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