Nigel Cattlin / Californian red scale insect (Aonidiella aurantii) scales on Orange (Citrus sinensis) leaf, zonal chlorosis present. Native to China. Sicily, Italy. October.

Nick Upton / Oranges (Citrus sinensis) fruits ripening, Argolis, Peloponnese, Greece, August 2013.

Nick Upton / Unripe and ripe Oranges (Citrus sinensis) hanging on a tree in an orange grove, Argolis, Peloponnese, Greece, August 2013.

Juan Manuel Borrero / Orange (Citrus sinensis) tree flowers. Cultivated plant.

Juan Manuel Borrero / Orange tree (Citrus aurantium sinensis) fruit and flowers, Spain.

Jose B. Ruiz / Sweet orange tree with fruit {Citrus aurantium sinensis} Valencia, Spain

Jose B. Ruiz / Orange tree flowers {Citrus aurantium sinensis} Spain

Jose B. Ruiz / Orange flowers {Citrus aurantium sinensis} Spain

Jose B. Ruiz / Oranges on tree {Citrus aurantium sinensis} Spain

Nigel Cattlin / Normal, mono-embryonic Orange (Citrus sinensis) seedlings with normal single development of root and shoot.

Nigel Cattlin / Two polyembryonic Orange (Citrus sinensis) seedlings showing bifurcation, a malformation, with each seed developing two plants.

Nigel Cattlin / False codling moth (Thaumatotibia leucotreta) caterpillar on Orange (Citrus sinensis) fruit, South Africa.

Nigel Cattlin / Rows of orange trees (Citrus sinensis) with green, maturing fruit in an orchard in the Low Veldt, Transvaal, South Africa, February

Nigel Cattlin / Rows of orange trees (Citrus sinensis) with green, maturing fruit in an orchard in the Low Veldt, Transvaal, South Africa, February

Nigel Cattlin / Lance spraying of orange (Citrus sinensis) trees in fruit with pesticide without safety protection, South Africa, February

Jeff Foott / Orange (Citrus sinensis) trees outside Mission San Francisco Javier. Near Loreto, Baja California Sur, Mexico. 2020.