A plant on which a pest lives or by which it is nourished. (EFSA European Food Safety Authority Glossary https://www.efsa.europa.eu/en/glossary/host-plant)
A gamete is a mature reproductive cell which is capable of fusing with a cell of similar origin but of opposite sex to form a zygote from which a new organism can develop. Gametes normally have a haploid chromosome content. In animals, a gamete is a sperm or egg; in plants, it is pollen, spermatic nucleus, or ovum. (FAO Glossary of Biotechnology for Food and Agriculture, 2012)
