Corn Speedwell Weed: Identification and Control Methods


Corn speedwell weed, also known as Veronica arvensis, is an annual winter weed that can be found in many parts of the world. It is a small plant that can grow up to six inches tall and has small blue or white flowers.

While it may seem harmless, corn speedwell weed can be quite problematic for farmers and gardeners alike. The weed can quickly spread and take over large areas of land, competing with crops and other plants for nutrients and resources.

Its small size and fast growth rate make it difficult to control, and it can quickly become a nuisance for those trying to maintain a healthy garden or farm.

Despite its small size, corn speedwell weed can also be quite resilient, surviving even in harsh conditions such as drought or extreme temperatures.

Corn Speedwell Weed Identification and Control Methods

Identification and characteristics of corn speedwell weed

Leaves and flowers

Picture of a blue Corn Speedwell flower

Corn speedwell weed (Veronica arvensis) is an annual herbaceous plant belonging to the family Plantaginaceae. 

The leaves are opposite, oval, and have a toothed margin. They are hairy and measure about 1 to 2 cm in length.

The flowers are small, white, and have four petals. They grow in clusters on long, slender stems that emerge from the axils of the leaves. The flowers bloom from May to September.

Seed and fruit

The seed of corn speedwell weed is small, brown, and round. It is enclosed in a capsule that splits open when mature to release the seeds. The seeds are dispersed by wind and can remain viable in the soil for up to three years.

Growth habit and life cycle

Corn speedwell weed has a prostrate growth habit and can grow up to 30 cm in length. It has a shallow root system and can grow in a variety of soil types. It prefers moist, fertile soils and can tolerate both sun and shade.

Corn speedwell weed is an annual plant that germinates in the spring and grows throughout the summer. It produces seeds in the fall and dies off in the winter.

In summary, corn speedwell weed is an annual herbaceous plant with opposite, hairy leaves and small, white flowers that bloom from May to September. The seeds are small, brown, and round and are dispersed by wind.

Corn speedwell weed has a prostrate growth habit and can grow up to 30 cm in length. It is an annual plant that germinates in the spring and dies off in the winter.

How can I remove corn speedwell from my lawn?

How can I remove corn speedwell from my lawn

Corn speedwell is a common weed that can quickly spread throughout your lawn, making it look unsightly. Fortunately, there are several ways to remove it from your lawn.

Broadleaf herbicide

One of the best ways to remove corn speedwell is to use a broadleaf herbicide. These herbicides are specifically designed to kill broadleaf weeds, such as corn speedwell, while leaving your grass unharmed.

Be sure to follow the instructions carefully and apply the herbicide when the weather is dry and calm.

Hand-pulling

Hand-pulling is another effective method of removing corn speedwell. This method is best for small areas or when the weed has just started to grow.

Use a weeding tool to dig out the entire root system, making sure to remove as much of the weed as possible.

Improving lawn health

Another way to remove corn speedwell is by improving the health of your lawn. A healthy lawn is less likely to be overrun by weeds.

Make sure to mow your lawn regularly and at the appropriate height for your grass type. Water your lawn deeply and infrequently to encourage deep root growth.

In addition, you can prevent the spread of corn speedwell by using a pre-emergent herbicide. This type of herbicide is applied before the weed has a chance to grow, preventing it from taking root in your lawn.

Is corn speedwell weed invasive?

While it is not classified as a noxious weed, it can be a nuisance for farmers and gardeners. Corn speedwell is a relatively small plant, reaching heights of only 10-30cm.

While corn speedwell is not considered to be highly invasive, it can spread quickly in areas where it is not controlled. However, corn speedwell is not considered to be a major threat to native plant species

In fact, it is often found in disturbed areas where other plants have already been removed or damaged.

It is capable of producing up to 800 seeds per plant, which can remain viable in the soil for up to five years. This means that if left unchecked, corn speedwell can quickly become a problem in agricultural fields and gardens.

Habitat and distribution

Corn speedwell weed (Veronica arvensis) is a common annual weed that is found in most parts of the world. It is native to Europe but has been introduced to other parts of the world, including North America, Australia, and New Zealand.

Corn speedwell weed is a versatile plant that can grow in a wide range of habitats, including turf, lawns, and turfgrass.

It prefers moist soils but can also grow in dry soils. It can tolerate both shade and sunlight, making it a common weed in both shady and sunny areas.

In turf and lawn settings, corn speedwell weed is a common weed that can be difficult to control. It can quickly spread and form dense mats that can choke out desirable plants.

In turfgrass, it can also compete with grass for soil moisture and nutrients, leading to thinning and weakened turf.

Corn speedwell infestation

Corn speedwell infestation

Corn speedwell (Veronica arvensis) is a common weed that is found in lawns, gardens, and agricultural fields. This weed is known to be invasive and can quickly spread, resulting in a dense growth that can choke out other plants.

In this section, we will discuss the signs and symptoms of a corn speedwell infestation, as well as the effects it can have on lawns and turf.

Signs and symptoms

Corn speedwell is a low-growing weed that can be identified by its small, oval-shaped leaves and blue or purple flowers. The leaves are arranged opposite each other on the stem and are hairy.

The flowers of corn speedwell are small and are arranged in clusters at the top of the stem. The plant can grow up to 12 inches tall.

A corn speedwell infestation can be identified by the presence of these plants on a lawn or turf. The weed can quickly spread, resulting in a thin, open turf with patches of dense growth.

The weed can also compete with other plants for nutrients and water, resulting in stunted growth and a weakened lawn.

Effects on lawn and turf

Corn speedwell can have a significant impact on the health and appearance of a lawn or turf. The weed can quickly spread, resulting in a thin, open turf that is susceptible to erosion.

The dense growth of corn speedwell can also make it difficult to mow and maintain a lawn.

In addition to its impact on the appearance of a lawn, corn speedwell can also have a negative impact on the health of other plants.

The weed can compete with other plants for nutrients and water, resulting in stunted growth and a weakened lawn. If left untreated, a corn speedwell infestation can result in the loss of a lawn or turf.

Control and management of corn speedwell weed

Cultural control methods

Corn speedwell weed can be controlled and managed through a combination of cultural and chemical control methods.

Cultural control methods involve modifying the growing conditions of the weed to make it less favorable for growth. These methods include:

  • Mowing: Regular mowing can prevent the weed from flowering and producing seeds.
  • Watering: Corn speedwell weed prefers moist soil, so reducing watering can help control its growth.
  • Fertilizing: Fertilizer application can promote the growth of desirable plants, which can compete with the weed for resources.
  • Hand pulling: Small infestations can be controlled by hand pulling the weed, making sure to remove the entire root system.

Chemical control methods

Chemical control methods involve the use of herbicides to kill or suppress the weed. Some commonly used herbicides for corn speedwell weed control include:

  • Dicamba: A selective herbicide that is effective against broadleaf weeds, including corn speedwell.
  • Triclopyr: A systemic herbicide that is effective against woody and herbaceous weeds.
  • 2,4-D: A selective herbicide that is effective against broadleaf weeds.
  • Fluroxypyr: A selective herbicide that is effective against broadleaf weeds in turfgrass and ornamental plantings.
  • MCPA: A selective herbicide that is effective against broadleaf weeds in turfgrass and ornamental plantings.

Chemical herbicides should be applied according to the label instructions, taking care to avoid overspray or drift onto non-target plants. Spot-treating with a herbicide can also be effective in controlling small infestations.

Other management practices, such as improving drainage and reducing soil compaction, can also help to prevent the growth and spread of corn speedwell weed.

Other speedwell species

Other speedwell species

There are several other species of speedwell that can be found in North America. Some of the most common include Persian Speedwell, Germander Speedwell, Creeping Speedwell, and Ivyleaf Speedwell.

Persian speedwell

Persian Speedwell (Veronica persica) is a low-growing annual weed that is native to Europe and Asia. It has small, light blue flowers and leaves that are oval-shaped with toothed edges.

Persian Speedwell is often found in lawns, gardens, and other disturbed areas.

Germander speedwell

Germander Speedwell (Veronica chamaedrys) is a perennial weed that is native to Europe and Asia.

It has small, blue-violet flowers and leaves that are toothed and slightly hairy. Germander Speedwell is often found in lawns, meadows, and other grassy areas.

Creeping speedwell

Creeping Speedwell (Veronica filiformis) is a low-growing perennial weed that is native to Europe. It has small, white or light blue flowers and leaves that are oval-shaped and slightly hairy.

Creeping Speedwell is often found in lawns, gardens, and other disturbed areas.

Ivyleaf speedwell

Ivyleaf Speedwell (Veronica hederifolia) is an annual or biennial weed that is native to Europe. It has small, light blue flowers and leaves that are ivy-shaped with toothed edges.

Ivyleaf Speedwell is often found in lawns, gardens, and other disturbed areas.

All of these speedwells are considered weeds because they can quickly spread and take over areas where they are not wanted.

They can be difficult to control because they have shallow roots and can quickly re-grow from small pieces of stem or root left in the soil.

Legal and social considerations

Corn speedwell is considered a noxious weed in many states, including North Carolina. As such, it is subject to control by law.

When dealing with corn speedwell, it is important to follow all safety guidelines and regulations regarding herbicide use.

Additionally, individuals should be aware of any potential environmental impact of using herbicides and take necessary precautions to protect nearby water sources and wildlife.

Overall, proper management of corn speedwell requires a combination of legal compliance, social responsibility, and environmental awareness.

By taking these factors into consideration, individuals can effectively control the spread of this noxious weed while promoting a safe and equitable community.

FAQ's

There are several herbicides available in the market that can effectively control corn speedwell. However, the most effective herbicide for controlling speedwell depends on the severity of the infestation and the type of grass or plant you want to protect. It is always best to consult with a professional or a local garden center for specific recommendations.

Corn speedwell is not toxic to humans or animals. However, it is not commonly consumed as it is not a food crop. It is best to avoid consuming any plant or weed unless you are certain it is safe and edible.

Scotts Weed and Feed is a broad-spectrum herbicide that can control many types of weeds, including corn speedwell.

However, its effectiveness may vary depending on the severity of the infestation and the type of grass or plant you want to protect. It is always best to read the product label and follow the instructions carefully.

Corn speedwell is not considered an invasive species in most areas. It is a common weed found in lawns, gardens, and agricultural fields. However, it can quickly spread and become a nuisance if left unchecked.

There are several herbicides available that can effectively control corn speedwell. Some of the most commonly used herbicides include 2,4-D, dicamba, and triclopyr.

It is always best to consult with a professional or a local garden center for specific recommendations based on your situation.

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