Grasshoppers & Lawn Armyworm

Grasshoppers and Lawn Armyworm are two common causes of lawn damage during summer.

There are different forms of Grasshopper, the most common being brown, around 1.5 cm long and having no or insignificant wings. You may be familiar with the snapping and buzzing sound that Grasshoppers produce as they jump.

Grasshoppers are chewing insects that can damage lawns by rapidly devouring grass leaves and stems. Grasshoppers often eat leaves from the edge inwards, can cause ragged holes or brown patches in the lawn. Grasshoppers can be particularly troublesome during periods of drought, as home gardens unwittingly provide them with both habitat and food. When there are lots of Grasshoppers, their behaviour can change and form a swarm and large numbers of Grasshoppers can cause rapid defoliation.


Baythroid Advanced Insect Killer for Lawns contains a concentrated synthetic pyrethroid that is effective against Grasshoppers. Apply over the lawn using a garden sprayer as soon as Grasshoppers are detected. Adequate coverage of the lawn is essential for effective control.

Lawn Armyworm are caterpillars of night-flying moths which lay their eggs amongst turf leaves. The caterpillars grow up to 4 cm long and range in colour from green to brown, with darker and paler stripes running along their back and sides. Adult moths are brown and attracted to lights at night. There can be multiple generations of Armyworm in a year, with caterpillars being most active during summer and autumn. In large numbers, Armyworm can advance like an army (hence their name), strip the turf foliage and cause rapidly expanding bare patches.


In addition to bare patches, if you see birds pecking at the lawn, it can be a sign that Lawn Armyworm may be present. The birds are searching for the caterpillars.

Tip: You can monitor for Lawn Armyworm by placing moistened hessian bags or towels on a small section of the lawn overnight, near damaged areas. Check underneath the next morning for hiding caterpillars.

Baythroid Advanced Insect Killer for Lawns can be applied over the lawn using a garden sprayer or watering can to control Lawn Armyworm. It’s best to apply in the late afternoon, as Lawn Armyworm usually come out to feed after sunset.

Yates Grub Kill & Protect For Lawns can also be used to control destructive Lawn Armyworm. Apply these granules over the lawn using a spreader or by hand. Yates Grub Kill & Protect For Lawns contains ‘acelepryn’ technology, as used in the professional turf industry.

Yates Grub Kill & Protect For Lawns will also control other common summer lawn pests, including Sod Webworm, Black Cutworm and Argentinian Scarab Larvae, helping to take the guess work out of which lawn pest you have.

Ant Patrol

When Ants take up residence in the lawn, their mounds make the lawn look untidy and leave areas of the lawn unusable. Ants can also create nests in garden beds, affecting plant health and biting you when you're working close by. Yates Home Pest Ant & Cockroach Destroyer Granule Bait can be sprinkled near Ant mounds in lawns and around ornamental (non-edible) gardens where Ants are active.
The professional bait technology kills the Ants you can see and also helps to eradicate the Ant nest.


Related Articles

Grasshopper Control in Your Garden

Grasshoppers and locusts occasionally cause severe damage in gardens. Here are a few practical steps gardeners can take to prevent plants being damaged.

Lawn Armyworm

Lawn Armyworm is an introduced species and is a major pest of gardens. Caterpillars - the damage-causing stage of the Lawn Armyworm lifecycle - predominantly feed on tender new growth of leaves and seedlings.

Summer lawn care tips

Whether it’s preparing your lawn for the festive season and holidays or helping it recover from backyard games and parties, here are some summer lawn care tips to help create a beautiful lush green lawn.