Saturday, August 8, 2020

SUBSCRIPTIONS

Moab, UT

89.3 F
Moab
More

    Iron Chlorosis: symptoms, causes, solutions

    Ask an Expert

    Popular Reads

    Arches entrance closes temporarily due to fatal car accident

    The main entrance to Arches National Park temporarily closed Saturday afternoon, June...

    Fatal crash closes Arches entrance

    Esther Nakajjigo was a respected human rights activist in Uganda.

    Eligible SNAP recipients to receive extension of maximum benefits

    “Throughout this pandemic, there are many Utah families continuing to feel additional financial burdens from loss of employment or reduced hours,”


    Many landscape trees planted in Utah are highly susceptible to iron chlorosis, which is caused by a lack of available iron in the soil and results in the yellowing of plant leaves.

    a yellow leaf due to a lack of iron
    A lack of available iron in the soil can make leaves turn yellow.

    The most common symptom of iron chlorosis is interveinal chlorosis. This is the yellowing of leaves with a network of dark green veins. In more severe cases, the entire leaf turns yellow or white, and the outer edges may scorch or turn brown. Symptoms can occur on a few leaves, an individual branch, half of the tree or the entire plant. Iron chlorosis that persists year after year may lead to the death of individual branches or the entire tree.


    Iron chlorosis often occurs in alkaline soils (pH greater than 7.0), which are common in Utah. While there is an abundance of iron found in these soils, chemical reactions caused by the high soil pH make the iron solid and unavailable to plant roots. Although iron is a macronutrient (required in small amounts), it is essential for plant health. It contributes to nitrogen fixing, plant development and chlorophyll production. Yellow leaves indicate a lack of chlorophyll, which is the green pigment found in plant leaves. Without it, plants struggle to properly photosynthesize. If plants are unable to properly photosynthesize during the growing season, plant growth and vigor will suffer.


    The best way to avoid iron chlorosis is to plant species that are tolerant of alkaline soils and less susceptible to the lack of available iron. Avoid planting species that are highly susceptible to iron deficiency, since recurring chlorosis will weaken the plants. Maples, a commonly planted landscape tree in Utah, have many varieties that are highly susceptible to iron deficiencies and will quickly develop symptoms of iron chlorosis. Even species that are tolerant of moderately high pH soils may exhibit symptoms of iron chlorosis on particularly bad sites. It is always wise to get soil tested prior to planting. This will help to avoid potential problems in the future.


    Species to avoid include most maples, quaking aspen, river birch and pin oak. Some species less susceptible to iron chlorosis include Ginkgo, most oaks, Kentucky coffeetree and catalpa.
    Treatment options are available for mature trees that are suffering from iron chlorosis. Soil applications, foliar sprays and trunk injections are available. Soil and trunk treatments will last longer than foliar treatments, though foliar treatments provide a more rapid response. Some methods will work better than others, depending on the area, so you may need to try different methods until you find the right one for your situation.


    For more information, including a full list of species to plant and avoid, as well as treatment options for trees with iron chlorosis, visit http://forestry.usu.edu/trees-cities-towns/tree-care/preventing-iron-chlorosis.

    Share this!

    - Advertisement -
    - Advertisement -

    Latest News

    Trail review: Amazing vistas but be prepared!

    The views are breathtaking, but the time and teamwork to traverse the 18.9-mile trail was what made the adventure a memory of a lifetime

    Tales of Trails: Get ‘On Top of the World’ to see spectacular views

    The Top of the World Trail is about 19 miles long in and out from the pavement on Highway 128 near Dewey Bridge.

    County: No avoiding tax hike — even during a pandemic

    Were the property tax increase to be rescinded, he said Grand County “would literally be totally broke.”

    Off and running, seeking new team members

    Members of the Grand County High School cross-country team hold their first practice of the season Monday morning. Coach Randy Martin said he’s looking for more students to join the team.

    USFS proposes campground fee increases

    Members of the public are invited to comment on the proposed fee changes to the developed recreation program.