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Dibotryon morbosum or Apiosporina morbosa is a plant pathogen, which is the causal agent of black knot. [1] [2] It affects members of the Prunus genus such as; cherry, plum, apricot, and chokecherry trees in North America. The disease produces rough, black growths that encircle and kill the infested parts, and provide habitat for insects.
The black locust is among the preferred reproductive hosts of the polyphagous shot-hole borer (PSHB, Euwallacea fornicatus). The PSHB will tunnel galleries into the trees, where it cultivates a fusarium fungus as a food source. The tree's vascular systems are disrupted; causing dieback. [22]
The fungus infects new growth of juniper trees or shrubs, i.e. the seedlings or young shoots of mature trees. Infection begins with the germination of asexual conidia, borne from pycnidia, on susceptible tissue, the mycelia gradually move inwards down the branch, and into the main stem. Management strategies mainly include removing and ...
Exidia nigricans is a species of fungus in the family Auriculariaceae.In the UK, it has the recommended English name of warlock's butter. [1] It produces black, gelatinous basidiocarps (fruit bodies) and is a common, wood-rotting species throughout the Northern Hemisphere, typically growing on dead attached branches of broadleaf trees.
Using formulations of neem oil, which is an organic broad spectrum pesticide, insecticide, fungicide and miticide controls mites and insects such as whitefly, aphid, scale, and mealy bugs, and additional fungus diseases like black spot, rust, mildew, and scab. Neem oil can be used on house plants, flowers, vegetables, trees, shrubs and fruit ...
Phellinus robiniae, commonly called the cracked cap polypore or Phellinus rimosus, [2] is a fungus of the family of Hymenochaetaceae.The fungus primarily infests black locusts, aided by openings caused by Megacyllene robiniae infestation, but also grows on various other trees such as Carya, oak, and Acacia.
Tar spot does not usually have an adverse effect on the trees' long-term health. [1] R. acerinum is an Ascomycete fungus that locally infects the leaves of trees and is a biotrophic parasite. [2] The disease is cosmetic and is therefore usually controlled only with sanitation methods. [3]
Often this fungus is found with a multitude of separate "digits", but at times the individual parts will be fused together. In maturity, the fruiting bodies can be 3–10 centimetres (1 + 1 ⁄ 4 –4 inches) tall, externally colored black or brown, [3] sometimes with shades of blue or green. It is white on the inside, with a blackened dotted ...