Effects of p-hydroxybenzoic Acid on Cowpea Fusarium Wilt Fungus
ZHAO Xiu-juan1，2,ZHANG Yan-rong3
1South China Agricultural University,Guangzhou 510642，Guangdong,China;2Guangdong Vocational College of Science and Trade，Guangzhou 510430,Guangdong,China；3Seed and Seedling Centre,Guangdong Academy of Agricultural Sciences，Guangzhou 510640,Guangdong,China
Abstract：Different concentrations of p-hydroxybenzoic acid(p-HB)were tested for their effects on conidial germination and mycelial growth of cowpea Fusarium wilt fungus,and seedling disease rate after challenge inoculation in the experiment.The results indicated that p-HB at the concentration of 5.0 and 10.0 mmol·L-1 had very significant inhibition to mycelial growth，at 1.0-10.0 mmol·L-1 p-HB had inhibition to conidial germination.10.0 mmol·L-1 p-HB could significantly reduce the seedling disease rate after challenge inoculation with Fusarium wilt fungus.
