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Oriental Beetle

Oriental Beetle

Exomala orientalis

A species of Exomala, Also known as Spotted chafer

The oriental Beetle (Exomala orientalis) is the smaller, less colorful cousin of the Japanese Beetle. It is considered exotic in the US but was introduced in the early 1900s to Hawaii. Their introduction caused a great deal of destruction to sugarcane fields. Their major expansion was done through the shipment of nursery stock.

General Info About Oriental Beetle
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Attributes of Oriental Beetle
Colors
Brown
Black
Habitat
lawn soil; flower; grassland
Adult Food Sources
Leaves of apple trees, leaves of pear trees, leaves of peach trees, floral parts of crops, sap of plants
Larva Food Source
Roots of grasses, roots of corn, roots of wheat, roots of turf grasses, roots of vegetables
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The Oriental Beetle is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
The Oriental Beetle feeds on plants, usually without causing significant harm. However, it's important to take the situation seriously if their numbers begin to increase significantly.
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Species Status of Oriental Beetle
It is native to Asia. It was introduced to North America and has since spread to, and become a pest in, several mid-Atlantic states. Its invasive range extends from Maine to South Carolina and Wisconsin.
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Distribution Area of Oriental Beetle
Asia, North America
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Appearance of Oriental Beetle
It is a beetle about 8 - 10 mm long, with mottled, metallic brown- and black-colored elytra and a similarly-colored thorax and head during the adult stage. During the larval stage, the oriental Beetle can be identified by the parallel line raster pattern.
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How to Identify Oriental Beetle?

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Predators of Oriental Beetle Larvae
Birds, rodents, arachnids, insectivorous insects, centipedes
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Predators of Adult Oriental Beetle
Birds, small mammals, reptiles, spiders, insects, carnivorous plants
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Interesting Facts About Oriental Beetle
Oriental Beetle can produce light from their abdomen due to a chemical reaction, allowing them to communicate and attract mates in the darkness.
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Scientific Classification of Oriental Beetle
Class
Bugs
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Order
Beetles
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Family
Rutelidae
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Genus
Exomala
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Tips for Finding Oriental Beetle
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Adult Habitat of Oriental Beetle
Agricultural and Cultivated Areas, Forests and Woodlands, Grasslands and Prairies
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Habitat Preferences of Oriental Beetle Through Different Life Stages
The eggs of oriental Beetle are typically laid in the soil near host plants, which can be found in landscaped areas, gardens, or near grassy fields. Larvae, once hatched, remain buried as they feed on roots and organic matter, so to find them, one would search in moist soil under turf or decomposing leaves. Pupation also occurs within the soil, requiring a careful examination of the upper layer of soil to locate the pupae. Adult oriental Beetle are often spotted feeding on the foliage and flowers of various plants, particularly at dusk, which is the ideal time to observe them on or near their host plants.
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Harmful Effects of Oriental Beetle
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Agricultural Pests

When oriental Beetle larvae attack, they feed on roots causing wilting or stunted growth in plants, which can be mild with few pests or lead to plant death in severe infestations. Adults chew leaves creating aesthetic damage. A large number can significantly impact crop yields, affecting the agricultural economy and food supply.

More Effects of Oriental Beetle

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