The Morton Arb

Articles tagged Black Knot

• Black Knot of Ornamental Cherry and Plum

  | Category: Insects & Diseases | Tags: Black Knot, Ornamental Cherry and Plum
  Black knot is a serious disease of plum and cherry trees (Prunus species) throughout the United States. Black knot is a disease that gets progressively worse each year unless controlled, and it will eventually stunt or kill the tree. It is...

• Plant Health Care report May 4, 2012

  | Category: Plant Health Care Reports | Tags: juniper scale, Alder leafminer, Arborvitae leafminer, ash-lilac borer, Black Knot, brown rot of stone fruit, elm leaf miner, four-lined plant bug, galls, honeylocust plant bug, Rose rosette, Spittle bug
    May 4, 2012                 issue 2012. 3_________________________________________________________________ Our report includes up-to-date disease and insect pest reports, as well as color images, for...

• July 2, 2010

  | Category: PHC Reports Archive | Tags: Daldinia concentrica, Common persimmon (Diospyros virginiana), Black Knot, rust on mayapple, pine needle rust on goldenrod, measles on peony, Phyllosticta leaf spot, leafminers on maple, magnolia scale
  This issue includes details on many items including: Magnolia scale, leafminers on maple, Phyllosticta leaf spot, measles on peony, pine needle rust on goldenrod, rust on mayapple, and black knotWoody of the Week: Common persimmon (Diospyros...

• Plant Health Care Report, May 20, 2011 (Issue 2011.05)

  | Category: PHC Reports Archive | Tags: weather, Aphids, Apiognomonia veneta, sycamore anthracnose, Venturia inaequalis, Apple Scab, peach leaf curl, Taphrina deformans, Dibotryon morbosum, Rose, Black Knot, Chicago, Illinois, The Morton Arboretum
  May 20,...

• Plant Health Care Report May 3, 2013

  | Category: Plant Health Care Reports | Tags: crabgrass, spraying, Black Knot, cedar apple rust, cedar hawthorn rust, Cedar rusts, Cedar-quince rust, dothistroma, Elm bark beetle, galls, Hemlock rust mites, Larch casebaerer, Lichen
    This issue contains information on Elm bark beetle update Galls Larch casebearer Hemlock rust mites Cedar rust diseases Dothistroma needle blight Black knot Crabgrass control Timing spraying Lichens   To download the PDF...