Abstract
It is a wide opinion among farmers that when frost damage occurred in the tea garden the number of tea red spider (Tetranychus japonicus HOTTA) increased and gave much damage.In this paper, the population density of tea red spider was compared between seriously damaged year (1953) and not damaged year (1952). It showed no difference between the two years in April, but after the young leaves developed, the number of red spider on the new shoots very much increased in 1953 than in 1952.In 1953, speedy movement of adult red spider from old leaves to new ones was observed in a few days after frost fall, and the population density of red spider (adult and egg) much increased than in 1952.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
