Verticillium wilt, caused by Verticillium dahliae Kleb., is a major constraint to cotton production in almost all countries in which G.hirsutum is cultivated. In 1993 half of the cotton field occurred diseases and the loss of the production was 1000 millions kg. In 1995 and 1996 it did harm to North cotton of China. Until now there are no resistant cultivars for the disease in China. It is an urgent affair to find high efficiency and stabilization means in cotton verticillium wilt research. The objective of the present work was to investigate the potential of combination the endo-bacteria and plant growth regulators for control of Verticillium wilt on cotton.
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