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Aromatherapy 4 Pets

Carrier Oils and Other Ingredients

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Deadly plants to horses Print
Horses - Horse Caring
Written by Cass   

This list summarises Australian plants that can be lethal to horses. This list is not exhaustive.

Always consult your vet if you suspect poisoning and disallow the horse from accessing the source. This applies to any type of poisoning.

Name Pics Symptoms (only some listed)
Blue canary grass (Phalaris coerulescens) http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?
page=nswfl&lvl=gn&name=Phalaris
(spp)
Alkaloid poisoning

Sudden death

Cotton bushes (Gomphocarpus spp. & Asclepias spp.)

http://www.weeds.org.au/cgi-bin/weedident.cgi?
tpl=plant.tpl&ibra=all&card=H32

http://florabase.calm.wa.gov.au/browse/profile/11051

http://www.rbgsyd.nsw.gov.au/science/hot_science_topics/
Ecology_of_Cumberland_Plain_Woodland/woodland_plants/
gomphocarpus _fruticosus

http://cms.jcu.edu.au/discovernature/weedscommon/JCUDEV_012268

Cardiac glycosides poisoning.

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Crotalaria spp. http://www.anbg.gov.au/photo/apii/genus/Crotalaria Alkaloid poisoning
  • Depression
  • Changes in behaviour
  • Refusal to eat
  • Colics
  • Abdominal swelling
  • Possible death
Foxglove (Digitalis purpurea) http://www.health.qld.gov.au/poisonsinformationcentre/
plants_fungi/foxglove.asp

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Hemlock (Conium maculatum) http://www.dpi.vic.gov.au/dpi/vro/vrosite.nsf/pages/
weeds_herbs_biennial_hemlock
  • Muscle weakness
  • Respiratory failure
  • Death
  • Frequent urination and defecation
  • Staggering
Mother of Millions (Bryophyllum spp.) http://cms.jcu.edu.au/discovernature/weeds/JCUDEV_011578

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Oleander (Nerium oleander) http://cms.jcu.edu.au/discovernature/planttownsville/JCUDEV_006328

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Paradoxa grass (Phalaris paradoxa) http://florabase.calm.wa.gov.au/browse/photo/552 Alkaloid poisoning

Sudden death

Paterson's Curse (Echium plantagineum)

http://www.anbg.gov.au/photo/apii/id/dig/3310

http://www.anbg.gov.au/photo/apii/id/dig/3311

http://www.anbg.gov.au/photo/apii/id/a/12200

Alkaloid poisoning
  • Depression
  • Changes in behaviour
  • Refusal to eat
  • Colics
  • Abdominal swelling
  • Possible death
Prunus spp: this includes all prunus trees such as apricot, cherry, almond, plum, peach trees etc. Leaves are lethal, even dead ones Cyanide poisoning. Can occur within 10 minutes of eating the leaves.
  • Red mucous membranes
  • Rapid breathing
  • Convulsions
  • Coma
  • Death
Rubber vine (Cryptostegia grandiflora) and Purple rubber vine (Cryptostegia madagascariensis)

http://www.anbg.gov.au/photo/apii/id/dig/1618

http://www.anbg.gov.au/photo/apii/id/dig/1447

http://www.anbg.gov.au/photo/apii/id/mi/75

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Swainsona spp.

http://www.anbg.gov.au/photo/apii/id/a/12729

http://www.anbg.gov.au/photo/apii/id/a/5274

http://www.anbg.gov.au/photo/apii/id/a/30519

http://www.anbg.gov.au/photo/apii/id/a/30514

http://www.anbg.gov.au/photo/apii/id/a/30527

http://www.anbg.gov.au/photo/apii/id/a/21025

http://www.anbg.gov.au/photo/apii/id/a/30521

  • Weakness
  • Depression
  • Convulsions
  • Death
Two & One leaf cape tulips (Moraea miniata & Moraea flacida – also known as homeria falcida and homeria miniata) http://www.anbg.gov.au/photo/apii/id/a/12204

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Yellow Oleander (Cascabela thevetia) http://www.health.qld.gov.au/poisonsinformationcentre/
plants_fungi/yellowoleander.asp

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Ornithogalums (Ornithogalum spp.) http://florabase.calm.wa.gov.au/browse/profile/1372

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Blue periwinkle (Vinca major) http://www.dpi.vic.gov.au/DPI/Vro/vrosite.nsf/pages/
weeds_climbing_blue_periwinkle

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Pheasant’s eye (Adonis microcarpa) http://members.iinet.net.au/~weeds/western_weeds/
port_prim_prot_ranun.htm

Cardiac glycosides poisoning

Only few leaves can be toxic, even dead leaves.

  • Weakness
  • Diarrhoea
  • Sweating
  • Heart failure
  • Death
Black locust (Robinia pseudoacacia) http://florabase.calm.wa.gov.au/browse/profile/17020 Lectins poisoning
  • Colic
  • Diarrhoea
  • Dilated pupils
  • Irregular heart beat
  • Possible death
Crofton weed & Mistflower (Ageratina adenophora or Eupatorium adenophorum & Ageratina riparia or Eupatorium riparium)

http://www.anbg.gov.au/photo/apii/id/dig/2092

http://www.weedsbluemountains.org.au/crofton_weed.asp

http://www.southeastweeds.org.au/index.pl?page=148

Respiratory illness

  • Respiratory failure may occur during exercise
  • Depression
  • Weight loss
  • Can cause permanent lung damage
  • Death
Hardheads, Knapweed (Acroptilon repens, Centaurea repens)

http://www.dpi.vic.gov.au/dpi/vro/vrosite.nsf/pages/weeds
_herbs_perennial_hardheads

 

Sudden symptoms but the illness develops after a long period of exposure

  • Unability to drink or eat
  • Dehydration
  • Irreversible brain damage
  • Death by starvation and dehydration
St Barnaby's Thistle (Centaurea solstitialis) http://www.dpi.vic.gov.au/DPI/Vro/vrosite.nsf/pages/
weeds_herbs_annual_st_barnabys_thistle

Sudden symptoms but the illness develops after a long period of exposure

  • Unability to drink or eat
  • Dehydration
  • Irreversible brain damage
  • Death by starvation and dehydration
Blue Green Algae http://www.dpi.nsw.gov.au/agriculture/resources/water/quality/publications/bga-irrigation
  • Sudden death from cyanide poisoning
  • Photosensitisation (sunburn lesions) on non-pigmented skin
  • Muscle tremors
  • Diarrhoea and blood in the droppings
  • Liver damage
Red maple (Acer rubrum [Aceraceae])

http://www.flemings.com.au/ornamental_listing.asp?variety=Acer

 

  • Feed refusal
  • Red-brown urine
  • Jaundice
  • Weakness
  • Coma and death
Birdsville indogo, Creeping indigo (Indigofera linnaei, Indigofera spicata)

http://florabase.dec.wa.gov.au/browse/photo/3981

http://cms.jcu.edu.au/discovernature/weedscommon/JCUDEV_015507

 

Symptoms appear after around 10 days eating the plants

  • Loss of appetite
  • Depression
  • Dragging of hind legs
  • Paralysis of back legs
  • Death
Gympie Stinger, Gympi Gympi, Mulberry-leaved Stinger (Dendrocnide moroides)

http://www.anhs.com.au/stinging%20tree.htm

http://cms.jcu.edu.au/discovernature/plantcairns/JCUDEV_015500

The pain is so intense that affected horses enter into a hysteric state and die from self-destruction and self-harming

References:

  • Janusz Talalaj "Poisonous Plants in Australia" Echidna Press 2008
  • Mellisa Offord "Plants Poisonous to Horses, An Australian Field Guide" RIRDC 2006

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Last Updated on Tuesday, 09 December 2008 07:42
 

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