Check foliage and roots regularly for signs of pests (and diseases).
Problems can multiply rapidly if left unattended.
feed off plant foliage causing leaves to turn pale and then drop. Some
insects target and destroy roots (e.g. fungus gnat). They also spread
disease from one plant to another via sap transfer.
Compared to growing outdoors, a controlled indoor growing environment
provides the opportunity to filter the incoming air supply (see
Fig 5.4). This greatly assists preventing problems from pests (and
detect the presence of insects, use a magnifying glass to routinely inspect
both sides of leaves, stems, medium and roots. “Yellow sticky traps” are
also useful as a forewarning (Fig 14.1).
If you do see insects, act quickly because their numbers can multiply
rapidly. Isolate the plant if possible and begin treatment immediately.
Contact your local grow shop for advice on the latest treatment methods.
insects found in hydroponic & soil plants
Spider mites (2 spotted mite)
Tiny spiders appear on the plant as pinhead sized yellowish spots. They
feed on sap and their presence is indicated by plants generally looking
sick. They cause mottling of leaves that eventually turn brown and fall
off. The formation of tiny webs indicates the problem is well advanced.
Pear shaped body typically ~2mm long; can be any color. They suck sap
from leaves causing leaves to curl.
Appear like tiny fruit fly; ~2mm long; black with 2 wings and antennae.
Their larvae eat root hairs.
Appear as ~2mm long white flies having 4 wings. They feed off plant sap
causing plants to turn yellow and wilt. Usually found on the underside
of leaves - gently shake the plant and watch for movement.
Appear 1-3mm long with hairy wings. They feed off plant sap causing
damage to manifest as patches or streaks on the leaves.
Brown, oval and hard-bodied. They suck sap from leaves and stems.