Online Learning: Treatment – Safe Use of Pesticides in Sheep

1. Dermal or skin exposure occurs when chemical comes into direct contact with exposed skin, or where chemical soaks through clothing, or from handling stock treated recently with a topically-applied product.
2. Oral ingestion, occurs most often by handling food without first washing hands or drinking from a water bottle that may have been contaminated with chemical.
3. Inhalation of chemical fumes, particularly occurs when mixing concentrate, or inhaling aerosol droplets formed during treatment of sheep.

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If used according to label directions, oral treatments or backline applications generally pose the least risk of inadvertent chemical exposure. Watch out for leaking backpacks or application guns.

With shower dips, hand-jetting and jetting races, deflected spray or overspray can wet operators. These methods also produce aerosol droplets that can be inhaled. Wetting from overspray while operating the on/off valve for the top and bottom nozzles appears to be a major risk for operators of shower dips.

With hand jetting, the close proximity of the operator to the jetting wand and treated sheep presents a significant risk, whereas with jetting races accidental wetting from deflected sprays while moving stalled sheep, and the inhalation of aerosol droplets, present major risks.

With both plunge and cage dips, the main risks are during mixing of the dip wash, from standing too close to sheep that shake after leaving the dip and handling wet or recently treated sheep. Additionally, with plunge dips, there is a risk of exposure from splashing of sheep as they enter and leave the dip.

Although operated in essentially the same way, there are several styles of immersion cage dips. These vary in their design and in the protection from splashing and vapours they afford the operator. Read More

• Read and follow the safety direction on the label before each use.
• Choose a product with low toxicity and a method of application that minimises operator exposure.
• Wear appropriate protective clothing, as indicated on the label when handling the chemical or treated sheep.
• Avoid ingestion by washing hands, arms and face with soap and water after handling pesticides and especially before eating, drinking or smoking.
• Avoid breathing fumes or droplets from pesticide concentrates or diluted solution by wearing appropriate protective clothing and a face shield when handling pesticides and treated sheep.
• Install physical barriers (such as high, solid walls) to reduce operator exposure from dip/jetting fluid overspray.
• Comply with the Sheep Rehandling Interval stated on the label.
• Handling concentrates during mixing poses a particular safety risk. All precautions recommended on the label should be closely followed. Wear a face shield when dispensing product from the container.

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

The list of protective clothing and equipment required to be worn for the safe application of a particular lice chemical will always be found on the product label. Read More

Waterproof pants, gloves and boots are essential protective clothing when jetting and when handling wet treated sheep (i.e. from hand jetting, jetting races or from any form of dip. Read More

Litigation in New South Wales in the mid 1990s, resulting from the exposure of shearers during the use of pesticides on the shearing board, has made it clear that everyone working in the rural industry has a ‘duty of care’; a legal obligation to provide a safe workplace for employees. This duty of care must be demonstrated in all practices undertaken in the workplace. Attending a farm chemical safety training course and/or supporting employees to do the same is strongly recommended. Read More

If you suspect someone may have been poisoned by pesticides, whether treating or handling treated sheep or by accidental exposure to stored chemicals, don’t ‘wait and see’, instead, seek advice: Call an ambulance – dial 000 and call the Poisons Information Centre – dial 13 11 26. These numbers can be called from anywhere in Australia. Read More