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Grasshopper in Gardens Is your garden an island in a sea of grasshoppers? Scott Schell & Alex Latchininsky Twostriped grasshopper ( Melanoplus bivittatus ) is a frequent culprit. Twostriped grasshopper facts Peak hatch May 15 to June 15 (extended hatch - 30 to 40 days)

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Grasshopper in Gardens

Is your garden an island in a sea of grasshoppers?

Scott Schell & Alex Latchininsky


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Twostriped grasshopper (Melanoplus bivittatus) is a frequent culprit.


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Twostriped grasshopper facts

  • Peak hatch May 15 to June 15 (extended hatch - 30 to 40 days)

  • Eats many types of plants, prefer forbs and legumes

  • Prolific, single egg pod holds 50 to 100 eggs

  • Adults capable of flight and short migration

  • Nymph to adult in 40 days (hot weather)


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You need to treat the nymphs

When they hatch they are the size of long grain rice


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Products Available:

  • Organic - Nosema locustae (Semaspore, Nolo bait, and other brands)

  • Single celled grasshopper disease organism is active ingredient

  • Has a short shelf life when applied to wheat bran

  • Grasshopper suppression, not control

  • Treat early and often where they hatch


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Products Available

  • Chemical – carbaryl (Sevin), malathion, some pyrethroids labeled for garden

  • Bait (various substrates) with carbaryl are effective, reduces the amount of pesticide needed by 90%

  • Twostriped grasshopper bait susceptible

  • Still treat early and often where they hatch. Light sprinkles good coverage – not piles here and there.


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Reversing the Research:

The Search for a Repellent


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Potential Grasshopper Repellents

Agent Ingredient Claim(s) Effect

Azadirachtin neem extract insects repellent

Deer Guard bitrex deer none

Garlic Barrier garlic extract insects/gh none

Hot Pepper Wax capsaicin insects none

Pinene alpha pinene insects? none

Ropel bitrex/thymol rodent/bird none


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Use of Neem as a Grasshopper Repellent

  • Insufficient data to recommend any compound as a reliable repellent of grasshoppers.

  • Only neem has demonstrated the potential for repellency in laboratory trials.

  • Biological activity found at 0.001%, which is similar to rates attained with commercially available extracts.

  • Requires repeat applications through season.


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