Chew Card Draft Protocol

Chew Cards Protocol for Landcare Groups for Annual Pest Free NZ Monitoring Draft Guidelines Prepared by Andrew Sinclair, Whakaupoko Landcare.,
Ph 09 2363 647
IntroductionChew Cards for Landcare Groups – Quick Guideline for Total Coverage

(Prepared by Andrew Sinclair, Whakaupoko Landcare,, Ph 09 2363647).

(Based on Chew Card Protocol developed by AHB.  Also information and comment supplied by Peter Sweetapple, Landcare Research).  Includes this excellent link for bite mark identification


Chew Cards are a great tool for monitoring pests. Also they can help you with finding where your pest are, so that you can sort them out. Chew Cards are simple and very effective. Give them a go.


1              Materials & Baiting

Chew Cards are made from 3mm thick corflute                                                      Chew Card

with the flutes parallel with the 90mm edges.                               90mm          Bait (on opposite sides)

NB: Cut the chew cards accurately with straight edges so that the

amount of bait in each card is uniform.  You can purchase chew cards

pre-baited from the likes of Connovation or source them from us


Bait        Using smooth peanut butter is most simple. For an even more

attractive bait you can add 20% icing sugar and / or 10% dark honey.

Whatever option you choose stay consistent.                         One full knife scoop = approx 15 – 20 gms

Use 15 – 20 gms / 10 cards / side

= 2gms / side and 4gms / card

Apply to only half of each side (so air not trapped).


Spreading Bait

Hold cards together and spread bait until all ends up inside

corflute holes. Wipe  excess onto edge cards as they often end

up with less. (Note holes of corflute are always on long side).

Use a broad knife or even better a paint scraper

The penetration of the bait should be 12 – 20mm and this can be checked by simply holding up the card in good light and viewing. The spread of bait should be at least 50mm wide.


2               Location

Attach to trees / fences etc, approx 30cm

above ground level using a 50 – 75mm flat head nail.

Fold in half and the top flap leave at approx. 45⁰

(NB: Avoid locating on fence lines with electric wires

as some pests avoid electric fences).


3              Spacing and places to locate Chew Cards.

  • In bush use 1 card every 50m and set as a path of best fit in terms of likely pest habitat and ease of locating. If the bush is wider than 200m then include additional lines approximately 150m distant from the first.
  • Along shelter lines use a spacing of 100m
  • In scattered bush ensure no bush is more than 100m away from a Chew Card
  • Locate Chew Cards close to rural houses and other buildings

4              Timing

  • Leave Chew Cards in place for 4 -7 days. On finding pest immediately set up pest control as possums for example keep visiting chew card sites for 10 – 11days after they are first put out.
  • Choose a time of the year when feed levels are usually quite low eg July / August


5              Interpreting, confirming and recording results

  • As well as the excellent Landcare Research link, refer Go to Whakaupoko Landcare Group Monitoring pages for more information.