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

1 x 2m Tunnel Pro Gro Tall Net Tunnel 2m

Crop Protection

Nematode Pest Control

Slug Control Nematodes 40sq.m.

1 packet, covers 40sq.m

Sold Out

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

280g bottle

Grazers Slugs & Snails Deterrent Spray

750ml

Slug Control Nematodes 100sq.m

SlugLess Slug & Snail Deterrent 20ltr

20ltr bag

Greenhouse Fumigator

3.5g tin

NemaKnights™ Nematodes Biological Slug Control

280g bottle

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

750ml Spray, 350ml Concentrate

Grazers Red Lily Beetle Spray

750ml

Grazers Slugs & Snails Deterrent Concentrate

1 x 350ml bottle

Box Moth Trap & Refill Pack

1x2 Refill Pack

Bug & Mildew Control Spray

1ltr

Grazers Grazing Animals Deterrent Concentrate

375ml

Sold Out

Whitefly Killer Spray

750ml

Bug Control Spray 1ltr and Concentrate Refill 200ml

1ltr Spray, 200ml Concentrate

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

2 packets, covers 60sq.m

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

1 packet, covers 12sq.m

Sold Out

Ant Control Nematodes 16 Nests

1 packet, covers 16 nests

Box Moth Trap Refill

1 Refill

Ecofective Plant Disease Defence Spray

1 litre

Vine Weevil Control Nematodes 12sq.m

1 packet, covers 12sq.m

Sold Out

Ant Control Nematodes 50 Nests

1 packet, covers 50 nests

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

750ml Spray, 375ml Concentrate

Grazers Grazing Animals Deterrent Spray

750ml

Grazers Red Lily Beetle Spray 750ml and Concentrate 360ml

750ml Spray, 360ml Concentrate

Bug Control Spray

1ltr

Grazers Cabbage Caterpillars & Aphids Deterrent Spray

750ml

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

2 packets, covers 50sq.m

Chafer Grub Control Nematodes 100sq.m.

1 packet, covers 100sq.m

Pump Up Compression Sprayer 5ltr

5ltr

Guard 'n' Aid Thrips Killer

250ml

Ecofective Plant Disease Defence Concentrate Refill

200ml Refill

Ecofective Plant Disease Defence Spray and Concentrate Refill

1x spray and 1x refill

Cut Worm Control Nematodes 60sq.m

1 packet, covers 60sq.m

Carrot Root Fly Control Nematodes 60sq.m

1 packet, covers 60sq.m

Codling Moth Control Nematodes 60sq.m

1 packet, covers 60sq.m

Nematode All Purpose Fruit and Veg Protection 60sq.m

1 packet, covers 60sq.m

Vine Weevil Control Nematodes 100sq.m

1 packet, covers 100sq.m

Grazers Butterfly & Caterpillars Spray 750ml and Concentrate 350ml

750ml Spray, 350ml Concentrate

Box Moth Trap

1 box moth trap

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.