How to manage grasshopper damage

Grasshopper Damage Control: Effective Management Tips

Grasshoppers can wreak havoc on rangeland, field crops, and gardens, causing significant damage to vegetation. Protecting your property from these voracious insects requires effective grasshopper management techniques. By understanding their habits and implementing preventive measures, you can minimize the impact of grasshopper damage.

Key Takeaways:

  • Grasshoppers are most likely to become a threat in areas with less than 30 inches of annual rainfall.
  • The most economically important grasshopper species include the twostriped slant-face, migratory, two-striped, redlegged, differential, and Packard grasshoppers.
  • Assessing grasshopper populations using methods such as the square yard and square foot methods can help determine the extent of infestation.
  • Nymphs are the most vulnerable stage of grasshoppers and can be controlled through weather, disease, predators, and parasites.
  • Proper range management practices are vital for minimizing grasshopper damage to forage areas.

Grasshopper Management in Rangeland and Pasture

When it comes to managing grasshoppers in your rangeland and pasture, there are several effective methods you can employ to control these pests and reduce the damage they cause. Here, we will explore natural and organic approaches for grasshopper pest management.

To start, it’s important to assess the grasshopper population in your area. You can use methods such as the square yard method and the square foot method to determine the severity of the infestation. By understanding the scale of the problem, you can better plan your management strategies.

Grasshoppers compete with cattle for forage, consuming up to 50% of their body weight daily. To minimize the impact on your livestock’s nutritional intake, it’s crucial to take action when grasshopper populations exceed 12 per square yard. The best time for grasshopper control is during their nymph stage, which typically occurs from mid-May to about July 1.

There are several effective techniques to reduce grasshopper numbers. Spot treatments in hatching areas or using border sprays can specifically target high-infestation zones. Another option is RAAT (restricted area aerial treatment) with diflubenzuron—an environmentally friendly insecticide. This method allows for precise application and minimizes the impact on non-target organisms in the ecosystem.

For improved pastures or when hay is harvested as a cash crop, broadcast applications of insecticide can be justified. However, always exercise caution and consider the potential environmental consequences.

When implementing grasshopper pest management techniques, it’s crucial to strike a balance between effective control and environmental responsibility. By using natural and organic methods, you can reduce grasshopper damage while minimizing the impact on the surrounding ecosystem.

Grasshopper Damage Assessment and Management in Alfalfa

Grasshoppers can cause significant damage to alfalfa crops, primarily through defoliation. During high infestations, they may also feed on stems and crowns, further impacting the plant’s growth and productivity. It is crucial to implement effective strategies for controlling grasshopper damage and preserving the health of your alfalfa fields.

When it comes to alfalfa, early-seeded winter wheat is particularly vulnerable to grasshopper damage. The plants emerge while adult grasshoppers are still actively feeding, making them easy targets. To mitigate these risks, it is essential to implement appropriate management practices and preventive measures.

controlling grasshopper damage

Assessing Grasshopper Density

To effectively manage grasshopper populations in alfalfa, it is crucial to assess their density and determine if treatment is necessary. Various scouting and sampling methods can help you monitor grasshopper levels in your fields.

  • Sweep Net Sampling: This method involves using a sweep net to collect grasshoppers from various areas of the field. By counting the number of grasshoppers captured in a set number of sweeps, you can estimate their population density.
  • Square-Foot Method: The square-foot method involves visually inspecting a specific area of the field and counting the number of grasshoppers present. This method provides a more localized estimation of grasshopper density around your alfalfa crop.

Effective Strategies for Grasshopper Management

Once you have assessed grasshopper density and determined that treatment is necessary, it’s time to implement effective strategies for controlling grasshopper damage in your alfalfa fields.

  • Early Seeding: Consider early seeding your alfalfa crop to avoid the peak grasshopper activity period. This can help reduce the risk of damage during critical growth stages.
  • Crop Rotation: Rotate your crops to disrupt grasshopper life cycles. By introducing non-host crops, you can reduce grasshopper populations and minimize potential damage to your alfalfa.
  • Tillage: Incorporate tillage practices to disrupt grasshopper egg laying and expose them to environmental factors that can reduce their survival rates.
  • Trap Strips: Establish trap strips composed of attractive plants adjacent to your alfalfa fields. These strips can lure grasshoppers away from your crop, reducing the potential damage they can cause.

Implementing these strategies and monitoring grasshopper populations regularly will help you effectively manage and minimize the damage caused by these pests in your alfalfa fields.

Grasshopper Management and Damage in Cropland

Grasshoppers can pose a significant threat to various crops, including wheat, soybeans, corn, and alfalfa. Their feeding behavior primarily results in defoliation, as they consume and clip foliage during their feeding frenzy. Furthermore, grasshoppers may cause direct crop losses by feeding on ripening grain. Early-seeded winter wheat is particularly susceptible to grasshopper damage, making effective management crucial.

Managing grasshopper populations in cropland requires proactive measures and informed decision-making. Scouting plays a vital role in assessing grasshopper density and determining treatment thresholds. By utilizing methods such as the square-foot approach and sweep net sampling, farmers can estimate grasshopper populations in field borders or hatching areas.

Integrated pest management (IPM) practices and cultural control methods play a pivotal role in mitigating grasshopper damage in cropland. Early seeding, crop rotation, and strategic tillage can significantly reduce grasshopper populations. IPM takes a comprehensive approach, combining multiple strategies to achieve effective grasshopper control. By implementing these solutions, farmers can protect their crops and minimize the impact of grasshopper infestations on their livelihoods.


Q: How can I manage grasshopper damage?

A: To manage grasshopper damage, there are several effective techniques you can use. These include monitoring grasshopper populations, using natural control methods, reducing grasshopper damage in rangeland and pasture, and implementing strategies for controlling grasshopper damage in cropland.

Q: What are some natural methods for grasshopper control?

A: There are several natural methods you can try to control grasshopper populations. These include introducing grasshopper predators, such as birds and beneficial insects, using plants that repel grasshoppers, creating barriers to prevent grasshoppers from entering your garden or field, and practicing good weed control to eliminate grasshopper habitat.

Q: Are there any effective strategies for grasshopper management?

A: Yes, there are several effective strategies you can use for grasshopper management. These include early seeding of crops, crop rotation, tillage, and trap strips. Early seeding helps avoid vulnerable stages of crops coinciding with active grasshopper feeding. Crop rotation helps disrupt grasshopper life cycles, while tillage can disturb grasshopper eggs and reduce their population. Trap strips attract and trap grasshoppers away from crops.

Q: How can I reduce grasshopper damage in rangeland and pasture?

A: To reduce grasshopper damage in rangeland and pasture, it is important to properly manage your range according to accepted practices. This includes assessing grasshopper populations using methods like the square yard method and the square foot method. It is usually not necessary to control grasshoppers until their populations exceed 12 per square yard. Spot treatments in hatching areas or border sprays can effectively reduce grasshopper numbers, and an environmentally friendly insecticide called diflubenzuron can be used for broadcast applications.

Q: How should I assess grasshopper density in alfalfa and determine if treatment is necessary?

A: To assess grasshopper density in alfalfa, you can use scouting and sampling methods like sweep net sampling and the square-foot method. These methods help determine the number of grasshoppers per square yard. If grasshopper populations exceed the treatment threshold, which varies depending on factors such as crop growth stage and the number of grasshoppers per square yard, treatment may be necessary. Management options for grasshopper control in alfalfa include early seeding, crop rotation, tillage, and trap strips.

Q: How can I manage grasshopper damage in cropland?

A: Managing grasshopper damage in cropland involves implementing integrated pest management practices and cultural control methods. Scouting and threshold-based decision-making can help determine the need for treatment. The square-foot method and sweep net sampling can be used to estimate grasshopper density in field borders or hatching areas. Treatment thresholds can be determined based on the number of grasshoppers per square yard. Cultural control methods like early seeding, crop rotation, and tillage can help reduce grasshopper damage in cropland.

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