Onion-pest
Guides
Phorbia
Wheat bulb fly, Black fly, Onion fly
Phorbia is a genus of true flies in the family Anthomyiidae. Several species are significant agricultural pests, including Phorbia coarctata (Wheat Bulb Fly) on cereals, Phorbia securis (Black Fly) on wheat, and Phorbia cepetorum (Imported Onion Fly) on Allium crops. Some species engage in unusual mutualistic interactions with Epichloe fungi, transporting spermatia between fungal individuals in a manner analogous to insect pollination of angiosperms. The genus occurs in Europe and North America.
Thrips tabaci
onion thrips, potato thrips, tobacco thrips, cotton seedling thrips, tomato thrips
Thrips tabaci is a minute agricultural pest thrips species known by multiple common names reflecting its broad host range. Adults measure 1–1.3 mm and exhibit highly female-biased sex ratios in many populations, with reproduction primarily by parthenogenesis. The species causes direct damage through rasping-sucking feeding and serves as a vector for multiple plant viruses including tomato spotted wilt virus and iris yellow spot virus. It is considered the most serious insect pest of onion crops in tropical regions and has achieved global distribution.