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(formerly known as Costelytra zealandica)
Grass Grubs are the larval stage of the native Bronze (or Brown) Beetle which chew at the roots of plants and lawns. Grass grub larvae have a cream body with a light brown head and they vary in size from 6mm to 20 mm as they grow. The tail end of the grub may look darker brown which is due to the soil the grub has ingested during feeding. The grubs feed on plant roots in large numbers and curl up when disturbed. Larvae are most active during mid spring to mid-summer, and can cause severe damage to lawns, gardens and potted plants. Grass grubs are among the most destructive pasture pests in NZ and are a real challenge for the agricultural sector.
Wilting plants despite being well watered and brown patches in lawn, which can be easily lifted up like a carpet.
Yates® Lawn Grub and Porina Kill + Protect delivers excellent preventative control against grass grub larvae. For best results, apply the granules from January to March. The long residual performance of Yates® Lawn Grub and Porina Kill + Protect provides up to 6 months protection.
Keeping your lawn strong and healthy really helps it to resist pest pressure. Give your lawn a weekly deep watering, mowing at a higher level and feeding it regularly with Yates Dynamic Lifter Organic Lawn Food.