ANTHRACNOSE

SYMPTOM

BLIGHT

SYMPTOM

CHLOROSIS

SYMPTOM

MOSAIC

SYMPTOM

LEAF SPOT

SYMPTOM

LEAF BLOTCH

SYMPTOM

LEAF BLISTER

SIGN

LEAF CURL

SYMPTOM

POWDERY MILDEW

SIGN

RINGSPOT

SYMPTOM

SCAB

SIGN

SCORCH

SYMPTOM

SHOT-HOLE

SYMPTOM

TARSPOT

SIGN

WILTS

SYMPTOM

NEEDLE-CAST

SYMPTOM

TARGET CANKER

SYMPTOM

DIFFUSE CANKER

SYMPTOM

CANKER BLIGHTS

SYMPTOM

CANKER-ROTS

SYMPTOM

DECAY: WHITE-ROT

SYMPTOM

DECAY: BROWN ROT

SYMPTOM

DECAY: HEART ROT

SYMPTOM

DECAY: SAP ROT

SYMPTOM

GALL: STEM GALL

SYMPTOM

GALL: CROWN GALL

SYMPTOM

BLEEDING

SYMPTOM

SHOESTRING ROOT ROT

SIGN

DAMPING-OFF

SYMPTOM

DIEBACK

SYMPTOM

FIRE-BLIGHT

SYMPTOM

FLAG

SYMTPOM

NECROSIS

SYMPTOM

ROOT-KNOT

SYMPTOM

SLIME FLUX

SYMPTOM

WETWOOD

SYMPTOM

WITCHES BROOM

SYMPTOM

• SYMPTOM
• Irregular dead areas on the leaf margin, between and across and/or along veins, often moving onto the shoots and small twigs; sometimes whole leaves are engulfed

• SYMPTOM
• A rapid killing of large areas of the crown (branches, leaves, and reproductive structures extending from the trunk or main stems)
• a sudden, severe, and extensive spotting, discoloration, wilting, or destruction of leaves, flowers, stems, or entire plants

• SYMPTOM
• Loss of green color of leaves
• the failure of chlorophyll development, caused by disease or a nutritional disturbance; fading of green plant color to light green, yellow, or white

• SYMPTOM
• Alternate patches of normal and light-green or yellow on leave
• a disease symptom characterized by nonuniform coloration, with intermingled normal, light green and yellowish patches, usually caused by a virus

• SYMPTOM
• Dead area on the leaf that is well defined from the healthy tissues
• Uniform, circular shape
• a plant disease lesion typically restricted in development in the leaf after reaching a characteristic size

• SYMPTOM
• A large irregular (not circular) necrotic area on leaf that often diffuses into the healthy tissue
• a necrotic area of tissue irregular in form

• SIGN
• Leaf spot or blotch that is swollen or raised, so that the area appears blister-like on the UPPER!! surface of the leaf
• small, rough (concave-convex) leaf spots

• SYMPTOM
• thickened and puckered areas, causing leaves to curl and severely distort
• distortion, puffing, and crinkling of a leaf resulting from unequal growth

• SIGN
• superficial growth of white to gray-white fungus material on the UPPER PART!!! of leaves and shoots
• a common name for a disease caused by a white, powdery, superficial ascomycetous fungus that is an obligate parasite

• SYMPTOM
• Circular area of chlorosis with a GREEN CENTER
• a disease symptom characterized by yellowish or necrotic rings enclosing green tissue, as in some plant diseases caused by viruses

• SIGN
• A dark, crust-like spot of a leaf or fruit
• Can be white or black
• a roughened, crustlike diseased area on the surface of a plant organ

• SYMPTOM
• Necrosis of leaf MARGINS or TIPS
• caused by bacteria or drought
• any symptom that resembles the result of flame or fire on the affected part, often seen at the margins of leaves

• SYMPTOM
• loss of dead areas inside of leaf spots that results in a series of holes in the leaf
• margin of hole-> necrotic tissue
• a symptom in which small lesions fall out of leaves, giving the leaf the appearance of being hit by buckshot

• SIGN
• black spots that form on UPPER!! leaf surfaces.
• Their appearance closely resemble droplets of tar on leaf surfaces (Reason=bacteria change pigment in the leaf)

• SYMPTOM
• drooping of foliage from lack of water
• Diseases that affect the vascular system can cause wilt (eg DED, Oak wilt, Laurel Wilt)
• the drooping of leaves and stems from lack of water (i.e., inadequate water supply or excessive transpiration); a vascular disease that interrupts normal water uptake

• SYMPTOM
• a large drop of needles by conifers (young needles of current year are generally attacked).
• a disease symptom caused by fungi that results in premature drop of needles

• SYMPTOM
• ON STEMS, TWIGS, AND BRANCHES (not leaves)
• Localized lesions (dead areas) extending radially from the wound
• a plant disease characterized (in woody plants) by the death of cambium tissue and loss and/or malformation of bark, or (in non-woody plants) by the formation of sharply delineated, dry, necrotic, localized lesions on the stem; the term canker also may be used to refer to the lesion itself, particularly in woody plants

• SYMPTOM
• cankers which are roughly circular and contain abundant callus throughout the canker face and at the margin
• shape= concentric circles (like a target)

• SYMPTOM
• cankers that are elongated ovals and contain little callus at the margin are termed diffuse cankers
• diffuse from bottom of plant generally

• SYMPTOM
• cankers that are circular to elliptical, but contain little or no callus, and increase rapidly DURING A SINGLE SEASON
• Diffuse from top of plant to bottom of plant
• can be multi-layered from each growing season
• common in trees

• SYMPTOM
• in addition of forming a bark canker, the wood inside the tree is attacked

• SYMPTOM
• caused mostly by basidiomycetes, pathogen enters plants through wounds

• SYMPTOM
• light-colored, spongy
• a type of wood decay resulting from enzymatic action of fungi
• it degrades all components of wood, including lignin, leaving the wood light-colored and spongy (contrasts with brown rot)

• SYMPTOM
• weak and crumbly
• a wood decay resulting from selective removal of cellulose and hemicellulose, leaving a brown amorphous residue that usually cracks into cubical blocks and consists largely of slightly modified lignin (contrasts with white rot)

• SYMPTOM
• heartwood is decomposed caused by decay fungi presence in living trees

• SYMPTOM
• decay the outer bark/cambium area where phloem tissue located
• the decay fungi of dead trees

• SYMPTOM
• canker-like uncontrolled proliferation of plant cells.
• a pathogen-induced swelling of overgrowth
• caused by bacteria, nematodes, fungi, insects, viruses
• 2 types of galls on Stems: Stem galls, Crown galls
• an abnormal swelling or localized outgrowth, often roughly spherical, produced by a plant as a result of attack by a fungus, bacterium, nematode, insect, or other organism (see also knot, tumor)

• Shoestring=SIGN; Rot=SYMPTOM
• cause decay of large roots

Bleeding

• SYMPTOM
• plant sap and/or microbial materials exuding from a wound
• the sap flow from a wound

• SYMPTOM
• decay or death of seeds or seedlings at the time of germination in soil
• the death of a seedling before or shortly after emergence due to decomposition of the root and/or lower stem; it is common to distinguish between preemergence damping-off and postemergence damping-off

• SYMPTOM
• progressive death of shoots, branches or roots beginning at the TERMINALS
• usually starts in upper crown of the tips of roots
• the progressive death of shoots, leaves, or roots, beginning at the tips

• SYMPTOM
• reduced vigor or perennial plantings as a result of chronic symptoms of diseases
• the gradual reductino in health and vigor of a plant of planting that is in the process of slowly dying

• SYMPTOM
•  a destructive bacterial disease of apples and pears that kills blossoms, shoots, limbs, and sometime entire trees.
• LOOKS LIKE FIRE BURN ON SHOOT TIPS!

Flag

• SYMPTOM
• a single dying branch in a healthy crown

• SYMPTOM
• death of plants cells of plant parts
• resulting in the tissue turning brown or black because of oxidation of phenolics
• DONT CONFUSE LEAF NECROSIS WITH SPOTS, BLOTCHS, SCORCH, OR ANTHRACNOSE
• the death of cells or tissue, usually accompanied by darkening to black or brown

• SYMPTOM
• knob-like overgrowth on ROOTS or stems resulting from an imperfect vascular system
• A LOCALIZED ABNORMAL SWELLING
• a gall-like formation; on actual root as opposed to on stems/taproot (centralized)

• SYMPTOM
• fermented sap exuded through a wound in a limb or trunk
• a thick liquid from the stem of branches of trees made up of, or having a connection with yeasts, bacteria, or fungi

• SYMPTOM
• discolored, water-soaked, diseased tissue of the heartwood and older sapwood of sertain trees that bleed freely when wounded or forced out through weak areas
• trees usually located in wet areas

• SYMPTOM
• diseas
• a disease symptom characterized by an abnormal, massed, brushlike development of many weak shoots arising at or close to the same point or resulting from proliferation of buds
• Casued by mites, MLOS, viruses, fungi, false mistletoe, nematodes, rust virus