Oak processionary experiment with bird houses for the great tit has been carried out since 2016. It has been observed that the great tit likes to eat the young, not yet hairy caterpillars in the month of April. In serious cases of contamination, the use of relatively mild chemical pest killers has been allowed by local authorities. Because chemicals may be harmful to other insects, an alternative is the use of vacuuming equipment to remove the caterpillars, followed by incinerating the caught specimens. Oak processionary The oak processionary "(Thaumetopoea processionea)" is a moth whose caterpillars can be found in oak forests. They
Chelates in animal nutrition to environmental concerns during the 1980s and 1990s, especially in Europe .Opinion of the Scientific Committee for Animal Nutrition on the use of zinc in feedingstuffs]. The European Union is concerned about possible detrimental effects of excess supplementation with trace minerals on the environment or human and animal health, and so in 2003 legislated a reduction in permitted feed concentrations of several trace metals (Co, Cu, Fe, Mn and Zn). Research in trace element nutrition has led to the development of more bioavailable organic minerals, including trace minerals derived from chelates. Chelates allow a lower supplementation rate of trace minerals