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Pea-leaf weevil

Pea-leaf weevil

Sitona lineatus

A species of Broad-nosed weevils, Also known as Pea leaf weevil

Adult beetles of S. lineatus measure 3.4-5.3 mm in length. They are characterised by a series of coloured scales arranged in alternating lines (striae) on the elytra; it is from this characteristic where the species gets its name lineatus meaning 'lined' or 'striped'. The head and pronotum also have fine pointed setae amongst the scales. The antennae are clubbed, pointed and preceded by 7 segments. The femora is dark, but tibiae and tarsi are red.

General Info About Pea-leaf weevil
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Attributes of Pea-leaf weevil
Colors
Brown
Black
Gray
White
Habitat
Grass tussock; loose bark; fallen leaves
Adult Food Sources
Leaves of leguminous plants, foliage of peas, foliage of beans, clover leaves, alfalfa leaves
Larva Food Source
Root nodules of legumes, root hairs, root tissues of peas, root tissues of clovers, root tissues of beans
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The Pea-leaf weevil 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 Pea-leaf weevil feeds on plants, usually without causing significant harm. However, it's important to take the situation seriously if their numbers begin to increase significantly.
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Chewing mouthparts
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Species Status of Pea-leaf weevil
Invade North America
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Distribution Area of Pea-leaf weevil
Europe, North Africa, North America
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Life Cycle of Pea-leaf weevil
Egg At the egg stage, the pea-leaf weevil begins as a small, oval, and often whitish egg, typically deposited in or on a food source. The egg serves as a protective casing for the embryo as it develops.
Larva In the larval stage, the pea-leaf weevil emerges as a grub-like creature, usually lacking true legs and with a soft body. It is voracious, feeding actively to gather resources for growth.
Pupal As a pupa, the pea-leaf weevil is encased in a protective cocoon. It experiences a remarkable transformation where tissues and organs are rearranged and developed into adult structures.
Adult Emerging from the pupa, the adult pea-leaf weevil displays a hard exoskeleton, wings, and functional reproductive organs. It is this stage where the pea-leaf weevil is mobile and focuses on reproduction.
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Predators of Pea-leaf weevil Larvae
Birds, hedgehogs, ground beetles, rove beetles
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Predators of Adult Pea-leaf weevil
Birds, small mammals, predatory beetles, spiders
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Interesting Facts About Pea-leaf weevil
Pea-leaf weevil can eavesdrop on the chemical signals of plants, altering their own behaviors to evade predators.
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Scientific Classification of Pea-leaf weevil
Tips for Finding Pea-leaf weevil
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Youth Habitat of Pea-leaf weevil
Agricultural and Cultivated Areas, Grasslands and Prairies
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Adult Habitat of Pea-leaf weevil
Agricultural and Cultivated Areas, Grasslands and Prairies
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How Can You Attract Pea-leaf weevil
An attractant trap for pea-leaf weevil may include using host plant material or pheromones specific to pea-leaf weevil to lure them for the purpose of population monitoring or control.
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Habitat Preferences of Pea-leaf weevil Through Different Life Stages
The eggs of pea-leaf weevil are usually laid in the soil near host plants, so you might find them in fields or gardens. Larvae, after hatching, are also found in the soil, feeding on root nodules of legumes. Searching for the larvae involves careful digging near such plants. Pupae are often buried in the soil too, requiring excavation around the root zone. Adult pea-leaf weevil are found on the foliage of leguminous plants, especially during daylight hours, so looking for them involves inspecting leaves and flowers. For all stages, a focus on areas where legumes are grown is essential.
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When is the Best Time to Observe Pea-leaf weevil
The suitable time to find adult pea-leaf weevil is often during the warmer months when they are most active, typically in the morning or late afternoon when temperatures are moderate.
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What is the Best Weather to Observe Pea-leaf weevil
Dry and sunny conditions are generally more favorable for finding pea-leaf weevil as moisture may inhibit their activity and encourage them to remain hidden.
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How and Where Can You Find Pea-leaf weevil at Different Life Stages
Larva Pea-leaf weevil larvae can be found in the soil feeding on roots. To locate them, carefully dig around the base of host plants and sift through the soil.
Pupal Pea-leaf weevil pupae are typically underground. Locating them involves digging in the soil where pea-leaf weevil larvae have been found, though this stage is less often sought due to the difficulty of finding pupae without disturbing them excessively.
Adult Pea-leaf weevil adults can often be spotted on or near the foliage of host plants. Searching for them involves inspecting the plants they are known to feed on, especially looking on the underside of leaves and stems in the early morning.
Are Pea-leaf weevil harmful?
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Harmful Effects of Pea-leaf weevil
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Agricultural Pests

Pea-leaf weevil larvae can severely damage legume roots, impairing nutrient and water uptake. Adults chew leaf edges but are less harmful. High infestations can lead to significant yield losses, potentially affecting the food supply and economy.

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Hurt Plant

Pea-leaf weevil infestation can lead to mild to severe damage in leguminous plants. Adults chew leaf tissues, causing characteristic 'notches', while larvae attack the roots, impairing nutrient uptake. This can result in stunted growth, reduced vigor, and lowered yield in affected crops.

More Effects of Pea-leaf weevil

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