Code: 54117

£29.95

Nematop Adult Vine Weevil Trap

1 trap, covers 10sq.m Code: 54116

£21.95

Flea and Flea Beetle Control Nematodes 25sqm x 2 (2 sachets)

2 packets, covers 50sq.m Code: 58998

£16.95

Yellow Insect Sticky Traps

Code: 57924

£9.45

Sold out

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Explore Pest Control for Gardens

From slugs, aphids, and caterpillars to mildew and leaf spots, pests and diseases can cause devastating damage to vegetables and flowering plants. Our easy-to-use pest and disease control products are designed to effectively target insects, fungi, bacteria, and more, helping you fend off unwanted visitors without harming your plants. Why not take a look at our crop protection products too?

Buy Garden Disease Control Products Online

Whether you’re tending to beds and borders, planting hanging baskets, or growing a vibrant cutting garden, you’ll find all your gardening essentials at Johnsons. From pots and planters to soil improvers, we only stock the highest quality products to help you achieve beautiful results.