Rice ragged stunt virus including rice. The virus can only be transmitted by BPH and is not mechanically transmitted to plants. Rice plants infected with RRSV are stunted with whitish spindle-shaped outgrowths. Later the infected leaves become twisted with ragged edges, and may eventually turn brown. Rice plants may survive the infection, but yields are greatly reduced due to delayed flowering, incomplete panicle emergence, and unfilled grains. Symptoms of RRSV infection vary with the variety of rice and stage of growth. Most rice varieties of "Oryza sativa japonica" and "Oryza sativa indica" are susceptible to RRSV though several resistant varieties are available. Attempts to
Cannabis sativa Cannabis sativa Cannabis sativa is an annual herbaceous flowering plant indigenous to eastern Asia but now of cosmopolitan distribution due to widespread cultivation. It has been cultivated throughout recorded history, used as a source of industrial fiber, seed oil, food, recreation, religious and spiritual moods and medicine. Each part of the plant is harvested differently, depending on the purpose of its use. The species was first classified by Carl Linnaeus in 1753. The flowers of "Cannabis sativa" are unisexual and plants are most often either male or female. It is a short-day flowering plant, with staminate (male) plants usually taller