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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

Grasshopper in Gardens

Is your garden an island in a sea of grasshoppers?

Scott Schell & Alex Latchininsky

twostriped grasshopper facts
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)
you need to treat the nymphs
You need to treat the nymphs

When they hatch they are the size of long grain rice

products available
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
products available6
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.
reversing the research
Reversing the Research:

The Search for a Repellent

potential grasshopper repellents
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

use of neem as a grasshopper repellent
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.