brown centers host:plantpathology.tamu.edu

Listing 1 - 10 from 20 for brown centers

Fruit5
... purple spots which enlarge. As the spots get older, they develop purple margins with brown centers. Fruit spots are one-fourth inch in diameter, black, and slightly depressed. They sometimes ... small purple specks. At maturity the spots are purplish cast with brown centers. Twig infections are small, sunken, reddish-brown areas. The organism overwinters in cankers, decayed fruit, and dead wood. ...
plantpathology.tamu.edu

IRIS
... in size and run together. They have a grayish center with dark brown borders. The disease usually is more or less confined to the ... as 1/8 to 3/8 inch diameter, irregular spots with dark brown centers and outer edges. Remainder of spot is light tan. Good sanitation is ... soft rot of the rhizome. At first, the leaves begin to turn brown and dieback progresses until the entire plant is dead. The disease ...
plantpathology.tamu.edu

Vegetable Crops Pt1
... reddish, elongated spots. Older spots are sunken and have brown to reddish-brown borders. The disease is favored by cool, wet springs ... watery stage the affected tissues dry out and turn brown. Within a short time the brown areas are covered with a dense white fungal ... occur on leaves and stems as small spots with ashen-gray centers and black dots. The stem lesions gradually enlarge extending to ...
plantpathology.tamu.edu

Vegetable Crops pt 2
... young plants may also be attacked. Leaf blight first appears as indefinite brown to black areas with pale yellow centers. Infected leaves shrivel when infection is heavy. Under these conditions foliage appears ... Affected leaves have spots which are large, pale brown to dark brown in color. Lesions are papery in appearance and have gray to tan centers marked by small black pycnidia. Infection by some ...
plantpathology.tamu.edu

Vegetable Crops - pt 3
... growth on the underside of the leaf. Affected tissue turns brown, sometimes comprising extensive areas of the leaf. Infected leaves ... physiological): Margins of leaves die and turn brown. The first symptoms produced are small, dark brown spots about a quarter of an ... stems and bulbs. At first, small whitish, sunken lesions with purple centers are found on the leaves. These spots later enlarge and ...
plantpathology.tamu.edu

Vegetable Crops - pt 4
... are large and oval or somewhat oblong, with light gray centers. Spots may also be present on the stem. Severely ... POTATO Solanum tuberosum Early Blight (fungus - Alternaria solani): Small, angular, brown spots with concentric rings occur on lower leaves. Several ... the host plant. Lesions are circular with gray, brown or slightly off-white centers with slightly darkened margins. Severe infection can ...
plantpathology.tamu.edu

Vegetable Crops - pt 6
... pv. vesicatoria): Infected leaves show small, brown, watersoaked, circular spots about one-eighth inch in diameter. The spots may have a yellow halo; the centers dry out and frequently tear. On older ... enlarge until they are one-eighth to one-fourth inch in diameter. Centers of these lesions become irregular, light brown and slightly sunken with a rough, scabby surface. Ripe fruits are not ...
plantpathology.tamu.edu

Pecan
... with a fungicide must be maintained to prevent infections. Brown Leaf Spot (fungus - Cercospora fusca): Brown leaf spot affects only mature leaves and does not appear ... centers. This results in twig dieback. Maintain trees in a healthy condition. No control suggested at this time. Fungicides Scab Benomyl Propiconazole Triphenyltin Hydroxide Thiophanate Methyl Ziram Copper Sulfate Dodine Brown ...
plantpathology.tamu.edu

DAHLIA
... passes these may merge into larger yellow to pale green areas and the centers of the rings may turn brown. This disease is carried in roots and cuttings from diseased plants. Dahlia ...
plantpathology.tamu.edu

PHLOX
... most destructive. It attacks primarily the lower leaves, producing dark brown, circular spots up to one-fourth inch in diameter, the centers of which are light gray, almost white. Infected leaves dry ... . Both rusts appear on leaves as raised blisters or pustules covered with a brown coating that ruptures releasing the brown spores. Cotton Root Rot: See section on Cotton Root Rot. Crown Rot ...
plantpathology.tamu.edu