Screening of endophytes from rubber trees (Hevea brasiliensis) for biological control of Corticium salmonicolor
NGUYEN VAN MINH
MAI HUU PHUC
DUONG NHAT LINH
TRAN THI A NI
TRAN KIEN DUC
NGUYEN ANH NGHIA
Abstract
28 leaves and living-tissue samples of rubber tree (Hevea brasiliensis) were collected from Ho ChiMinh City, Binh Phuoc province and Binh Duong province (Viet Nam). We isolated and screenedendophytes that have potential application as agents for biocontrol of Corticium salmonicolor, the agentof Pink Disease in rubber trees. As a result, 21 strains of endophytic bacteria and 14 strains of endophyticfungi were isolated. Antagonistic activity of the endophytes towards C. salmonicolor was checked byusing a dual culture. Testing results showed that: T9, T15 and T16 strains have inhibited C. salmonicolor.T9 and T16 strains showed result that 100% of inhibiting C. salmonicolor at the concentration of 1:1. Inthe test of ability to kill C. salmonicolor, T9 and T16 strains showed that they could kill C. salmonicolorafter 3 sprays of bacterial filtrate. T9 and T6 strains, which were identified by biochemical methods, havesimilar characteristics to Bacillus thuringiensis.
