Antifungal activities in methanol extracts of 31 plant species against Peronophythora litchii and Colletotrichum gloeosporioides

31 plant species collected from Guangdong province were screened for their antifungal activities against Peronophythora litchii and Colletotrichum gloeosporioides,the most important plant pathogens of Litchi.The antifungal compounds of the plant species were extracted with methanol.The antifungal activities of 31 methanol extracts were tested for their inhibition of mycelial radial growth at concentration of 0.01 g/mL.The results showed that the inhibitory rate of methanol extracts of 9 plant species were larger than 60% against P.litchii.Among them,the inhibitory rate of 4 plant species was 100%,they were Dendrobium tosaense,Nervilia fordii,Pueraria phaseoloides and Thunbergia grandiflora,respectively.As to C.gloeosporioides,the inhibitory rate of Emilia sonchifolia reached 100% while the inhibitory rate of Corydalis bungeana was 71.35%.To both of the P.litchii and C.gloeosporioides,only the inhibitory rate of methanol extracts of C.bungeana was larger than 50%.