Lebanon Crop Management Video

Loading...

22 September 2011

Downed Cherry Trees Pastured cattle concerns after wind damage

With so many cherry trees that have blown over with the recent floods as cattle are put back into these environment be advised that those cherry leaves once wilted may contain cyanide. I have talked to several veterinarians and have found that once the leaves have fallen off the plant the cyanide levels will drop. However if the leaves are still connected to the plant stems the leaf tissue can draw toxins from the branches into the leaves.  Many factors lead to the breakdown of cyanide through hydrolosis and that will depend on many factors most notably if the leaves are still connected to the branches. They are recommending to clean the trees out ASAP and get as much of the dropped leaves off the ground before commencing grazing activities.
  I have personally been involved in  cases where several large dairy cows were killed by eating the leaves of cherry.  Pretty simple to diagnose since the cherry tree was down in the dry cow lot and you could see the hoof prints. The lab test came back to confirm so watch out.  Another case was with Ewe bushes that several young stock were killed by consuming the plants. The producer had fenced off a section around an abandoned home which had the ewe bushes and the cattle in there were dead in a week. Necropsy also confirmed.
Here is a factsheet that details the issue. I have some cherry that had gone down and I cleaned up as much as I could then turned the cattle out. I had thought I had removed most cherry trees but missed a couple and sure enough they were the ones to go over.  Once you cut the stump you need to apply the stump treatment before the tissue dries can be minutes in dry weather. A great reference for stump treatments from Florida State University is here http://edis.ifas.ufl.edu/ag245.  
Cut Stump
Imazapyr
(Arsenal AC or Stalker)
6 oz/gal (for Arsenal AC)
or
8-16 oz/gal (for Stalker)
Apply to the top and side of a freshly cut stump. Garlon 3A is excellent for this use. If surface of stump has began to dry prior to herbicide treatment, apply Chopper, Garlon 4, Remedy or Pasturegard in basal oil - or recut the stump and apply the freshly cut surface. Garlon 3A will not effectively mix with basal oils.
Triclopyr
(Garlon 3A)
50 - 100% in water
Triclopyr
(Remedy Ultra or Garlon Ultra)
25% solution in water or basal oil
Triclopyr + fluroxypyr
(Pasturegard)
50% solution in water or basal oil
Glyphosate
(several)
50-100%
Apply to cut stumps immediately after cutting. Glyphosate is not effective on stumps that have started to dry after cutting. If immediate treatment is not possible, other herbicides should be selected since glyphosate will not mix with basal oils.
Cut Stump
Imazapyr
(Arsenal AC or Stalker)
6 oz/gal (for Arsenal AC)
or
8-16 oz/gal (for Stalker)
Apply to the top and side of a freshly cut stump. Garlon 3A is excellent for this use. If surface of stump has began to dry prior to herbicide treatment, apply Chopper, Garlon 4, Remedy or Pasturegard in basal oil - or recut the stump and apply the freshly cut surface. Garlon 3A will not effectively mix with basal oils.
Triclopyr
(Garlon 3A)
50 - 100% in water
Triclopyr
(Remedy Ultra or Garlon Ultra)
25% solution in water or basal oil
Triclopyr + fluroxypyr
(Pasturegard)
50% solution in water or basal oil
Glyphosate
(several)
50-100%
Apply to cut stumps immediately after cutting. Glyphosate is not effective on stumps that have started to dry after cutting. If immediate treatment is not possible, other herbicides should be selected since glyphosate will not mix with basal oils.
Cut Stump
Imazapyr
(Arsenal AC or Stalker)
6 oz/gal (for Arsenal AC)
or
8-16 oz/gal (for Stalker)
Apply to the top and side of a freshly cut stump. Garlon 3A is excellent for this use. If surface of stump has began to dry prior to herbicide treatment, apply Chopper, Garlon 4, Remedy or Pasturegard in basal oil - or recut the stump and apply the freshly cut surface. Garlon 3A will not effectively mix with basal oils.
Triclopyr
(Garlon 3A)
50 - 100% in water
Triclopyr
(Remedy Ultra or Garlon Ultra)
25% solution in water or basal oil
Triclopyr + fluroxypyr
(Pasturegard)
50% solution in water or basal oil
Glyphosate
(several)
50-100%
Apply to cut stumps immediately after cutting. Glyphosate is not effective on stumps that have started to dry after cutting. If immediate treatment is not possible, other herbicides should be selected since glyphosate will not mix with basal oils.
So take a small sprayer and pre mix have it ready when you cut the final stump then treat it immediately.  Here is a complete write up of the situation.

Cherry Poisoning

Melissa Bravo had this to report pertaining to poisonous plants. 
Wild black cherry, choke cherry, jetbead, peaches, plums, apples, apricots, almonds (Prunus Family)
The prunus family contains many plants have may have poisonous parts to both livestock and humans. All plants parts including the pits and berries contain cyanide and HCN and discarding of ornamental and waste produce has lead to the death of livestock as well as those deaths associated with the grazing of these species in stressed pastures. Cyanide poisoning interferes with respiration and blood circulation; death is often swift (Kingsbury 1964, Cheeke 1983, Cheeke and Schull 1985). The lethal dose of HCN for cattle and sheep is about 2.0 mg/kg of body weight (Kingsbury 1964). Other signs of toxicity may include a short period of stimulation followed by slow pulse, dilated pupils, spasms, staggering, loss of consciousness, and death, which results from asphyxiation. Postmortem findings include bright red blood and congestion of internal organs (Kingsbury 1964, Scimeca and Oehme 1985).

No comments:

Post a Comment