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Saint John'S Wort Beetle

Saint John'S Wort Beetle

Chrysolina hyperici

A species of Chrysolina

Chrysolina hyperici is a species of beetles of the family Chrysomelidae.

General Info About Saint John'S Wort Beetle
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Attributes of Saint John'S Wort Beetle
Colors
Green
Red
Purple
Habitat
moist or dry area; St. John's Wort
Adult Food Sources
Hypericum perforatum (st. john's wort), other hypericum species
Venomous
Not reported
Non-poisonous
Not reported
Borer
Not reported
Pollinator
Not reported
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 Saint John'S Wort Beetle
Originally distributed in Europa and Asia, it has been introduced in other places as biological control of Hypericum perforatum.
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Life Cycle of Saint John'S Wort Beetle
Egg Newly laid eggs of saint John'S Wort Beetle are small, oval, and often yellowish or pale. They're deposited on host plants and serve solely as developmental stages, with no locomotion or feeding activity.
Larva Upon hatching, the saint John'S Wort Beetle larvae are elongated, soft-bodied, and equipped with chewing mouthparts for feeding. They typically have distinct legs, and their color and size increase through successive molts.
Pupal The saint John'S Wort Beetle pupae are immobile and undergo transformation within a protective casing. This stage features significant reorganization of tissues, leading to the adult form. It's a non-feeding, transitional stage.
Adult Emerging from the pupa, the adult saint John'S Wort Beetle flaunts a hardened exoskeleton, fully functional wings, and reproductive organs. Its vivid coloration and hardened elytra protect against predators as it focuses on reproduction.
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Predators of Saint John'S Wort Beetle Larvae
Frogs, toads, birds, jumping spiders, mantises
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Scientific Classification of Saint John'S Wort Beetle
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Adult Habitat of Saint John'S Wort Beetle
Forests and Woodlands, Grasslands and Prairies, Agricultural and Cultivated Areas
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Habitat Preferences of Saint John'S Wort Beetle Through Different Life Stages
The eggs of saint John'S Wort Beetle are typically deposited on the underside of leaves, in the habitat of their host plants. Larvae are found munching on leaf tissues, usually of the same plants on which they were hatched. As larvae develop, they often remain on the host plant but might be seen on stems or in the soil during molting. Pupation predominantly occurs in the soil near the host plant or in concealed areas on the plant itself. To seek out these stages, inspect the host plants thoroughly, gently turn over the leaves for eggs or larvae, and carefully dig around the base for pupae. Adult saint John'S Wort Beetle can usually be spotted on or around the host plant foliage, where they feed and mate, often within the same locale as their immature stages.
Are Saint John'S Wort Beetle harmful?
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Are Saint John'S Wort 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 Saint John'S Wort Beetle
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Agricultural Pests

The larvae and adults of saint John'S Wort Beetle feed on hypericum, causing defoliation and stem damage. Mild infestations might only result in minor cosmetic damage, while severe cases can lead to significant plant stress, reduced vigor, and potentially plant death. Human concerns include potential control costs and loss of beneficial hypericum properties.

More Effects of Saint John'S Wort Beetle

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