If you are plagued by pests of the furry kind, try these deterrents. For possums, mulch your garden with sheep dags - possums are said to be none to partial to the smell of lanoline. Or spray your garden with neem oil or pongy fish fertiliser to repel them. Though keep fish fertiliser off young plants as it can burn the leaves. Stockholm Tar, available from farm and equestrian suppliers, can be sprayed onto fence posts and tree trunks to deter possums.
After surveying 22 earlier studies of deer repellents and then conducting their own controlled study at two different locations, researchers at Connecticut Agricultural Experiment Station concluded that egg-based repellents worked better than predator urines and blood-based products. Repellents applied more often were more effective than those applied less frequently.
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Overall treatment ranks are presented for all three crops and summarized in Table 2. All the products tested reduced feeding damage as compared to the nonsprayed control. Rotten eggs, followed by Thiram, had the highest efficacy in reducing deer feeding damage. Yet, only rotten eggs maintained feeding damage under 10% for all crops during these tests. Feeding damage to plants sprayed with Havahart and the nontreated control after five days were respectively 2% and 93% for hosta, and 8% and 45% for sweetpotato.
Tail biting is a most serious welfare problem in pigs raised for slaughter. In instances of an outbreak of tail biting, scientists have recommended that farmers take measures such as removal of affected animals, provision of enrichment materials and application of repellents to the pigs' tails. However, no scientific study has ever confirmed the efficacy of any of these suggestions in counteracting an ongoing outbreak. Here, the efficacy of two repellent ointments, Dippel's oil and Stockholm tar, were examined in a tail-chew test. For this, a novel piece of nylon rope was used as a tail model to measure biting behaviour semi-automatically in 24 single-sex groups of growing pigs (total 264 pigs). Repeated measures analysis showed no effect of time, gender or unit (12 pens per unit), but a highly significant effect of treatment, in that both Stockholm tar and Dippel's oil significantly reduced rope manipulation compared to controls. These results suggest that Stockholm tar and Dippel's oil may be effective in reducing tail biting. The approach taken may be valuable in further testing of strategies to reduce tail biting and improving pig welfare.