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Cabbage stem flea beetle

Cabbage stem flea beetle

Psylliodes chrysocephalus

A species of Psylliodes

P. chrysocephala measures 3.0–4.0 mm in length. It is variably coloured, but most often a dark metallic blue. Like all flea beetles it has large hind femora which it can use to jump. These are orange-red in colour with the hind femora darkened. It is differentiated from other members of the genus through a lack of anterior angles on its pronotum, the punctures on top of the head being as coarse as those on the elytra, and its first front tarsal segment being equal in length to its third.

General Info About Cabbage stem flea beetle
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Attributes of Cabbage stem flea beetle
Colors
Brown
Black
Blue
Habitat
P. crysocephala can be found in various habitats, depending on the availability of a host plant. It is particularly associated with wild and cultivated members of the plant family Brassicaceae. It has been directly associated with Brassica napus, B. nigra (black mustard), B. oleracea (cabbages, cauliflowers), B. rapa (turnip rape), Nasturtium officinale (watercress), Raphanus sativus (radish), Sinapis alba (white mustard), S. arvensis (wild mustard), and Tropaeolum majus (common nasturtium).
Adult Food Sources
Leaves of brassica vegetables, floral parts of mustard plants, surface of cabbages, stems of cruciferous vegetables, petals and pollen of brassicaceae flowers
Larva Food Source
Cruciferous plant leaves, roots of brassicaceae plants, stems of brassica crops, florets of broccoli or cauliflower, kale leaves
Non-poisonous
Not reported
Borer
Not reported
Pollinator
The Cabbage stem flea 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 Cabbage stem flea beetle
It is native to the Western Palaearctic, including Macaronesia, Cape Verde and North Africa and has been introduced into Canada.
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Life Cycle of Cabbage stem flea beetle
Egg The egg is tiny and oval, with a translucent shell that might bear a tint relative to cabbage stem flea beetle's coloration. Its primary function is to provide a protective casing for the developing embryo.
Larva Upon hatching, the larva is worm-like, lacking wings, and primarily focused on feeding and growth. It molts several times, increasing in size and sometimes changing color with each instar.
Pupal The pupal stage is a transformation phase wherein cabbage stem flea beetle is encased in a protective cocoon. The organism appears dormant, but significant internal changes prepare it for adult life, seeing radical shifts in form.
Adult Emerging from the pupa, the adult cabbage stem flea beetle’s development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction.
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Predators of Cabbage stem flea beetle Larvae
Birds, rodents, insectivorous mammals, carnivorous and omnivorous beetles, spiders, ants, wasps
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Predators of Adult Cabbage stem flea beetle
Birds, rodents, insectivorous mammals, carnivorous and omnivorous beetles, spiders, ants, wasps, lizards
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Scientific Classification of Cabbage stem flea beetle
Tips for Finding Cabbage stem flea beetle
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Youth Habitat of Cabbage stem flea beetle
Agricultural and Cultivated Areas
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Adult Habitat of Cabbage stem flea beetle
Agricultural and Cultivated Areas, Grasslands and Prairies
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How Can You Attract Cabbage stem flea beetle
Attractants for cabbage stem flea beetle may include the leaves, stems, or flowers of plants that they typically feed on, since cabbage stem flea beetle is generally herbivorous.
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Habitat Preferences of Cabbage stem flea beetle Through Different Life Stages
The egg stage of cabbage stem flea beetle is typically found on the underside of host plant leaves where they are laid in small clusters. As larvae, cabbage stem flea beetle burrow into and devour the leaves, stem, and even the root systems of their host plants, preferring those in the Brassicaceae family, so searching in fields and gardens with these crops is key. Pupation often occurs in the soil near the host plant, hence inspecting the upper layers of soil will increase chances of locating pupae. Adults of cabbage stem flea beetle, being highly mobile, can be found on or near their host plants, feeding on the foliage. Gardens, crop fields, and areas with weed infestation where Brassicaceae plants are present are ideal places to look for these adults.
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How and Where Can You Find Cabbage stem flea beetle at Different Life Stages
Egg Eggs of cabbage stem flea beetle are often laid on host plants. To find them, inspect the undersides of leaves or in crevices within the plants they are known to feed on.
Larva Larvae of cabbage stem flea beetle are typically found on or near their food source. Search for them by looking closely at the surfaces of leaves and stems, particularly those showing signs of feeding damage.
Pupal Pupae of cabbage stem flea beetle can be found in the soil or leaf litter underneath the host plant. To find them, carefully sift through the top layer of soil or decomposing organic matter near the base of the plants.
Adult Adult cabbage stem flea beetle can be spotted on or around host plants. They can be found by visual search during the appropriate weather and time of day, resting on leaves or moving about the foliage.
Are Cabbage stem flea beetle harmful?
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Are Cabbage stem flea 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 Cabbage stem flea beetle
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Agricultural Pests

Larvae of cabbage stem flea beetle feed on the leaves and stems of various crops, causing defoliation and weakening plants. A small number can stunt growth, while severe infestations can lead to significant yield loss and expose plants to secondary infections, affecting both food supply and economic stability.

More Effects of Cabbage stem flea beetle

Beneficial Effects of Cabbage stem flea beetle
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Explore how insects help as pollinators, pest predators, and biocontrol agents. From seed dispersal to decomposition, they play vital roles in our ecosystem.
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Pollinator
Pollinator
Prefer Plant Type
Cabbage
Pollination Behavior Reason
Eat Pollen Or Nectar
Cabbage stem flea beetle is attracted to the smell of certain plants like cabbage. They feed on pollen, which leads to accidental pollination as they move between flowers, transferring the pollen. This interaction is an unassuming yet crucial part of the ecosystem's balance.
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