Tree Service Bakersfield

Imagine staying outside all of the time, even during winter. Exposed to severe weather, you’d face many problems. Even though trees live and grow outside, that doesn’t mean that the challenges of winter aren’t stressful for them too! Low temperatures, heavy snow, ice storms and other extremes cause a variety of winter injuries on landscape plants. It’s important to know what type of problems to look for during winter.

Low Temperature Injuries

Root damage can happen during prolonged cold spells, especially on shallow-rooted plants, container plantings and non-native plants. When roots die during this weather, the symptoms won’t appear until late winter or spring. At that point, foliage turns brown, buds die and the entire crown may wilt and die suddenly.

Low temperatures can also kill above-ground portions of plants. Again, non-native plants are most susceptible.  

Winter Drying   

Winter drying generally affects evergreens, particularly mountain laurel, rhododendron, azalea and holly. Plants continue to transpire water during winter. When the soil is frozen, that water cannot be replaced and the foliage dries out. As with injury from low temperatures, in late winter or spring, foliage will turn brown and buds will die.

Stem Splitting or “Frost Cracks”

Frost cracks generally occur on young, thin-barked trees like maple, sycamore or linden. The sudden drop in temperature from sunny, daytime highs to the very lows of nighttime causes stem tissues to shrink and wood to crack.

In severe instances, cracks can extend well into the heartwood, but usually, it is restricted to the outer few inches of wood. Frost cracks can be an entry point for decay on certain species.

Breakage from Snow and Ice Accumulation

The added weight of ice and snow can break branches. Heavy or long limbs, branches showing signs of decay, or those with a weak branch attachment are more vulnerable. This can also be an issue for evergreens, which have a large surface area to “hold” snow.

Deicing Salt Injuries

The salt (sodium chloride) commonly used as a deicing agent can splash onto plants or seep into soil. Salt spray dries out foliage and buds. In the soil, high levels of salt dries out, and can kill, plant roots.

Damage from Animals

Some animal activity during winter is harmful to trees and shrubs. Deer are one example. As other food sources become unavailable, deer turn to twigs and buds for sustenance. Further, deer injure trees by scraping their antlers against the trunk. This is called “buck rub.”

Small rodents and rabbits can also be problematic. These animals eat bark tissue around the lower stem and root collar during winter. This can result in tree death when feeding leads to girdling, where the bark is completely stripped from the tree.

Deicing salts can kill plant roots and dry out foliage.

Small rodents and rabbits feed on bark when other food sources are sparse.

Low temperatures can damage roots or the above-ground portion of plants.

Browning foliage resulting from winter drying.

Breakage from winter weather is readily apparent once the leaves have returned.

The post Watch Out for Winter Tree & Shrub Problems first appeared on Tree Topics.

Did you miss our previous article…
https://www.treeservicebakersfield.co/?p=289

While tree diseases often thrive in spring, it is important to remember that proper care year-round can make a big difference in managing these issues. Some simple practices now can help combat disease. One good example is autumn and winter care to help control fire blight. Caused by the bacterium Erwinia amylovora, fireblight commonly infects pear, apple, hawthorn and quince.

The scorched leaves and “shepherd’s crook” that are telltale signs of fire blight.

Symptoms of Fire Blight

The disease gets the name “fire” blight because severely infected plants will have blackened or dark brown branches and foliage. Plant tissue can look as if it has been scorched or burned. The affected branches also often form a shepherd’s crook at the tip.

How Fire blight Spreads

Bees and wind-driven rain spread new infections during spring. These infections progress into the twigs and toward the main trunk. Once infected, cankers on trunks and branches can persist, where they serve as a source for future infections. Left untreated, cankers can completely girdle the cambium tissue. The result is the death of large branches or entire trees. The bacterium is active during the moist and humid weather of spring. After spring, the bacterium is normally dormant. However, symptoms in infected tissue can continue to worsen during this time.

ction to Combat Fire Blight

Management of fire blight requires sanitation and prevention. Pruning infected tissue should be performed when the bacterium is dormant and spread of disease has ceased. Please note that on highly susceptible trees and rapidly advancing infections, pruning below the branch cankers should be performed immediately to reduce severity – even when the disease is active.

Any leaves that have fallen from infected trees should be bagged and removed to help minimize re-infection.

Preventive treatments can also help protect healthy tissues from new infections. It is rare to get complete control over any plant disease but limiting infections through sanitation and prevention will limit dieback and avoid major infections that often lead to plant disfigurement or mortality. 

The post Fight Fire Blight with Pruning & Treatments first appeared on Tree Topics.