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Lily leaf beetle

Lily leaf beetle

Lilioceris lilii

A species of Lilioceris, Also known as Scarlet lily beetle

Lily leaf beetle (Lilioceris lilii) is named for its relationship with various species of lily, on which lily leaf beetle depends for food and a place to lay eggs. Because it chews holes in leaves, lily cultivators consider this species an irritating pest. If frightened, this species will stiffen and "play dead," falling to the ground in an attempt to blend in with its surroundings.

General Info About Lily leaf beetle
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Attributes of Lily leaf beetle
Colors
Black
Red
Habitat
moist area; cool area; garden; commercial lily field;
Adult Food Sources
Lily leaves, lily petals, pollen of lilies, lily seedpods, other lily plant parts
Larva Food Source
Lily leaves, lily flowers, lily stems, lily pollen, other parts of lilies
Biting/stinging
Not reported
Allergy-causing
Not reported
Pollinator
The Lily leaf beetle is often found near the corolla, where its fluffy hairs easily pick up pollen, assisting in the pollination of the plant.
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Chewing mouthparts
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Distribution Area of Lily leaf beetle
The lily leaf beetle is indigenous to parts of Europe and Asia. It is thought to have been introduced to North America through the importation of plant bulbs in 1943. First spotted in Montreal, it spread throughout Canada and appeared in Massachusetts in 1992, and by 2012 was in all six New England States, as well as New York and Washington states. In Canada it is found from the Maritime Provinces west to Manitoba. As of 2001, it spread as far west as Alberta, and as of 2017 full infestations reported as far north as the Edmonton, AB area. It has also become established as an invasive species in the United Kingdom since being first recorded in 1839, although the first colony did not become established until 1939 and it did not spread far until the 1980s, then more rapidly from the 1980s. Since then it has spread from Surrey in southern England as far north as Inverness, Scotland. It is also found in Ireland. It is also found in the Middle East and North Africa.
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Life Cycle of Lily leaf beetle
Egg The eggs of lily leaf beetle are laid on host plants. They are small and oval, often ranging in color from yellow to orange. The primary function at this stage is development into larvae, with no locomotion or feeding.
Larva After hatching, the larvae of lily leaf beetle exhibit a worm-like appearance, with a soft body often brightly colored to warn predators. This stage focuses on feeding and growth, molting several times to increase in size.
Pupal The pupa of lily leaf beetle encases itself in a protective cocoon, usually attached to a leaf or stem. During this stage, transformation into an adult occurs, with significant changes in structure and form but no feeding or movement.
Adult Emerging from the pupa, the adult lily leaf beetle displays a hard exoskeleton with distinct color patterns for camouflage or mate attraction. Equipped with wings for dispersion, the adult's primary focus is on feeding and reproduction.
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Predators of Lily leaf beetle Larvae
Birds, rodents, predaceous beetles, spiders, ants
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Scientific Classification of Lily leaf beetle
Tips for Finding Lily leaf beetle
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Youth Habitat of Lily leaf beetle
Forests and Woodlands, Urban and Suburban Areas, Agricultural and Cultivated Areas
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Habitat Preferences of Lily leaf beetle Through Different Life Stages
The eggs of lily leaf beetle are commonly found on the underside of the leaves of their host plants, primarily species of Lilies and Fritillaries. As larvae, they are typically seen clustered on the host plant leaves, consuming large amounts of foliage. During the pupal stage, lily leaf beetle can often be seen attached to the leaves or stems of the host plants or in the nearby soil. Adult lily leaf beetle prefer the foliage of these same plants, where they are frequently observed feeding and mating. To find the various stages of lily leaf beetle, scour the host plants' foliage, under leaves for eggs, and the adjacent soil for pupae.
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When is the Best Time to Observe Lily leaf beetle
The most suitable time to find adult lily leaf beetle is during daylight hours when they are most active, especially in late spring to summer.
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What is the Best Weather to Observe Lily leaf beetle
Warm and dry weather conditions are typically most suitable for finding lily leaf beetle as they are less active during cold or wet conditions.
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How and Where Can You Find Lily leaf beetle at Different Life Stages
Egg Lily leaf beetle eggs are usually laid in batches on host plants. Look for them on the undersides of leaves of plants from the Lilium genus.
Larva Lily leaf beetle larvae can often be found on the same plants as the eggs. They may be seen feeding on leaves, so inspecting host plants closely can reveal their presence.
Pupal Lily leaf beetle pupae may be located in the soil near the host plants or within leaf litter. Gently sift through the top layers of soil or debris to find them.
Adult Lily leaf beetle adults are typically found on or near their host plants. Searching foliage of Lilium species during sunny weather can yield sightings of the adults as they feed or mate.
Are Lily leaf beetle harmful?
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Are Lily leaf beetle harmful to humans?

Some colorful leaf beetles are actually toxic, and their beautiful appearance is warning predators: I am very dangerous, do not eat me! However, just observing with your eyes and touching the leaf beetle with your hand will not be poisoned.
Harmful Effects of Lily leaf beetle
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Agricultural Pests

When lily leaf beetle is present in large quantities, severe defoliation can occur, impacting the growth and aesthetic value of lilies. In massive infestations, they can deplete resources, leading to stunted plant development. Mild damage includes minor feeding marks on leaves and stems, but with large populations, they can devastate entire plants, potentially affecting commercial lily production and disrupting natural ecosystems.

More Effects of Lily leaf beetle

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