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Home Online Learning: Victorian Winter Rainfall Online Learning: Victorian Winter Rainfall—Introduction

Online Learning: Victorian Winter Rainfall—Introduction

The introduction gives a summary of the annual control program and describes the worm control regions and worms encountered here.

Structured reading

For those who like to see all the information and simply read through it in order. Each heading is a link to a page of information—the dot point provides a summary of the page.

Tip: Keep this page open and open the links in new tabs.

Victorian Winter Rainfall: Program summary
What to do and when to do it for an annual worm control program in this region. Day-to-day drenching decisions will use the Drench Decision Guide (see topic: When to WormTest and when to drench).

Victorian Winter Rainfall: Introduction
Information about the location, subregions and worms typically encountered here.

Question and answer

For those who prefer a problem based approach to learning, answer the following questions.
Each of the questions below links further down the page to the answers.


  1. What are the 5 strategies used to control worms in Victoria?
  2. What are the most important worms in this region?


You can also click on each question below to go to WormBoss pages with related information.

1. What are the 5 strategies used to control worms in Victoria?

  1. Use grazing management to create low worm-risk paddocks
  2. Breed and feed for worm-resistant sheep
  3. WormTest at recommended times
  4. Drench at recommended times
  5. Manage drench resistance

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2. What are the most important worms in this region?

The most important roundworms in this region are:

  • Scour worms

o Black scour worm Trichostrongylus vitrinus/ Trichostrongylus colubriformis
o Small brown stomach worm Teladorsagia (Ostertagia) circumcincta
o Thin-necked intestinal worm Nematodirus species

In specific areas in some or most years: the west coast of Victoria, some of the south-western edges of the state including up the border to Edenhope, coastal areas of East Gippsland, irrigation areas such as the Goulburn Valley and Pyramid Hill and extending further into the state in particularly wet years:

Very wet years generally cause higher burdens of all worms. These can be fatal without scouring occurring.

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