Japanese Scientists Paint Cows to Deter Flies

Japanese scientists have painted cows with black and white stripes resembling zebras, with tests showing that the number of flies landing on the cows decreased by approximately 50%. Tags:

Scientists from Japan have found an unusual new method to reduce fly attacks on cows: painting the cows with black and white stripes resembling zebra patterns. This remarkable experiment provides further evidence that zebra patterns have emerged as a natural defense against flies.

This experiment is significant because it suggests a natural solution to reduce fly infestations on cattle, which is a major problem affecting milk and meat production. The research was conducted by scientists from the Aichi Agricultural Research Center and Kyoto University, and it involved six Japanese Black cows during the grazing seasons of 2017 and 2018.

The scientists tested the cows using three different conditions. Some of the cows were painted with black and white stripes resembling zebra patterns, using water-based paint. Others were painted with only black stripes, while a third group received no paint as a control. The stripes were 4 to 5 centimeters wide, and painting each cow took about five minutes.

The results were astonishing. Cows painted with zebra-like stripes attracted 50% fewer flies compared to unpainted cows or those painted with only black stripes. The scientists also observed that the striped cows exhibited 20% fewer behaviors attempting to resist flies, including head shaking, ear flicking, foot stomping, and tail swishing.

The scientists believe that the stripes disrupt how flies approach and land on the animals. Previous research has shown that flies behave differently when they see striped surfaces, and they struggle to land properly. This evidence supports the idea that zebra patterns have evolved as a defense against biting insects, rather than merely serving as camouflage or a distraction for predators.

The findings are also important for livestock production. Flies not only feed on the animals but also disrupt grazing, feeding, and sleeping, leading to stress-related behaviors. High fly populations have also been linked to decreased milk production and weight gain. Farmers often resort to using insecticides, but repeated use can lead to insect resistance. The scientists suggest that zebra-like patterns could be an environmentally friendly alternative to be integrated into traditional methods.

However, this approach has its challenges. The experiment was limited to only six cows, and the paint lasted only a few days. Further research is needed on different breeds of cattle, environments, and farming conditions before this method can be widely adopted.