Herbaceous Plants Wilt

An adult wine weevil feeding

Verticillium wilt is caused the fungi Verticillium albo-atrum and Verticillium dahliae. These fungi live in the soil and attack plants whose roots are stressed. These fungi may attack more than three hundred woody and herbaceous plant species. Plant susceptibility or resistance may vary from one region to another since the virulence found in the different strains of Verticillium sp. is usually different as well as the genetic resistance of the plant. Cultural practices and environmental conditions can influence the infection of susceptible plants with this disease.

Barberry, boxwood, stone fruit trees such as peach and plum, Kentucky coffee tree, horse-chestnut, Ohio buckeye, magnolia, maple, peony, privet, redbud, serviceberry, smoke tree/bush, spirea, sumac, tulip tree, viburnum and many herbaceous plants such as tomato, strawberry and many weeds are examples of susceptible plants. Some examples of resistant plants include all monocots, all gymnosperms, apple, crabapple, mountain ash, beech, birches, dogwood, hackberry, hawthorn, linden, honey locust, oaks, sycamore, popular, walnut, and willow.


The plant symptoms that result when this disease attacks may be confused with other plant problem symptoms such as fusarium wilt, bacterial wilt, root rots as well as drought and damage due to excessive soil moisture. In Illinois, the disease is more severe in cool to warm weather and is not as prevalent in hot weather.

Plant leaves may curl, wilt, yellow or redden interveinally, die and defoliate. Individual branch die back may also be noticed. The disease starts in the roots and then progresses upward. As the vascular system becomes plugged due to the release tyloses or gums, the above ground symptoms begin to appear.

Internally, discoloration or streaking of the sapwood (xylem vascular tissue) occurs in most plants. The sapwood discoloration may appear as a striping of the wood when viewed on a branch with the bark peeled away. If the branch or plant is cut and the cross section examined, the discoloration may appear as a ring. The vascular discoloring often occurs with the advance of the fungus or the fungal spores through the sapwood except sometimes in the early stages of infection. Vascular discoloration varies with the host. In all ashes, internal discoloration is rare. In black locust the color is a dark reddish brown, it is a yellowish brown in cherry and smoke trees and is a light- to dark-green in maple, magnolia and sumac.

Although some plants may die quickly, more commonly it takes one or more years to die. Trees and shrubs with only a few wilted branches during a growing season may become more severely infected the following year. Some may recover and show no more symptoms in the following years or the disease may cause the plant to develop symptoms years later.

In herbaceous plants, the older and lower leaves turn yellow, wilt and wither. In young herbaceous plants, plants are stunted and die prematurely. Wilting during the day with recovery at night may be common for a while.

What do you grow...and what are your experiences

2003-02-02 18:17:34 by microscopic-love

Currently I am growing a few species of Grevillea (from large bushy varieties to the creeping kinds - about 5 species total) all are doing fine and thriving. And have full sun location.
I'm also growing Westeringia, Eriostemon and Correa.
the westeringia are doing well, establishing themselves (haven't flowered much yet), the correa were slow to take off..but are healthy and thriving now.
the eriostemon (one of the greatest plants i've ever grown) is a pineapple-y scented hardy herbaceous upright bush plant that is covered with small white flowers most of the year


2007-10-08 10:30:13 by spicefo

Anise or Aniseed, less commonly anís (stressed on the second syllable) (Pimpinella anisum), is a flowering plant in the family Apiaceae, native to the eastern Mediterranean region and southwest Asia. It is a herbaceous annual plant growing to 1m tall. The leaves at the base of the plant are simple, 2-5 cm long and shallowly lobed, while leaves higher on the stems are feathery pinnate, divided into numerous leaflets. The flowers are white, 3 mm diameter, produced in dense umbels. The fruit is an oblong dry schizocarp, 3-5 mm long.
Pimpinella species are used as food plants by the larvae of some Lepidoptera species, including the lime-speck pug and wormwood pug.

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DALY: Use care when planting around septic drainfields  — Gwinnettdailypost.com
Shallow rooted annual and perennial herbaceous plants can be planted closer to the drain fields since they do not have invasive roots. Turfgrass can be grown over the drain field and is beneficial since it helps hold the soil in place.

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