Is Grasshopper Spit Poisonous? Exploring This Insect Defense

In backyards and gardens around warm weather months, you’ve likely encountered grasshoppers – those ravenous little herbivores constantly munching on leaves and vegetation. While mostly harmless, grasshoppers have an interesting defense mechanism that raises concerns – they can spit! But is this grasshopper saliva actually poisonous to humans?

The short answer is no, grasshopper spit is not poisonous in the literal sense of being a toxin or venom. However, it does contain compounds that can trigger allergic reactions, irritations, and potential infections if exposed.

In this post, we’ll explore the composition of grasshopper spit, why they produce it, how to identify exposure, treatment options, potential benefits, and tips for avoiding any risks from this insect defense mechanism. We’ll also touch on whether grasshoppers can bite humans.

What is Grasshopper Spit?

Grasshopper spit, more accurately called saliva or salivary secretion, is a liquid produced by grasshoppers to aid in feeding and defense. This saliva is generated from special salivary glands and released through the grasshopper’s mouth.

The precise composition can vary by grasshopper species but typically contains water for lubrication, as well as proteins, enzymes, amino acids, and other compounds that facilitate breaking down the grasshopper’s strict diet of tough plant matter.

Is Grasshopper Spit Toxic or Poisonous to Humans?

While colloquially called “grasshopper spit,” this insect saliva is not a true venom or poison that is toxically lethal to humans in any normal exposure scenario. However, it can potentially cause adverse health effects, particularly for individuals with allergies or sensitivity to the proteins and compounds found in grasshopper saliva.

Potential symptoms of grasshopper spit exposure include:

  • Skin rashes, redness, itching, or irritation
  • Swelling or inflammation
  • Allergic reactions like anaphylaxis in severe cases
  • Eye irritation if making contact with eyes
  • Possible infection from bacteria or fungi if an open wound

In most cases, the effects are mild and can be treated with basic first aid measures. But those with insect allergies or compromised immune systems should exercise more caution around grasshopper spit exposure.

Why Do Grasshoppers Spit?

For grasshoppers, their salivary secretions serve several key purposes:

  1. Lubrication and Pre-Digestion: Grasshopper saliva lubricates their mandibles (jaws) and jump-starts the breakdown of tough plant cellulose before consumption.
  2. Defense Mechanism: Grasshoppers will spit streams of saliva as a way to deter or fend off potential predators or threats like humans trying to handle them.
  3. Prey Immobilization: Some grasshopper species spit a longer-range saliva stream to temporarily immobilize smaller insect prey before devouring them.

So while not venomous, this spitting behavior has evolved as an important tool for grasshoppers to acquire nutrients and protect themselves.

How to Identify Grasshopper Spit Exposure

Grasshopper saliva has a distinct thick, frothy appearance and feel. If you notice this residue on vegetation, surfaces, skin, or clothing after an encounter with grasshoppers, you may have been “spit” on.

Skin irritation, rashes, or swelling are other easily identifiable signs of accidental grasshopper spit contact. Some describe the sensation as a burning, prickling feeling.

Areas with high grasshopper density like fields, gardens, and prairies are most prone to potential spit exposure, particularly during summer months when populations peak.

Treating Grasshopper Spit Exposure

For minor, non-allergic cases of grasshopper spit exposure, basic first aid and home remedies can provide relief:

  • Wash the affected area thoroughly with soap and water
  • Apply cold compresses or anti-itch creams to reduce swelling and irritation
  • Take oral antihistamines like Benadryl for itchiness
  • Use antibacterial ointments on any open wounds or sores

However, if symptoms persist, worsen, or suggest an allergic reaction, discontinue home treatment and promptly seek professional medical care, which may include steroids, epinephrin, antibiotics, or other treatments.

Other Potential Benefits of Grasshopper Spit

While a deterrent for most humans, grasshopper saliva does have some unique properties and applications that add value:

  • Traditional folk remedies used grasshopper spit to treat conditions like warts boils, and fungal infections due to its antimicrobial effects.
  • Current scientific research is investigating grasshopper saliva’s ability to inhibit bacteria, fungal growth, viruses, and parasitic pathogens.
  • Some agricultural practices even purposefully apply grasshopper saliva to extend crop storage life and prevent spoilage.
  • When collected in mass, grasshopper saliva may have potential pharmaceutical or industrial biotech applications still being explored.

Avoiding Grasshopper Spit Risks

To minimize any chance of accidental exposure to grasshopper spit, it’s best to avoid unnecessarily handling or agitating grasshoppers when encountered.

Use proper protective equipment like gloves and long sleeves if you must handle them. Keep areas clear of vegetation piles or food sources that attract high grasshopper populations.

If you do experience a defensive spit from a grasshopper, simply back away and let the grasshopper retreat to safety before continuing your activities.

For most backyard adventurers, grasshopper spit is simply a minor occasional nuisance, not a severe hazard. But understanding this defensive mechanism, potential effects, and reasonable precautions is wise for peaceful coexistence with these ravenous little residents.


In the end, grasshopper spit or saliva is not a true toxin or venom that is lethally poisonous to humans. However, it can cause skin irritations, allergic reactions, and other negative effects in some individuals due to its composition of proteins and compounds.

This spitting behavior has evolved as a defense mechanism, as well as a way for grasshoppers to lubricate their feeding and digest tough plant matter. While generally a minor nuisance, proper treatment and precautions are still advised if exposure does occur.

Ultimately, grasshopper spit serves an important purpose for the survival of these unique insects. And its unique properties may even hold future scientific and agricultural value for humans. So while we may prefer they keep their saliva to themselves, a little understanding goes a long way in appreciating these ubiquitous backyard neighbors.


  • Faris

    I am the author and owner of, a website where I share my deep passion and extensive knowledge about the fascinating world of insects. As a dedicated entomologist and naturalist, I bring years of hands-on experience studying and observing a diverse array of species, from butterflies and deer flies to cockroaches and beyond. Through this platform, I aim to educate, inspire, and dispel common misconceptions about the vital roles insects play in ecosystems. In addition to curating informative and engaging content for the website, I actively contribute to entomological research and conservation efforts, driven by my lifelong fascination with the remarkable insects that inhabit our world.

    View all posts

Leave a Comment