Studies on Stunt Disease of Hybrid Rice in Wenzhou Ⅰ. Vector, Host, Symptom and Morphology of Virus
Abstract: A rice virus-like disease broke out in Wenzhou, Zhejiang Province. The infected rice plants became stunt with darking and hardening leaves. Along the veins of sheath, culm and underside of leaves, some waxy swelling could be found, white first, then black brown. When four insects (Laodelphax striatellus, Nelaparvata lugens, Sogatella furoifela and Nephotettix cincticeps)were tested as vector candidates, only the small brown plant hopper(L. striatellus)transmitted the disease in a persistant manner without...