How to Kill Grasshoppers in Grass

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Grasshoppers are a type of migratory insect that are capable of eating and destroying a lawn or garden. Thousands of grasshopper species live all over the world, and the best way to get rid of them is to prevent them, because adult insects are harder to kill in large numbers. Spraying them with insecticides is inadvisable because you can kill beneficial insects too, including those that prey on grasshoppers. If your area is infested with grasshoppers, consider working together with your neighbors to eliminate these pests.

Things You'll Need

  • Poultry birds
  • Praying mantises
  • Jars
  • Water
  • Molasses
  • Zinnias
  • Cilantro
  • Nosema locustae
grasshopper
grasshopper (Image: Stockbyte/Stockbyte/Getty Images)

Step 1

Use grasshoppers’ natural predators to rid your grass of adult insects. Chickens and ducks love eating grasshoppers. Buy some poultry birds if you have the space to keep them, or borrow some for a few days to significantly reduce the adult grasshopper population, preferably before fall, when the insects lay their eggs. Birds have the added benefit of leaving droppings that are a natural fertilizer.

chickens on grass
chickens on grass (Image: Jupiterimages/Photos.com/Getty Images)

Step 2

Get some live praying mantises from your local garden store. Praying mantises are voracious insect eaters that also feed on other pests like aphids and mosquitoes.

praying mantis
praying mantis (Image: Jupiterimages/Photos.com/Getty Images)

Step 3

Make some grasshopper traps by mixing nine parts water with one part molasses in jars and burying them around the lawn with the open tops sticking out of the ground. Grasshoppers will be attracted to the mixture, fall into the jars and drown.

boy with jar of mixture
boy with jar of mixture (Image: Jupiterimages/BananaStock/Getty Images)

Step 4

Lure grasshoppers elsewhere by planting zinnias in a spot away from your lawn; grasshoppers prefer zinnias to grass. You can also deter them by planting cilantro around your grass; the smell will keep the grasshoppers away.

orange zinnia
orange zinnia (Image: Medioimages/Photodisc/Photodisc/Getty Images)

Step 5

Keep your lawn lush and your garden areas full to prevent future outbreaks of grasshoppers. Grasshoppers lay their eggs in open soil, so the more soil you have covered with grass and plants, the fewer grasshoppers you will have.

lush lawn
lush lawn (Image: Jupiterimages/Comstock/Getty Images)

Step 6

Try organic grasshopper killers like nosema locustae. This is a type of spore that kills grasshoppers, but doesn’t harm people, animals or other insects. The pesticide is usually sold as cereal coated with the spore. Grasshoppers get sick and die after eating it, then infect other grasshoppers that eat the dead ones. Nosema locustae should be applied around the perimeter of the lawn in early summer when young grasshoppers are just beginning to emerge. It is less effective on adult grasshoppers.

employee at garden store
employee at garden store (Image: Comstock/Comstock/Getty Images)

Step 7

Work with your neighbors to find a solution to a grasshopper problem. Grasshoppers infest large areas and, because they migrate, you might kill off one wave only to have another wave arrive soon after. Grasshopper control is more effective if people in a larger area participate.

two grasshoppers
two grasshoppers (Image: Photos.com/Photos.com/Getty Images)

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