Friday, 23 April 2021 06:55

Keeping FE at bay

Written by  Staff Reporters
Breeding for increased tolerance to FE should be the first line of defence. Breeding for increased tolerance to FE should be the first line of defence.

Facial Eczema (FE) is caused by spores of a fungus growing on the litter in the base of the sward.

These release a toxin which attacks the liver. It is a serious disease that affects sheep and cattle and can be fatal.

Your losses will be much greater than they appear. FE, when no symptoms are visible, can reduce lifetime productivity by up to 25%.

There are practical ways in which you can reduce your losses. Farmers should use two or three methods together.

Breeding for increased tolerance to FE should be your first line of defence.

Buying FE-tolerant rams will make a great difference in only a few years, but you have to be consistent in only bringing tolerant rams into your flock.

You can give all or part of your flock a zinc bolus, which lasts six weeks, or dose with zinc-oxide or fortnightly to reduce liver damage. For large numbers, you can spray zinc on pasture.

Quit stock early, build up feed reserves, and aim for light rotational grazing. Most vet clinics have a spore counting service. If one is not available, get together with other farmers and organise a spore counting service (persuade your vet clinic to offer the service, hire someone to do the counts).

Spore counts will help you identify the safer parts of the farm (the shady, windy places). Fungicide sprayed before the onset of FE season will reduce spore counts for five to six weeks.

Use these pastures for your replacement ewe lambs and hoggets. Aim to be likely stocked through the danger period.

Neighbouring farmers should get together to share knowledge and hear advisers. Don't relax precautions too soon - a few cool nights or heavy rain doesn't mean danger has passed.

Once spore counts rise, pastures remain toxic until the spores disappear. Faecal spore counting offers a method of determining how much challenge has occurred to the animals.

FE Checklist

Know the danger periods and at risk pastures:

  • Be vigilant during danger periods - January to May in most years.
  • Identify danger to animals from spore counts - on farm or local.
    Use historical records to identify most at risk paddocks.

Breeding animals for FE tolerance is a medium to long term strategy that:

  • Underpins other protective measures.
  • Can achieve significant tolerance in 5-10 years if managed well.
  • Requires consistent use of rams bred from tested and certified sites, from breeders using Ramguard.

Protecting animals with zinc:

  • Has a prophylactic effect in animals for FE protection.
  • Can be administered to sheep and cattle as a zinc oxide bolus or drench.
  • Is also effective if sprayed on pasture animals that are grazing.
  • Can be administered to cattle via the water supply.

Management during danger periods:

  • Use alternative crops such as chicory.
  • Practice lax grazing to avoid the toxic spores concentrated in the base of the sward.
  • Identify "safe" pasture from historical records and pasture spore counting.

Source: Beef+Lamb NZ's 'Facing up to facial eczema' booklet.

More like this

Promising early results for facial eczema test

Early results from a pilot study investigating the potential for a laboratory test to determine facial eczema (FE) tolerance are positive, paving the way for more detailed investigation.

New tools to tackle facial eczema

Herd improvement co-operative LIC says it is developing new methods to help farmers tackle facial eczema, a disease which is costing the dairy industry around $30 million in lost production each year.

High FE spore counts recorded

Facial eczema (FE) spore counts in some parts of the country are particularly high for this time of year and Beef + Lamb New Zealand is urging farmers to be extra vigilant.

National

Same old story!

NZ International Business Forum executive director Stephen Jacobi says the present FTA negotiations with the UK is depressing, with the…

Mayor slams Shaw's SNA claim

Grey District's mayor is unhappy at the lack of response from government ministers about concerns from West Coast leaders and…

Vets may choose Oz over NZ

Border restrictions are putting a roadblock in the way of getting more veterinarians to New Zealand and some are even…

Machinery & Products

One-pass cultivator moves 70% less soil

According to Kverneland distributor, Power Farming, the KultiStrip system will bring opportunities to farm environmentally, while improving yields and profitability.

Claas buys into bots

German harvesting specialist and tractor manufacturer Claas has acquired a minority shareholding in Dutch start-up company AgXeed, the developer of…

» The RNG Weather Report

» Latest Print Issues Online

The Hound

Thanks - not!

OPINION: Your canine crusader reckons one of the few things you can guarantee in farming - a bit like rates…

Careful

OPINION: A mate of the Hound's reckons the PM needs to be a bit careful about who or what she…

» Connect with Rural News

» eNewsletter

Subscribe to our weekly newsletter