EN
Genetic engineering is instrumental in two methods of pests control on cultivated plants: plant resistance and biological one. In both cases the aim is to improve the methods. Transgenic plants of enhanced resistance contain introduced genes of Bacillus thuringiensis responsible for the production of delta-endotoxin or genes encoding certain enzymes, enzyme inhihitors, toxins or insceticides. Such transgenic bean, cotton, tobacco, maize and other plants are cultivated in some countries. Also genetically improved baculovirus, bacteria, some parasites and predators were obtained. The improvement may deal with various traits like resistance to pesticides, tolerance to temperature, virulence, fecundity, non-diapausing strains etc. Transgenic bacteria decomposing pesticide residues in the environment may be also expected in the future.