Transcript Floriculture Disorders

Floriculture Disorders
Beneficial Insects
Anthracnose
Aphids
Green Aphids – They can be an
assortment of colors.
Assassin bug – They can be different
colors than what you see here.
Bacterial wilt – The plant looks like it is in
a deep wilt.
Anthracnose
A fungal disease usually seen in trees. Look for a
leaf spot of a tree leaf. Usually affects oaks,
maples, and sycamores.
Bacterial Wilt
Seen on tomatoes and cucumbers. Look for the
wilting of the leaves.
Bacterial Wilt #2
Bacterial wilt #3
Bitter cress Weed
Bitter cress as well
Black scale ( with ant)
Black scale on a stem (grouped)
Chickweed
Chickweed too
Damping off: occurs in seedlings that are
kept too wet.
Damping off in seedlings planted in peat
moss plugs.
Dandelion - weed
Fern weed
Fusarium wilt: Found on tomato,
cucumber and herbaceous plants
Fusarium wilt: Symptoms include chlorosis,
necrosis, browning of vascular tissue (inside)
Fusarium wilt that made it to the stem.
Ganoderma butt rot: Trees (Palms)
Ganoderma Butt – base of tree (palm)
Cold Damage – Burnt tips
Cold Damage – Burnt foliage
Improper watering
Gray leaf spot of turf: Lesions are
rectangular in shape on the turf blade.
Gray leaf spot – rectangular spots
Beneficial insect – Lace wing
Beneficial insect - Ladybug
Beneficial insect – Parasitic wasp
Beneficial Insects – Praying mantid
Leaf spot
Leafhopper
Leafhopper #2
Leaf miner – after it emerges from leaf
Leaf miner damage: immature burrows through
the leaf until it emerges and flies away
Mealybugs: soft bodied scale
Mealybugs on a stem.
Mosaic: Intermingled patches of normal and
light green or yellow colors.
Mosaic: Distorted leaves
Mosaic again, notice bottom right.
Moss
Moss again
Poinsettia scab: scab like raised spots with tan
center surrounded by white, red, or purple ring.
Poinsettia scab
Powdery mildew: White powder like
fungus that covers a leaf.
Powdery mildew: covering entire leaf
Rhizoctonia: Stem rot of a plant.
Rhizoctonia: Dark lesions on the stem.
Root rot: Look for brown/black roots
Root rot: brown roots
Rust: Pustules (yellow, orange, purple) on the
undersides of leaves that produce spores.
Rust
Scale insects: piercing sucking mouthpart
Scale on stem
Scale insects
Slug
Snail
Sooty mold: black mold on leaf.
Spidermites : Come in all colors
Spidermites: Look for the webs.
Spidermites: found on underside of leaf
Spittlebug
Spittlebug again.
Whitefly: small white flies that are found
on the underside of a leaf.
Whitefly: Piercing sucking mouthpart
Wood Sorrel (clover)
Wood Sorrel