black pycnidia

Listing 1 - 10 from 24 for black pycnidia

Grape Black Rot, HYG-3004-94
... weeks after infection), minute black dots appear. These are fungal fruiting bodies (pycnidia) and contain thousands of summer spores (conidia). Pycnidia are often arranged in ... black and wrinkled (mummies). Tiny black pycnidia are also formed on the fruit mummies. The mummies usually remain attached to the cluster. Causal Organism Grape black rot is caused by the fungus, Guignardia bidwellii. Black ...
ohioline.osu.edu

Gummy Stem Blight and Black Rot of Cucurbits, HYG-3126-96
... black fungus growth. Lesions may develop anywhere on the fruit, first as water-soaked areas dotted with pycnidia that ooze yellowish masses of spores. On Hubbard-type squash, the brownish-black rot extends down into the flesh and seed cavity. Seeds often become dotted with small black pycnidia. ...
ohioline.osu.edu More from this site

Vegetable Crops pt 2
... entire foliage. Spots enlarge and turn brown, similar to lesions caused by Cercospora. Minute, black fruiting bodies can be found scattered in the affected areas. Lesions with fruiting structures ... marked by small black pycnidia. Infection by some species cause purple lesions. On pods, deep lesions are formed which may have purple margins. The center is tan with black pycnidia. Planting infected ...
plantpathology.tamu.edu

SNAPDRAGON
... , light colored spots occur on leaves and stems. Spots frequently have black or brownish dots near centers. Entire leaves may be ... from stem girdling. Spore bearing pustules appear as minute black pimples in the spots. Under a microscope, dark brown, ... black fruiting bodies of the fungus develop on the upper surface of the leaves at the center of the spots. Ash-gray spots covered with the black pycnidia ...
plantpathology.tamu.edu More from this site

FPHG -
... of dark brown surrounding the tan-to-gray center. Small, black pycnidia (pimple-like fruiting bodies of the fungus) might appear in ... year, with a few eventually reaching several feet in length. Pycnidia are produced abundantly on limb cankers. Fruit rot usually ... completely decays, dries, and shrivels into a mummy. Pycnidia that contain spores of the black rot fungus appear on the surface of the ...
ssfruit.cas.psu.edu

FPHG -
... indistinguishable from black rot canker (caused by Botryosphaeria obtusa), making isolation of the pathogen necessary for correct identification of the fungus. By spring, small, black pycnidia-- ... wounding, and winter injury favor disease development. Disease Management Same as for black rot of apple. College of Agricultural Sciences | Extension | Publications Copyright -- Alternative Media ...
ssfruit.cas.psu.edu More from this site

New Disease Reports - First report of Phomopsis viticola causing bunch rot of grapes in Australia
... pea-sized, veraison and harvest. During the growing season black lesions were observed on green shoots and leaves. At harvest, abundant black pycnidia were consistently observed on the surface of bunches with ... ºC for 14 days. Black pycnidia developed on the surface that eventually sporulated to produce yellow oozing of spores. Phomopsis viticola was re-isolated from the pycnidia that had formed on ...
www.bspp.org.uk

New Disease Reports - First report of Phomopsis asparagi causing stem blight of asparagus in Greece
... lesions that later turned dark reddish brown. The central tissue was pale in colour and pycnidia appeared on old lesions. The disease was found on leaves and any part of the ... a consequence of the disease. Fungal isolates were obtained on PDA medium from diseased tissue. Black pycnidia, 250-500 x 185-300 µm, were produced with straight, hyaline conidiophores and hyaline conidia ...
www.bspp.org.uk More from this site

Fruit Pathology - Disease Diagnostic Key
... FIRE BLIGHT (Erwinia amylovora) 18b. Black pycnidia on canker surface. Canker infection apparently initiated at large pruning cut or winter-injured site . BLACK ROT (Botryosphaeria obtusa) 18c. Infections initiated ... becomes depressed and watery exudate may appear. Later, black pycnidia may appear; at this stage the disease is indistinguishable from black rot. Outer bark of canker may slough and ...
www.caf.wvu.edu

Black Rot and White Rot of Apples
... they age, a series of concentric rings develops around the original infection point. Occasionally, small black pycnidia (asexual fungus fruiting body) can be found in the center of the lesion. Heavily infected ... of uniform width form which alternate in color from black to brown. The flesh of the rotted area remains firm and leathery. Black pycnidia are often seen on the surface of the infected ...
www.caf.wvu.edu More from this site

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