Tyler Brooks
Italian Arum (Arum italicum), commonly known as Italian Lords and Ladies, Orange Candle Flower, or Italian Candle Lilies, is a highly invasive species of flowering herbaceous perennial plant. It is toxic and can cause serious harm, allergic reactions, or even death to adults, children, and animals if consumed. Due to its invasive nature and toxicity, it is important to know how to control and kill Italian Candle Lilies. Here are some methods to effectively eradicate this plant and prevent its spread.
| Characteristics | Values |
|---|---|
| Common Names | Italian Arum, Italian Lords and Ladies, Orange Candle Flower, Large Cuckoo Pint |
| Scientific Name | Arum italicum |
| Height | 12-18" or 30-46 cm |
| Native Regions | British Isles, Mediterranean, Northern Africa, Western Asia, Australia, New Zealand, North America |
| Toxicity | All parts of the plant are toxic and contain toxic calcium oxalates. |
| Invasive | Yes |
| Reproduction | Seeds and tubers |
| Control Methods | Manual digging, herbicides, flame weeding, vinegar, boiling water |
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What You'll Learn
- Manual removal: Dig up the plant, including the roots and bulbs
- Chemical herbicides: Use a tank mixture of herbicides to kill the foliage
- Flame weeding: Use a flame to destroy the plant's tissue
- Vinegar: Apply horticultural vinegar to kill the plant
- Boiling water: Pour boiling water on the roots to kill the plant
Manual removal: Dig up the plant, including the roots and bulbs
Italian arum (Arum italicum), commonly known as Italian candle lilies, is an aggressive and highly invasive species of flowering herbaceous perennial plant. It is native to the British Isles, much of Europe, northern Africa, western Asia, Australia, and New Zealand, and has been introduced to various locations in North America. This plant can quickly take over a garden and is challenging to manage and eradicate.
To effectively remove Italian candle lilies through manual techniques, it is crucial to dig up and remove the entire plant, including the roots and bulbs. Leaving behind any part of the plant, no matter how small, can result in the growth of a new plant and an even worse infestation. Therefore, it is essential to be thorough and meticulous in this process.
When digging up Italian candle lilies, carefully dig around the stem, reaching down to the tuber and removing it along with any daughter tubers. Take care not to break the tubers during this process, as they can spread and start new infestations if disturbed. Place the removed tubers, along with all other plant parts, in sealed plastic bags for disposal in the garbage. Avoid composting any parts of the plant, as this can also lead to the spread of the invasive species.
Sifting through the soil can help ensure that all remnants of the plant, no matter how small, are found and removed. This meticulous approach is necessary to prevent the regrowth of Italian candle lilies. Additionally, it is important to wear heavy gloves and appropriate clothing to avoid skin contact with the plant, as it contains irritating toxins that can cause severe skin irritation and other harmful reactions.
Manual removal of Italian candle lilies through digging is most effective for small invasions. For larger infestations, other methods, such as herbicide application or flame weeding, may be more feasible, although these methods may not always affect the roots and tubers. Regardless of the method chosen, persistence and thoroughness are key to successfully eradicating Italian candle lilies and preventing their regrowth.
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Chemical herbicides: Use a tank mixture of herbicides to kill the foliage
Italian arum, also known as Italian candle lilies, is a highly invasive species of plant that is challenging to eradicate. It is classified as a toxic weed in many areas. All parts of the plant are poisonous and can cause skin irritation. Even small bulblets can sprout and grow into new plants. Therefore, it is important to carefully remove all parts of the plant from the soil to prevent an even worse infestation.
One method of controlling Italian candle lilies is through the use of chemical herbicides. When using herbicides, it is important to follow safety precautions and application instructions carefully. Always wear gloves and clothing that cover your skin to avoid direct contact with the plant and its sap. Additionally, read and follow the label instructions on the herbicide products for proper rates, treatment sites, and timing.
To kill Italian candle lilies using chemical herbicides, a tank mixture of herbicides can be applied to the foliage. A tank mixture refers to using multiple herbicide products in combination rather than just one product. This approach may be more effective in controlling Italian candle lilies due to the challenging nature of eradicating this invasive species.
When creating a tank mixture, it is important to select herbicides that are effective against broadleaf and grassy weeds, as Italian candle lilies fall into the category of broadleaf weeds. Some examples of herbicides labelled for use on broadleaf weeds in other types of lilies include Acclaim Extra (fenoxaprop), Envoy (clethodim), Vantage (sethoxydim), Fusilade II, Ornamec, and Grass-B-Gon (fluazifop). Glyphosate, the active ingredient in Roundup, is another option that can be carefully applied to problem weeds.
It is crucial to apply the tank mixture liberally to the foliage of the Italian candle lilies, ensuring complete coverage. However, be careful not to allow the herbicide mixture to drip onto the ground or nearby plants that you do not want to kill. The treatment may take up to two weeks to show results, and if any Italian candle lilies still appear healthy, they may need to be resprayed.
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Flame weeding: Use a flame to destroy the plant's tissue
Italian arum, also known as Italian candle lilies, is an invasive species that can be challenging to eradicate. It spreads by both bulb and seed and can cause skin irritation or even severe allergic reactions if consumed.
Flame weeding is an effective method for killing Italian candle lilies by destroying the plant tissue. This technique involves using a flame weeder, which can be handheld or tractor-mounted, to apply intense heat to the leaves of the plant. The heat sears the leaves, causing the cell sap to expand and damaging the cell walls. This, in turn, prevents water from moving from the roots to the leaves, causing the plant to wither and die.
When using flame weeding, it is important to time it right. It is most effective when the weeds are still young, with the first true leaves just beginning to show. For Italian candle lilies, this would typically be when the plant is one to two inches tall, although plants up to four inches tall can still be effectively flamed if done correctly.
It is also important to wear protective clothing, including gloves, pants, and closed-toe shoes, when flame weeding. Additionally, be sure to check for any fire bans in your area and have a fire extinguisher and water supply nearby. Keep in mind that multiple flame treatments may be necessary for larger plants or wet foliage.
Flame weeding can be a targeted approach, allowing you to selectively flame specific weeds while avoiding desirable plants. This method is ideal when the desirable plants are big enough to be easily distinguished from the weeds. However, non-selective flaming can also be employed when both the weeds and desired plants are similar in height, as certain hardy plants can withstand the heat without lasting damage.
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Vinegar: Apply horticultural vinegar to kill the plant
Italian arum, also known as Italian candle lilies, is a highly invasive species of plant that can be challenging to eradicate. All parts of the plant are toxic and contain toxic calcium oxalates in needle-shaped crystals. It is important to wear gloves and clothing that covers your skin to avoid skin contact with the plant, as it may cause severe skin irritation.
To kill Italian candle lilies, you can use horticultural vinegar, which has a much higher acetic acid content than household vinegar and can be found at garden centers, farm stores, or online. With its potent solution, horticultural vinegar can eliminate stubborn weeds after a few applications. Here are some detailed instructions on how to apply horticultural vinegar to kill Italian candle lilies:
First, select a sunny day with a temperature of at least 70°F (21°C) for optimal results. Avoid windy or rainy days, as the wind can carry the vinegar to other plants, and rain can dilute its effectiveness. Make sure to wear protective clothing, including long sleeves, pants, gloves, and goggles, as horticultural vinegar can burn the skin, cause eye damage, and be harmful if inhaled.
When applying the vinegar, get close to the Italian candle lilies and spray it directly on the leaves, coating them uniformly. You may need multiple applications, depending on the size and age of the plant. Wait at least two weeks before spraying again. Horticultural vinegar is a non-selective herbicide, meaning it will damage any plants it touches, so be careful not to spray nearby plants that you want to keep.
While vinegar can be effective in killing Italian candle lilies, it may not reach the underground structure of the plant, and the plant may regrow. Combining vinegar application with manual removal methods, such as digging up the bulbs and tubers, can help ensure complete eradication. Additionally, disposing of the plant parts properly is crucial—bag them up and put them in the garbage rather than your compost pile to prevent the spread of tubers and new infestations.
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Boiling water: Pour boiling water on the roots to kill the plant
Italian arum, also known as Italian candle lilies, is an attractive foliage plant from Europe that can quickly take over a garden. It is classified as a toxic weed and can be challenging to manage. Here is a detailed guide on using boiling water to kill Italian candle lilies:
Prepare the Area
Before you begin, ensure you have all the necessary protective equipment. Italian arum is toxic, and even contact with its sap can cause skin irritation. Wear heavy gloves and protective clothing to avoid direct skin contact with the plant. It is also important to do this carefully, avoiding disturbing neighbouring plants as much as possible.
Identify the Roots
Locate the roots of the Italian candle lilies. The roots, or tubers, are the underground parts of the plant from which new growth can sprout. Carefully dig around the stem to find the main tuber and any daughter tubers.
Pour Boiling Water
Once you have located the roots, pour boiling water directly onto them. The extreme heat will scald and kill the roots, preventing new growth. Ensure you use enough boiling water to thoroughly soak the roots and the surrounding soil.
Repeat as Needed
It is important to note that Italian candle lilies are resilient and persistent. You may need to repeat the process of pouring boiling water on the roots multiple times to ensure all traces of the plant are eliminated. Consistently monitor the area for any new growth and act quickly to apply boiling water again if needed.
Dispose of the Plant
After treating the roots with boiling water, carefully remove all parts of the Italian candle lilies from the soil. Place the plant material, including the roots, into a sealed bag and dispose of it in the garbage. Do not compost the plant material as it may still contain viable seeds or bulblets that could sprout and grow new plants.
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