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Granulate cutworm

Agrotis subterranea

A species of Agrotis

Feltia subterranea, formerly known as Agrotis subterranea, and commonly known as the granulate cutworm or tawny shoulder, is a moth of the family Noctuidae. It is found in North America, from Massachusetts and New York to California and the southern parts of the United States and Mexico. It is also present in Central America and South America where it has been reported in Honduras, Costa Rica, Cuba, Panama, Venezuela, Colombia, South-East Brazil, Uruguay, Chile, the Antilles. The wingspan is 38–44 mm. The larvae feed on a wide range of plants, including over 61 hosts of economic importance. The adults are a pollinator of fetterbush lyonia.

General Info About Granulate cutworm
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Attributes of Granulate cutworm
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
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
Siphoning mouthparts
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Life Cycle of Granulate cutworm
Egg The egg is the first stage where the granulate cutworm begins its life. These eggs are often laid in clusters and are tiny, spherical, or oval-shaped. The shell may be transparent or slightly colored, providing minimal protection to the developing embryo inside.
Larva Upon hatching, the larva or caterpillar emerges. It is elongated, with a soft, segmented body. The caterpillar granulate cutworm focuses on feeding and growth. It sheds its skin multiple times as it increases in size. Coloration varies but often includes patterns for camouflage.
Pupal After reaching a threshold size, the larva encloses itself within a cocoon or chrysalis, forming the pupa. During this stage, the granulate cutworm undergoes significant transformation. The immobile pupa may blend with the environment or be underground, protecting the developing adult inside.
Adult Emerging from the pupa, the adult granulate cutworm’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. Adult granulate cutworms usually exhibit sexual dimorphism in size and color.
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Predators of Granulate cutworm Larvae
Frogs, toads, birds, rodents, certain insectivorous arthropods such as beetles and ants
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Predators of Adult Granulate cutworm
Bats, owls, birds, small mammals, spiders
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Interesting Facts About Granulate cutworm
Caterpillars of granulate cutworm have the unique ability to produce subsonic vibrations that can deter predators, a rare behavior not commonly observed in other lepidopterans.
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Scientific Classification of Granulate cutworm
Tips for Finding Granulate cutworm
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Youth Habitat of Granulate cutworm
Grasslands and Prairies, Agricultural and Cultivated Areas
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Adult Habitat of Granulate cutworm
Grasslands and Prairies, Agricultural and Cultivated Areas, Urban and Suburban Areas
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How Can You Attract Granulate cutworm
For adult granulate cutworm, a light trap would be effective as these creatures are nocturnal and are attracted to light. For larval stages, bait traps using plant material that granulate cutworm caterpillars feed on can be used.
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Habitat Preferences of Granulate cutworm Through Different Life Stages
The larvae of granulate cutworm are typically found underground where they feed on the roots and stems of various plants, often preferring cultivated fields or gardens. Pupation occurs in the soil, transitioning into the adult moth form. Adult granulate cutworm tend to be nocturnal and are commonly found in habitats such as meadows, grasslands, and agricultural areas, where they seek out nectar sources and mates. For observation purposes, one should inspect soil around plant bases for larvae during the day and use light traps at night to attract adults.
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When is the Best Time to Observe Granulate cutworm
The best time to find adult granulate cutworm is at night since they are active after dusk. For eggs, larvae, or pupae, daytime searches would be more fruitful, especially during their active growing season which may vary depending on the local climate.
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What is the Best Weather to Observe Granulate cutworm
Calm, warm nights without moonlight are ideal for finding adult granulate cutworm. For larval stages, moist weather after rain may make them more active and visible.
Are Granulate cutworm harmful?
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Harmful Effects of Granulate cutworm
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Agricultural Pests

The larvae of granulate cutworm affect various crops by chewing on roots and stems. This can lead to stunted growth and wilted plants. In a small number, damage is often mild. However, a large infestation can result in severe damage and potentially significant crop losses, impacting food supply and farmer livelihoods.

More Effects of Granulate cutworm

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