Nectria Canker, Nectria galligena
I. Introduction: Nectria canker, caused by Nectria galligena Bres., is occasionally found on apple nursery stock shipped into the eastern United States.
Canker diseases can be controlled if diagnosed early. When leaves turn yellow prematurely, check the limbs and branches for damage or bark discoloration. These areas may be shrunken or shriveled.
canker
A patch of dead cells on a trunk or branches of a woody plant.
GardenWeb Glossary of Botanical Terms
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Canker bacteria survive and multiply primarily in naturally occurring lesions. Bacteria may also survive in crevices in the bark tissues of citrus trees. Bacterial populations appear to decline rapidly in soil.
Canker eradication. During the pruning operation, remove all cankers on small branches or limbs, making a thinning cut at least 4 inches (10 cm) beneath the edge of the cankered zone.
Brown canker causes eaten away looking spots of a light chestnut brown coloration in the centers of the canker sections with deep purplish margins around the canker affected sections.
Citrus Canker
Citrus canker, a bacterial disease, has been inadvertently been introduced into Australia, and there has been a much media coverage about it in recent months that has now mellowed from panic to cautious optimism.
Hypoxylon canker occurs on many oak species (commonly blackjack, live, post, southern red, and white) and is found in forest areas and home landscapes. The disease is usually associated with stresses caused by drought, heat, wound or chemical injury.
Canker
Dead cells on the branches or trunk of a woody plant - tree or shrub.
Chimara
A plant formed of the tissues of two different species mingled together. It generally shares the characteristics of the two parents.
Canker
A general term for disease that's characterised by patches of dead cells on the trunk or branches of a tree or woody plant. Also see Anthracnose.
Pagination for glossary terms starting with the letter "c" ...
canker. A dead, discolored, often sunken area (lesion) on a root, trunk, stem, or branch.
canopy. The leafy parts of vines or trees.
carcinogen. A substance or agent capable of causing cancer.
Canker Bacterial or fungal disease causing bark lesions
Capillary Hair-like; very slender.
Capitata Latin name for a plant with a head-like or large clustered feature.
CANKER - An area on soft or rotten woody stems or twigs that is caused by bacteria and fungi.
CANOPY - The crowns of trees forming the top layer in the woods or forest. Considered the high shade of gardens.
canker A localized lesion on a limb or trunk, usually due to disease or injury. Part of the bark or wood appears to be eaten away or is sunken.
Canker: Fusicoccom (Godronia): This disease begins on the lower parts of the canes. You'll notice small reddish spots that will enlarge into a bullseye. If left untreated, they will eventually circle and gridle the cane, causing it to die-back.
Canker
The bark shrinks and cracks, eventually encircling the branch, often killing the branch.
Remove damaged branches and shoots as soon as you see the problem. Else scrape away the bark to green wood and paint with Arborex.
Cankers and sun scorch are also an occasional problem.
A favorite Fall pastime is planting fall bulbs. These bulbs turn into the first blooms of spring, brightening up and chasing away the dull, grey winter scenery.
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Canker is a fungal disease characterized by elongated, sunken spots on the canes and stems; this may be accompanied by cracking. Eventually the spots will encircle the infected canes, killing them.
Suggested Treatment: ...
The cankers are sunken dead areas of bark with black, pinhead-sized pimples. The pimples are the reproductive structures of the fungus. Under moist conditions, masses of spores may ooze out of the pimples in long, coiled, orange, thread-like tendrils.
Stem canker shows up as spreading brown patches on otherwise green stems. Another fungus, it enters the plant through pruning scars or insect wounds. Prune away the diseased portions of canes and destroy them.
CURING CANKER:
The only means of preventing the canker worm, which destroys the young fruit, and endangers the life of the tree, when discovered, and which, in many instances, has proved to be effectual, is encircling the tree, ...
Remove cankered branches and destroy them as soon as they are noticed. Make cuts well below cankers through healthy wood. Sterilize pruning tools between cuts with rubbing alcohol or a 10% solution of household bleach.
Parsnip Canker - Use resistant varieties.
Potato Blight - Spray with Bordeaux mixture in late June then at fortnightly intervals until the potatoes are dug.
Potato Black Leg - Remove and burn.
Cut out all cankers when you are pruning and treat the branches with a wound paint.
Cantankerous Cankerworms. Apply sticky bands to control cankerworms in mid-November, focusing on your large trees, especially oaks.
If you have any cankers on large stems in your peach tree you will want to cut down through the bark till you get to the wood about 1 to 2 outside of where the canker is.
Black Rot Canker
Cankers on Trees
Cedar Apple Rust
Crown Rust of Buckthorn
Disease-Resistant Apple Varieties
Dothistroma Needle Blight
Dutch Elm Disease-Resistant Elm Cultivars
Fire Blight
Flood Stress on Trees
Fungus-Killed Flies ...
Many ornamental plants and vegetables have proven resistance to diseases such as canker, mildew, and rust.
Don't overcrowd your plants.
Removing cankers (dead, discolored, sunken, or missing bark areas) by pruning out the twig or branch as described above is preferred.
Sounds like you have a pathogen called "Cypress Canker". The conifer plants can die in a matter of weeks sometimes. Usually the ones that die are under water stress to start with (need water) , so they are weak.
Symptoms: Black, tan or red spots on leaves; premature leaf drop; black cankers on stems, with a general wilt of branch tips.
Offender: This fungal disease is sometimes called black spot or twig blight.
Too little water can stress plants, making them more susceptible to disease organisms such as canker fungi. Excessive watering results in poor overall root function and greater susceptibility to root rot diseases.
Trunk canker causes branches to die, and verticillium wilt, a soil-borne fungal disease, also causes parts of redbud trees to wilt and die. Ultimately, most elderly redbuds succumb to heart-wood rot, dying from the inside out.
Common rose diseases include cankers, crown gall, powdery mildew, rust, rose blackspot and spot anthracnose. Symptoms include discoloration on leaves and stems and deformed buds or leaves.
Fire blight of pear and apple, bacterial leaf spot and bacterial canker of peach and plum are three of the more frequently observed diseases in the home garden.
On the host plants, symptoms include leaf spot and twig dieback and sometimes twig cankers. On oaks, bleeding cankers on the bark ooze a dark red sap. "Blood" may be hard to see because it's either dried or rain has washed it off.
Symptoms young sprout tips turn brown and die; hard, black spots form on developing tubers Cause black scurf/rhizoctonia canker (soil fungus) Solution plant healthy seed tubers; rotate planting bed if crop is scurfy; ...
-- Brown, water-soaked cankers oozing a dark-colored fluid or gum may develop at the soil line of some large shrubs and trees.
An organically active soil will successfully fend off garden threats like, collar rots, silver leaf, European canker, root-infecting fungus, die back, dead arm disease, etc.
Peach trees can be attacked by aphids, birds, red spider mites, earwigs and root-knot nematodes. Diseases include botrytis, bacterial canker and peach leaf curl. However patio grown trees are less likely to suffer from these problems.
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When mulch is placed too close to plant stems, it may cause the development of diseases such as rots and cankers by keeping the stems constantly moist.
Once you've settled on varieties and sizes, choose the individual plants carefully. Confirm that the trunk and stems are straight and sturdy, with no injuries or signs of canker or disease. Look for branches uniformly positioned around the trunk.
Look-alikes: Canker scale.
Plants attacked: Various galls are found on maples and oaks. Other varieties include ash flower gall, hackberry nipple gall and many more.
Management strategies: No treatment is necessary.
As you start looking at trees, there are four key factors to consider. First, Johnson suggests checking the tree over carefully. "Make sure the tree has one straight stem with no wounds or cankers, it's well watered and free of dead wood." ...
For best results, however, fertile well-drained soil and consistent moisture is best. Choose a location with exposure to full daily sun. Trees grown in constantly wet, swampy conditions can develop cankers, weakening and damaging the tree.
Bacterial leaf spot and stem canker begins as light green spots which later turn brown or black. The leaf stalks become black and shriveled. Avoid high temperatures, high humidity, and wetting the foliage.
 See also: Plant, Water, Spring, Leaf, Branch
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