< Back to Quick Quiz Listing

Quick quiz: 2015 April

The quiz questions are taken from:

The online learning pages focus on the important topics within worms, flies and lice and offer two approaches to learning: structured reading and question and answer.

We also welcome suggested questions for the quiz, (either reply on the ParaBoss News email if you are subscribed or use Contact Us, at the bottom of the web page).

Answers and links to further information are provided below the image.

Questions

1. What is the purpose of a strategic drench?

2. List the 5 different chemical groups of current fly treatments, and the 6 different active compounds

3. What group of chemicals currently used to treat lice has the highest level of toxity for humans and so presents the greatest health risk if not used in a safe manner?


Use cattle as part of a paddock rotation to prepare low worm-risk paddocks.
Use cattle as part of a paddock rotation to prepare low worm-risk paddocks.

Answers

1. What is the purpose of a strategic drench?

Strategic drench: a drench given at a critical time to sheep that are susceptible to worm infection (e.g. weaners and pre-lambing ewes) and also given at times to reduce worm larval contamination of a pasture grazed by the drenched sheep over the following weeks or months. The sheep themselves may have had a low worm egg count at the time of this pre-emptive treatment.

2. List the 5 different chemical groups of current fly treatments, and the 6 different active compounds.

  • Insect growth regulator (IGR: cyromazine, dicyclanil)
  • Spinosyn (spinosad)
  • Macrocyclic lactone (ML: ivermectin)
  • Synthetic pyrethroid (SP: alpha-cypermethrin)
  • Organophosphate (OP: diazinon)

3. What are the most toxic group of chemicals currently used to treat lice?

Of the active ingredients commonly used on sheep, those in the OP (organophosphate) chemical group have the highest toxicity and represent the greatest risk.