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Grasshoppers in New Jersey – Behavior & Control Tips

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What Are Grasshoppers?​

Grasshoppers are insects belonging to the suborder Caelifera within the order Orthoptera. Known for their powerful hind legs, they are capable of leaping great distances and producing distinctive “chirping” sounds. While they play a role in natural ecosystems, large numbers of grasshoppers can become destructive pests, especially in gardens and agricultural fields.

Are Grasshoppers Harmful?​​

  • Crop & Garden Damage: Grasshoppers are voracious feeders, capable of stripping leaves, stems, flowers, and crops.

  • Economic Losses: Large outbreaks can devastate agricultural areas, consuming nearly all available vegetation.

  • Nuisance Indoors: Though not common inside homes, grasshoppers may enter accidentally, causing stress due to their size and movement.

  • Allergies: In rare cases, grasshopper parts (shed skins or droppings) can contribute to allergies.

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Grasshopper Control​​

Managing grasshoppers often requires a combination of prevention and treatment.

  • Inspection: Identify grasshopper species and areas of high activity.

  • Habitat Reduction: Remove tall weeds, grass, and brush near homes and gardens.

  • Exclusion: Seal entry points around doors and windows to keep them outdoors.

  • Targeted Treatments: Professional insecticide applications may be used in severe outbreaks, especially in agricultural areas.

Types of Grasshoppers in NJ​​

  • Differential Grasshopper: Large, yellow-green species common in fields and gardens.

  • Carolina Grasshopper: Dark brown/gray species often found in open areas.

  • Red-Legged Grasshopper: Small to medium-sized, one of the most widespread species.

Grasshoppers Appearance​​

  • Size: Typically ½ inch to over 2 inches long.

  • Color: Green, brown, or gray, often with stripes or camouflage patterns.

  • Body: Elongated with large hind legs for jumping.

  • Wings: Many species have wings and can fly short distances.

Grasshoppers Habitat​​

  • Outdoors: Fields, meadows, gardens, and grassy areas.

  • Seasonal Activity: Most active in late summer and early fall.

  • Indoors: Rare, usually enter accidentally through open doors or windows.

Grasshoppers Diet​​

  • Grasshoppers are herbivores and feed on:

  • Grass and weeds

  • Leaves, stems, and flowers

  • Agricultural crops (corn, soybeans, wheat, alfalfa)

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Grasshoppers Life Cycle​​

  • Grasshoppers undergo incomplete metamorphosis:

  • Eggs: Deposited in soil in pods that overwinter.

  • Nymphs: Hatch in spring; resemble small adults without wings.

  • Adults: Fully winged and reproductive, capable of long-distance dispersal.

  • Life cycles usually last one year, with adults most visible in summer and fall.

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