Recognising and combating pests: complete guide

Recognising and combating cannabis pests early prevents crop losses:

• Small yellow/white dots on leaves
• Fine cobwebs on the undersides of leaves
• In case of heavy infestation: bronze colouring of the leaves

• Neem oil spray (2-3x weekly)
• Increase air humidity (>60%)
• Use predatory mites as beneficial insects
• Remove infested leaves

• Silvery spots and black dots on leaves
• Small, elongated insects (1-2mm)
• Upper leaf surface becomes light/yellow

• Hang up blue boards
• Neem oil or soft soap solution
• Use predatory bugs
• Quarantine new plants

• Green, black or white small insects
• Sticky honeydew residue
• Curled, yellow leaves

• Ladybirds as natural enemies
• Soapsuds spray
• Neem oil treatment
• Cut off infested shoots

• Small black flies around pots
• Larvae in the soil (white, 5mm)
• Feeding damage to roots

• Set up yellow boards
• Allow soil to dry on the surface
• Quartz sand as mulch
• SF nematodes against larvae

• Clean grow environment
• Optimise air circulation
• Quarantine new plants
• Regular inspection with a magnifying glass
• No overwatering