RESEARCH ▶▶▶


battery cages were treated with 1kg/tonne of garlic flavour in the feed and measurements were taken to compare egg pro- duction, egg weight, egg condition, mortality and, of course, mite infestation levels.


Positive results Data analysis of all the measurements showed multiple bene- fits from the inclusion of garlic flavour in the feed. At the first trial farm the number of cracked eggs was significantly lower in the garlic flavour group than the control group (average across all facilities: 0.48% vs. 0.63%, P <0.05). The mortality rate was also significantly lower in the garlic flavour group than the control group (average across all facilities: 10.0% vs. 15.75%, P <0.05) as shown in Figure 1. At the second farm egg production was significantly higher in the garlic flavour group than the control group (avgerage across all facilities: 80.0% vs. 76.9%, P <0.05) and egg weight was slightly higher in the garlic flavour group than the control group (61.6g vs. 60.3g, P <0.05) as shown in Figure 2. The infestation score represents the average number of bird parts (i.e. cloaca, wings, back, neck) where mite presence was detected. Mite infestation was on average 9.4% (0.2 P) lower in the group fed the garlic flavour feed than in the control group.


The researchers concluded that a flavour based on garlic compounds is an effective alternative strategy that can be used to control and reduce mite infestation in laying hens. Under field conditions it reduced mortality rate and mite infestation while increasing egg production and egg quality. Given the results and Brazilian economic factors, the prod- uct delivered a ROI 3.78 times higher compare to the use of Cypermethrin, making the use of garlic not only a viable strategy for mite mitigation but also a sound business case.


Figure 2 - Results trial 2. Mite Infestation 3.0


0.0 0.5 1.0 1.5 2.0 2.5


Garlium Control


1.9 1.9 2.6 2.4 2.2 1.9 1.3 1.8 1.7 1.7 2.6 2.4


1


12


19


25 Evaluation days


46


67


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▶ POULTRY WORLD | No. 7, 2021


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Infestation score


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