How to Kill Grasshoppers That Are Eating My Orange Trees

Grasshoppers in the insect family Acrididae are common plant pests. Most species are solitary, but a few migrating species congregate into large swarms, causing significant damage to plants in their path. The eastern lubber grasshopper (Romalea guttata) is a particular pest of citrus trees. This large insect can grow up to 3 inches long and has colorful markings, warning predators of its bad taste. In small numbers, this slow-moving insect is easy to catch and destroy, often without the need for harsh or toxic chemicals.

Insect net
Bucket of soapy water
Hard plastic container with lid
Commercial grasshopper bait (optional)
Insecticide (optional)

Instructions

- 1
  
  Remove grasshoppers from plants with an insect net.
  
  Collect grasshoppers by sweeping an insect net over them. Nets can be purchased from a scientific supplier or constructed with simple materials at minimal cost.
- 2
  Drop grasshoppers into a bucket of soapy water. The insects will quickly drown. Dispose of dead grasshoppers appropriately for your location.
- 3
  Place live insects into a sealable plastic container if you are uncomfortable with the drowning method. Place the container into a freezer for 24 hours, then dispose of the container and grasshoppers. Freezing is considered to be a more humane way to kill insects.
- 4
  Set baits according to supplier instructions. Commercial baits are typically made of chemicals, such as carbaryl, mixed with a cereal base to attract the insects. Grasshoppers feed on the mixture with fatal results. Availability of this type of product varies by state. Bait traps are recommended for larger infestations that cannot be reduced by net-and-kill methods.
- 5
  Use chemical insecticide sprays for severe grasshopper infestations. The time and method of application is dependent on the chemical used. Follow state regulations regarding use of insecticides on citrus plants.

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