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Pear slug

Pear slug

Caliroa cerasi

A species of Caliroa, Also known as Pear sawfly, Pear slug sawfly, Pear and cherry slugworm

Fruit trees, including pear, are a primary food source for the pear slug. Adults appear in early to mid-summer and begin feeding on the trees. Females also insert their eggs individually into slits in the foliage. The germination period is only two weeks, allowing the infestation to continue. It is considered a pest in private and commercial orchards.

General Info About Pear slug
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Attributes of Pear slug
Colors
Brown
Habitat
fruit
Adult Food Sources
Nectar, pollen, honeydew, plant juices
Venomous
Not reported
Non-poisonous
The Pear slug 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 Pear slug 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-lapping mouthparts
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Life Cycle of Pear slug
Egg The pear slug begins life as an egg, which is usually oval and minute. The egg's color and markings may vary, but they are often inconspicuous and laid on or near future food sources.
Larva Upon hatching, the larva of pear slug resembles a small worm, with a distinct head and several pairs of false legs. It molts several times, growing larger and may change colors for camouflage or warning.
Pupal The pear slug enters a pupal stage where it's encased in a cocoon or similar structure. During this time it is immobile and undergoes significant transformation, its body restructuring into adult form.
Adult Emerging from the pupa, the adult pear slug'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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Adult Size of Pear slug
4 - 6 mm
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Predators of Pear slug Larvae
Frogs, toads, birds, jumping spiders, mantises, beetles, rodents
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Predators of Adult Pear slug
Birds, spiders, rodents, reptiles
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Interesting Facts About Pear slug
Pear slug larvae mimic the appearance of bird droppings to avoid predators, a clever example of defensive camouflage in nature.
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Scientific Classification of Pear slug
Class
Bugs
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Order
Bees
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Genus
Caliroa
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Tips for Finding Pear slug
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How Can You Attract Pear slug
In the larval stage, pear slug feeds on leaves, so traps or visual searches using leaves from their host plants would be effective.
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Habitat Preferences of Pear slug Through Different Life Stages
The eggs of pear slug are commonly laid inside the leaves of cherry and pear trees, creating slight bulges on the foliage. Larvae, when hatched, remain on the underside of these leaves, consuming the plant tissue and are often mistaken for slugs due to their appearance. To find the pupae, one must look in the soil or leaf litter beneath the host trees, as the larvae drop to the ground to pupate. Adults are generally found on or near the host plants, as they return to lay eggs there. Searching for the different stages involves careful inspection of leaves for eggs or larvae and sifting through the soil or leaf litter for pupae.
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When is the Best Time to Observe Pear slug
The most suitable time to find pear slug is during its active periods, typically in the warmer months of late spring to early summer when larvae are most active and feeding.
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What is the Best Weather to Observe Pear slug
Warm, dry weather would be most suitable for finding pear slug since wet conditions can deter activity or make them more difficult to detect.
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How and Where Can You Find Pear slug at Different Life Stages
Egg Pear slug eggs are laid on the underside of leaves. To find them, inspect the underside of leaves on known host plants for small, oval-shaped eggs.
Larva Pear slug larvae resemble small caterpillars and can be found on the leaves they feed on. Look for signs of leaf damage on host plants and inspect both the upper and lower sides of leaves.
Pupal Pear slug pupate in the soil or in leaf litter near their host plants. Searching through the top layer of soil or decomposing leaves near host plants can reveal their pupae.
Adult Adult pear slug are active flyers and are attracted to their host plants. Spotting them involves checking flowers or leaves of the host plants during warm, sunny weather when they are most likely to be mating or laying eggs.
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Harmful Effects of Pear slug
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Forestry Pest

The larval stage of pear slug inflicts harm by chewing on plant tissues, typically leaves, without preference for tree species—posing a threat to various forestry plants. Damage manifests as skeletonized leaves and can progress from mild to severe. Heavy infestations may lead to defoliation, weakening trees and impacting timber production, potentially affecting human economic interests.

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Agricultural Pests

Larvae of pear slug are indiscriminate feeders, chewing on leaves of various crops. Minor presence only causes cosmetic damage but at high populations, they can defoliate plants, impeding photosynthesis and reducing yields. Persistent attacks can weaken plants, leaving them vulnerable to secondary infestations and diseases, potentially impacting human food supplies and market values.

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