We should strive to eliminate chemicals from agri- and horticulture because chemical residues pose health hazards to consumers. Because of this scientific research is conducted into organic allies for combating pests. The search for plants with insecticidal and herbicidal properties is on. Allelopathy is key and we learn why celery and tomatoes should be planted together.
Meadow plants occur in communities with rich flora where species interact. Some species compete to survive: they fight for water, light, nutrients. The competition has led to various methods of defence against other plants. The release of a chemical that inhibits the growth of nearby plants is called allelopathy and it applies usually to competition in higher plants in the natural environment. Al- lelopathic impact can be used in interpretation of phenomena or effects of practical activity in agriculture.