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Published byWalter Greene Modified over 8 years ago
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Floriculture Disorders Beneficial Insects
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Anthracnose
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Aphids
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Green Aphids – They can be an assortment of colors.
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Assassin bug – They can be different colors than what you see here.
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Bacterial wilt – The plant looks like it is in a deep wilt.
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Anthracnose A fungal disease usually seen in trees. Look for a leaf spot of a tree leaf. Usually affects oaks, maples, and sycamores.
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Bacterial Wilt Seen on tomatoes and cucumbers. Look for the wilting of the leaves.
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Bacterial Wilt #2
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Bacterial wilt #3
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Bitter cress Weed
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Bitter cress as well
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Black scale ( with ant)
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Black scale on a stem (grouped)
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Chickweed
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Chickweed too
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Damping off: occurs in seedlings that are kept too wet.
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Damping off in seedlings planted in peat moss plugs.
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Dandelion - weed
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Fern weed
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Fusarium wilt: Found on tomato, cucumber and herbaceous plants
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Fusarium wilt: Symptoms include chlorosis, necrosis, browning of vascular tissue (inside)
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Fusarium wilt that made it to the stem.
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Ganoderma butt rot: Trees (Palms)
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Ganoderma Butt – base of tree (palm)
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Cold Damage – Burnt tips
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Cold Damage – Burnt foliage
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Improper watering
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Gray leaf spot of turf: Lesions are rectangular in shape on the turf blade.
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Gray leaf spot – rectangular spots
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Beneficial insect – Lace wing
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Beneficial insect - Ladybug
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Beneficial insect – Parasitic wasp
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Beneficial Insects – Praying mantid
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Leaf spot
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Leafhopper
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Leafhopper #2
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Leaf miner – after it emerges from leaf
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Leaf miner damage: immature burrows through the leaf until it emerges and flies away
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Mealybugs: soft bodied scale
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Mealybugs on a stem.
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Mosaic: Intermingled patches of normal and light green or yellow colors.
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Mosaic: Distorted leaves
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Mosaic again, notice bottom right.
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Moss
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Moss again
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Poinsettia scab: scab like raised spots with tan center surrounded by white, red, or purple ring.
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Poinsettia scab
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Powdery mildew: White powder like fungus that covers a leaf.
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Powdery mildew: covering entire leaf
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Rhizoctonia: Stem rot of a plant.
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Rhizoctonia: Dark lesions on the stem.
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Root rot: Look for brown/black roots
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Root rot: brown roots
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Rust: Pustules (yellow, orange, purple) on the undersides of leaves that produce spores.
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Rust
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Scale insects: piercing sucking mouthpart
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Scale on stem
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Scale insects
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Slug
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Snail
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Sooty mold: black mold on leaf.
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Spidermites : Come in all colors
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Spidermites: Look for the webs.
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Spidermites: found on underside of leaf
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Spittlebug
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Spittlebug again.
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Whitefly: small white flies that are found on the underside of a leaf.
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Whitefly: Piercing sucking mouthpart
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Wood Sorrel (clover)
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Wood Sorrel
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