When should I treat my lawn for grubs in NZ?

When should I treat my lawn for grubs in NZ?

Many grass grub killers are recommended for application from February to late autumn, but also from spring to summer. Make sure you water the granules into the soil, and it’s even better if you are expecting moderate or heavy rainfall.

What kills grass grubs NZ?

To control adult beetles (brown beetle) spray foliage of affected trees and shrubs with Kiwicare PLANThealth Spectrum between October and January. Then apply LawnPro Smart Patch Mix, LawnPro Lawn Thickener or LawnPro Smart Lawn Seed to repair the lawn and fill in patches of dead or affected lawn.

What is the best treatment for lawn grubs?

There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. They are short-lived compounds that kill all life stages of grubs. These two insecticides are the only options if high numbers of grubs are found in the fall and in spring before early May.

When should lawns be treated for grubs?

The best time to apply grub control is between early spring and late summer when there’s increased grub worm activity in your lawn. For grub preventers, apply between June and July just before they hatch while for grub killers, apply the treatment from spring when you see signs of grass damage.

Will grass grow back after grub damage?

Grub counts from six to 10 or more per square foot can damage and kill grass. Before you repair your lawn, treat any grub infestation using beneficial nematodes or pesticides allowed in your area. It is best to repair your grub-damaged lawn in the fall or early spring to restore it to its green glory.

How can you tell if your lawn has grubs?

Signs of Grubs in Lawn

  1. Grass with damaged roots will begin to thin, yellow, and die.
  2. Irregular patches of brown grass will appear in random places in your lawn.
  3. Grass will feel very spongy and will pull up very easily.
  4. Grass will be very vulnerable to drought and other stressors.

What time of year do you treat for grub worms?

Treating in late summer or early fall is ideal, as that is when the smaller, young grubs are most susceptible to nematodes. There is also usually a short window for application in early spring before the grubs get too big and pupate, but that is a narrower window and can be difficult to time properly.

Is there a spray for grubs?

Merit contains 0.5% Imidacloprid – one of the best insecticides for killing grubs. Apart from treating grub infestations, Merit broad-spectrum pesticide will also help you control other lawn pests including mole crickets, chinch bugs, aphids, billbugs, and many more.

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