Tasmanian Biosecurity Advisories
Department of Primary Industries, Parks, Water and Environment
Subscribing to get DPIPWE’s Biosecurity Advisories is the best way you can keep yourself up-to-date and fully informed about Tasmanian biosecurity issues. Our Advisories cover topics such as changes or proposed changes to Tasmania’s import regulations, animal health and welfare, plant health, forthcoming regulation reviews and opportunities for public comment, new or emerging pest/disease risks and a range of other matters related to Tasmania’s biosecurity.
Biosecurity Tasmania urges owners of sheep to be vigilant for any signs in their flock of cold stress brought about by forecast cold conditions and heavy rains. Sheep recently shorn and new lambs could be suffering due to the weather conditions and all reasonable precautions should be taken to minimise the effects of cold stress.
Sheep have a natural insulation to extreme weather with their fleece. In cold, wet and windy conditions, sheep shiver, huddle together in the mob and seek shelter behind windbreaks to produce and conserve heat. However, these mechanisms have limits. If weather stress is excessive or prolonged, the sheep's capacity to maintain a stable body temperature may be exceeded and cold stress will result. Hypothermia most commonly occurs in freshly shorn, light condition sheep during wet and windy conditions at any time of the year
Hypothermia literally means 'temperature below normal', occurs when too much body heat is lost or too little body heat is produced, and the result is a drop in body temperature. If weather stress is excessive or prolonged, a sheep's capacity to maintain a stable body temperature may be exceeded, and heat or cold stress will result.
High rainfall and high winds combined with temperatures below normal will cause mortalities in young animals, especially newly shorn sheep without shelter. The impact of the cold weather will depend on its duration, rainfall, wind speed and temperature—the 'wind chill' factor can double heat loss.
Sheep suffering from hypothermia often die as a result of their own behaviour and their attempts to cope. Sheep move in the direction of the wind until they are stopped by a barrier such as a fence, gully or creek. At this point they may pile on top of each other leading to suffocation or drowning. Sheep may be reluctant or unable to move when wet and cold.
Initially sheep will try to maintain their body temperature by:
If dealing with a small flock, consider applying garbage bags as coats for the sheep. Trials have shown that properly fitted plastic bags can decrease the loss of body heat even in severely hypothermic sheep.
Be prepared to relocate animals to a shed or land on higher ground, or move stock to paddocks with adequate windbreaks with tree or bush shelter in the event of very heavy rainfall or likely flooding.
Prioritise your animals, giving shelter to the most vulnerable such as the ewes and lambs and those newly shorn.
The Bureau of Meteorology have issued a flood watch for low lying / flood susceptible areas on Tasmania's east coast, advising graziers that they should prepare to move stock in expectation of heavy rainfall. Visit the BOM website for more information: http://www.bom.gov.au/jsp/watl/rainfall/pme.jsp
More information on caring for your sheep during cold weather can be found on the DPIPWE/Biosecurity Tasmania website: http://dpipwe.tas.gov.au/biosecurity-tasmania/animal-biosecurity/animal-welfare/hobby-farmers-and-smallholders/caring-for-sheep-in-cold-weather
(9/5/2018)Categories: Cropping; Horticulture; Invasive Species; Livestock; Natural environment; Pasture; Policy and Legislation; Wildlife;
A major effort is being undertaken to eradicate fruit fly from Tasmania.
(4/5/2018)Categories: Cropping; Freshwater pests; Gene technology; Horticulture; Invasive Species; Livestock; Marine pests; Natural environment; Pasture; Policy and Legislation; Seeds; Timber imports; Wildlife;
Citrus canker (Xanthomonas citri susbp citri) has recently been detected in the Northern Territory. Citrus canker is a serious disease of citrus and can have severe impacts on fruit quality and yield. Citrus canker is not harmful to people or animals.
Biosecurity Tasmania has declared citrus canker to be a List A disease under the Plant Quarantine Act 1997 and has re-instated the Import Requirement on the import of Citrus plants and plant products (including leaf material and fruit) as well as agricultural equipment and machinery that may have been in contact with the disease.
Find the re-instated Import Requirement 31 on the Biosecurity Tasmania website at: www.dpipwe.tas.gov.au/biosecurity-tasmania/plant-biosecurity/plant-import-restrictions
Citrus canker has been detected in Australia previously and been successfully eradicated.
For more information on citrus canker, signs and symptoms, visit the NSW Department of Primary Industries website at: www.dpi.nsw.gov.au/biosecurity/plant/insect-pests-and-plant-diseases/citrus-canker
Furher information can also be obtained at the Outbreak website: www.outbreak.gov.au/current-responses-to-outbreaks/citrus-canker
If you think you have seen symptoms that look like citrus canker, call the Plant Pest Hotline on 1800 084 881
(3/5/2018)Categories: Cropping; Gene technology; Horticulture; Natural environment; Pasture; Policy and Legislation; Seeds;
Dairy farmers are being encouraged to be vigilant and informed about an environmental disease that can affect cattle.
(19/3/2018)Categories: Cropping; Livestock; Natural environment; Pasture; Policy and Legislation;
Biosecurity Tasmania has identified the larvae of two fruit fly on a residential property at Lady Barron on Flinders Island. Entomologists have identified the larvae as a species of Bactrocera fruit fly.
The larvae were discovered on apricot fruit grown in a residential backyard. Biosecurity officers are currently conducting survey work on the property and liaising with the property owners. At this stage, the incursion appears to be an isolated incident. These investigations will look at response planning as well as treatment options for the potentially infected fruit.
Residents in and around Lady Barron will receive information in coming days that will outline Biosecurity Tasmania's response plan, the treatment options and what measures people can take relating to the movement and removal of fruit.
The Flinders Island community, together with visitors to the island are urged to be vigilant and to look out for signs of fruit fly and larvae. Fruit fly larvae look like blowfly maggots and are usually easy to see in the flesh of the fruit. People are required by law to report promptly any signs of fruit fly on their property. If you see anything suspicious, immediately call the Biosecurity Operations Centre on 1800 084 881.
Images and more information about fruit fly can be found on the DPIPWE website: http://dpipwe.tas.gov.au/biosecurity-tasmania/plant-biosecurity/pests-and-diseases/fruit-fly
(19/1/2018)Categories: Cropping; Horticulture; Invasive Species; Natural environment; Pasture; Policy and Legislation; Seeds;