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.

Pest and Disease Control

51 products

Slug Control Nematodes 40sq.m.

1 packet, covers 40sq.m

NemaKnights™ Nematodes Biological Slug Control

280g bottle

Slug Control Nematodes 100sq.m

1 packet, covers 100sq.m

SlugLess Slug & Snail Deterrent 20ltr

20ltr bag

Grazers Slugs & Snails Deterrent Spray

750ml

Greenhouse Fumigator

3.5g tin

Grazers Red Lily Beetle Spray

750ml

NemaKnights™ Nematodes All Purpose Biological Chafer Grub and Vine Weevil Control

280g bottle

Grazers Slug & Snails Spray 750ml and Concentrate 350ml x2

750ml Spray, 350ml Concentrate

Grazers Slugs & Snails Deterrent Concentrate

1 x 350ml bottle

Vine Weevil Control Nematodes 12sq.m

1 packet, covers 12sq.m

Box Moth Trap & Refill Pack

1x2 Refill Pack

Sciarid Fly (Fungus Gnat) Control Nematodes 12sq.m.

1 packet, covers 12sq.m

Ant Control Nematodes 16 Nests

1 packet, covers 16 nests

Whitefly Killer Spray

750ml

Grazers Grazing Animals Deterrent Concentrate

375ml

Box Moth Caterpillar Control Nematodes 30sqm x 2 (2 sachets)

2 packets, covers 60sq.m

Bug Control Spray 1ltr and Concentrate Refill 200ml

1ltr Spray, 200ml Concentrate

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

750ml Spray, 375ml Concentrate

Box Moth Trap Refill

1 Refill

Ecofective Plant Disease Defence Spray

1 litre

Grazers Grazing Animals Deterrent Spray

750ml

Vine Weevil Control Nematodes 100sq.m

1 packet, covers 100sq.m

Grazers Red Lily Beetle Spray 750ml and Concentrate 360ml

750ml Spray, 360ml Concentrate

Nematode Easy Applicator & Garden Feeder

1 x Applicator

Ant Control Nematodes 50 Nests

1 packet, covers 50 nests

Ecofective Plant Disease Defence Spray and Concentrate Refill

1x spray and 1x refill

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

2 packets, covers 50sq.m

Carrot Root Fly Control Nematodes 60sq.m

1 packet, covers 60sq.m

Codling Moth Control Nematodes 60sq.m

1 packet, covers 60sq.m

Chafer Grub Control Nematodes 100sq.m.

1 packet, covers 100sq.m

Ecofective Plant Disease Defence Concentrate Refill

200ml Refill

Bug Control Spray

1ltr

Grazers Cabbage Caterpillars & Aphids Deterrent Spray

750ml

Wire Worm Control Nematodes 60sq.m

1 packet, covers 60sq.m

Cut Worm Control Nematodes 60sq.m

1 packet, covers 60sq.m

Pump Up Compression Sprayer 5ltr

5ltr

Guard 'n' Aid Thrips Killer

250ml

Grazers Red Lily Beetle Concentrate

350ml

Sold Out

Bug & Mildew Control Spray

1ltr

1 2

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.