Better information makes for healthier horses,
Horseadvice.com is where equine science and horse sense intersect.

Discussion on New deworming schedule .. when to use ivermectin

Use the navigation bar above to access articles and more discussions on this topic.
Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Shannon
Member
Username: stek

Post Number: 163
Registered: 10-2008
Posted on Thursday, Mar 12, 2009 - 2:41 pm:   Edit PostPrint Post
Dr. O, I was reviewing the udpated deworming schedule and had a question:

You list using ivermectin at the start of the fall warm season (daytime temps in the 45-85 region). I have always been told to use ivermectin after several killing frosts, more related to nighttime temps than daytime, with the idea that you want to use it to control bot eggs after the bot flies are dead.

Is this consistent with your recommendation?

Thanks!
Top of pagePrevious messageNext messageBottom of page Link to this message

Robert N. Oglesby DVM
Moderator
Username: dro

Post Number: 22538
Registered: 1-1997
Posted on Friday, Mar 13, 2009 - 10:05 am:   Edit PostPrint Post
Great question Shannon. The problem with trying to kill the "fall bot" after a few killing frosts is that may still be migrating L1 larvae and resistant to ivermectin. "Spring" and "early summer bots" are picked up by this fall deworming. The fall bots are then picked up as susceptible stage 3 larvae with the "beginning warm weather" moxidectin.

The article does give management instructions to lessen the impact of bots and makes deworming addendum's for heavy bot infestations. I have expanded this in the article to give more concrete instructions.
DrO
Post a Message to this Discussion
Posting
Instructions: 		Full Service Members may post to this discussion and should address the orignial poster's concerns or other information posted here. New questions about your horse should be started in a new discussion. Use the navigation bar at the top of this page to return to the parent article and review the article and existing discussions. If your question remains unanswered "Start a New Discussion", the link is under the list of discussions at the bottom of the article.
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username:
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action:
Home Page | Todays Discussions | Search | Top of Page Administration
  http://www.horseadvice.com
is The Horseman's Advisor
Helping Thousands of Equestrians, Farriers, and Veterinarians Every Day
All rights reserved, © 2009 		BBB Reliability Seal