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Clover root weevil very obvious.

AgPest — Wed, 13 Dec 2017 19:30:37 +0000

Clover root weevil will be very obvious in most areas. While control is generally not an option careful management of clover will help maintain pasture quality. Additional nitrogen may need to be applied to pastures and clover should not be over grazed.

Clover root weevil feeding becoming obvious

AgPest — Tue, 31 Oct 2017 19:38:19 +0000

Clover root weevil feeding will become obvious in November-January – U-shaped notches at the edge of clover leaves show adults are present. The presence of larvae may be indicated by the pasture appearing nitrogen deficient. While control is generally not an option careful management of clover will help maintain pasture quality. Additional nitrogen may need to be applied to pastures and clover should not be over-grazed. In the South Island this weevil will be appearing in some areas for the first time.

Consider direct drilling to control pests

AgPest — Sat, 14 Oct 2017 19:45:59 +0000

For pastures badly affected by either grass grub or porina over winter and needing renewal, consider direct drilling. This will preserve naturally occurring diseases of these pests that are building up in the soil and which will provide long term population regulation. Leave sowing as late as possible as both pests, especially in the south, may still be feeding and could devastate establishing seedlings. Be aware that slugs and clover root weevil may also be present in damaging numbers.

Clover root weevils may reduce amount of N fixed by clover

AgPest — Mon, 02 Oct 2017 20:30:45 +0000

In established pastures with high levels of clover root weevil the clover may be adding little in the way of nitrogen to the pasture and compensatory nitrogen applications may be required.

Summer active grass weeds

AgPest — Sat, 30 Sep 2017 19:30:17 +0000

If your run-out pasture was infested with summer-active grass weeds last summer, consider growing a forage crop for one or two summers prior to sowing the perennial pasture. This provides the opportunity to selectively spray the summer-active grasses and prevent weed seeds from replenishing the seed bank and infesting newly sown pastures. Forage crops will also disrupt clover root weevil populations allowing better subsequent establishment of young clover.

Is clover root weevil an issue?

AgPest — Thu, 07 Sep 2017 22:01:26 +0000

If clover root weevil is an issue in your area, pasture renewal should incorporate a non-clover break crop. This weevil cannot survive in the absence of clover so a clover free break crop provides a temporary weevil-free environment that will allow clover seedlings to establish before the weevil reinvades. This will also reduce plant nematodes, plant pathogens and weeds and benefit the new pasture.

Clover root weevil present in most areas

AgPest — Mon, 31 Oct 2016 21:00:42 +0000

Clover root weevil will be very obvious in most areas –U shaped notches at the edge of clover leaves show adults are present. The presence of larvae may be indicated by the pasture appearing nitrogen deficient. While control is generally not an option careful management of clover will help maintain pasture quality. Additional nitrogen may need to be applied to pastures and clover should not be over grazed.

For further information on clover root weevil including biology, impact and control, follow the links below: